# Cerro de Pasco Resources Advances Metallurgical Test Program; Evaluates Two-Concentrate Flowsheet for Silver-Bearing Pyrite and Base Metals Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b Original source: https://money.tmx.com/en/quote/CDPR/news/8252770858093548/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce Publisher: tmx Original announcement: 2026-06-09T13:44:45.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Cerro de Pasco Resources Inc. - Ticker: CDPR - Exchange: TSX - Region: central Peru - Primary commodity: Silver - Secondary commodities: Zinc, Lead, Copper, Sulfur, Gallium, Indium - Document categories: Metallurgy - Extracted: 2026-09-19 14:34:50 UTC Narrative sentiment: 0.70 · Bullish ## Minestarters Atlas summary Cerro de Pasco Resources has advanced its metallurgical test program for the Quiulacocha Tailings Reprocessing Project in central Peru, reporting strong silver and sulphide recovery in both bench-scale and mini-pilot plant tests. The company is evaluating a two-concentrate flowsheet to produce a silver-bearing pyrite concentrate and a base metal concentrate, with the pyrite stream showing potential as a sulphur feedstock. While results are positive and corroborate earlier findings, further optimization and studies are required to confirm commercial viability and overall deposit representativeness. Reasoning: The document reports positive metallurgical test results from both bench-scale and mini-pilot plant programs for the Quiulacocha Tailings Reprocessing Project. Key highlights include strong silver and sulphide recovery into a bulk concentrate, the development of a two-concentrate flowsheet, and the potential for pyrite as a sulphur resource. While results are promising and show good reproducibility from bench to mini-pilot scale, the work is still at an exploratory stage, and further studies are needed to confirm commercial viability and representativeness across the entire deposit. - Positive factor: Strong silver and sulphide recovery in mini-pilot plant testing, indicating good metallurgical responsiveness. - Positive factor: Development of a two-concentrate flowsheet \(pyrite and base metals\) with both containing silver, suggesting potential for multiple revenue streams. - Positive factor: Mini-pilot plant results corroborate bench-scale findings, providing initial indication of scaled-up reproducibility. - Positive factor: Pyrite concentrate stream being evaluated as an alternative source of sulphur for essential industries, adding potential value to a previously considered challenge. - Positive factor: Low sulphide tailings targeted, which may reduce acid-generation potential, addressing a key environmental objective. - Negative factor: Exploratory nature of gallium and indium test-work, with potential being conceptual at this stage. - Negative factor: Results are from specific samples and conditions, not yet demonstrated at commercial scale or representative of the whole tailings. - Negative factor: Further optimization work, Phase 2 drilling, and additional engineering studies are required before conclusions can be drawn about the deposit as a whole. Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 168 ## Classification and evidence **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: the document describes a flotation route \("flotation"\) **POX/BIOX Route** Polarity: neutral Definition: Pressure or bio-oxidation for refractory ore — high CAPEX and OPEX. Why it applies: the document describes a pox\_biox route \("roasting"\) **Multi-Domain Tested** Polarity: positive Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed. Why it applies: 3 distinct composites were tested ## Extracted facts Stored fact records: 168. Some facts used in scoring do not have a stored record. ## Metallurgical Results (168) ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-0) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 55.62 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. - Positive factor: Bench-scale test provides initial data for flowsheet development. Evidence · table > 55.62 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-1) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.14 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.14 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-2) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.14 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.14 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-3) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.14 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 1.14 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-4) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.43 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.43 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-5) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.3 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.30 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-6) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 34.69 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 34.69 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-7) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 33.96 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 33.96 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-8) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 52.65 - Head Grade Unit: g/t #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 52.65 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-9) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.12 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.12 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-10) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.88 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 0.88 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-11) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.48 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.48 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-12) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.25 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.25 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-13) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 31.45 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 31.45 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-14) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.51 - Head Grade Unit: % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.51 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-15) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 47.83 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 47.83 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-16) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 0.09 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.09 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-17) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 0.95 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 0.95 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-18) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 1.54 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.54 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-19) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 30.93 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 30.93 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-20) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Head Grade: 27.97 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 27.97 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-21) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 45.77 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.77 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-22) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.15 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.15 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-23) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.11 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.11 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-24) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.87 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 0.87 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-25) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.51 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.51 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-26) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.25 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.25 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-27) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.67 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 29.67 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-28) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.85 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.85 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-29) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 45.42 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.42 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-30) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.04 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-31) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.03 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.03 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-32) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.49 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.49 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-33) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.17 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.17 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-34) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.19 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.19 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-35) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 32.11 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 32.11 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-36) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 30.29 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 30.29 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-37) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 45.45 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.45 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-38) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.04 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-39) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.03 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.03 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-40) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.47 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.47 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-41) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.25 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.25 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-42) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.19 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.19 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-43) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 32.64 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 32.64 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-44) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 29.66 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.66 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-45) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 46.39 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 46.39 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-46) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.04 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-47) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.03 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.03 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-48) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.5 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.50 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-49) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.22 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.22 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-50) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.19 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.19 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-51) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 31.91 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 31.91 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-52) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 29.89 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.89 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-53) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 45.76 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.76 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-54) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.14 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.14 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-55) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.11 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.11 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-56) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.82 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 0.82 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-57) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.49 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.49 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-58) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.23 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.23 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-59) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.39 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 29.39 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-60) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.71 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.71 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-61) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 45.93 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.93 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-62) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.13 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.13 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-63) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.12 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.12 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-64) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.87 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for lead. Evidence · table > 0.87 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-65) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.53 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.53 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-66) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.24 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.24 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-67) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.57 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 29.57 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-68) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 29.47 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.47 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-69) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 45.22 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 45.22 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-70) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.04 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-71) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.03 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.03 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-72) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.51 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.51 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-73) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.19 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.19 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-74) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.18 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.18 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-75) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 32.26 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 32.26 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-76) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 28.85 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 28.85 Context: FT-40 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-77) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 44.65 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a high head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: High head grade for silver. Evidence · table > 44.65 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-78) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.04 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-79) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.04 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.04 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-80) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.5 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.50 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-81) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.2 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.20 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-82) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.19 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.19 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-83) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 32.16 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 32.16 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-84) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 29.29 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 29.29 Context: FT-42 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-85) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 37.4 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows a moderate head grade for silver, contributing positively to the overall metallurgical understanding of the project. - Positive factor: Moderate head grade for silver. Evidence · table > 37.40 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-86) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.17 - Head Grade Unit: g/t #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The gold head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for gold. Evidence · table > 0.17 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-87) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.09 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.09 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-88) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.37 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low, contributing to the base metal potential. - Positive factor: Low head grade for lead. Evidence · table > 0.37 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-89) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 1.65 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.65 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-90) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 0.17 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Arsenic is present at a level that could be a deleterious element, potentially impacting concentrate quality or processing costs. - Negative factor: Presence of arsenic, a deleterious element, which may incur penalties or require specific processing. Evidence · table > 0.17 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-91) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 26.94 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 26.94 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-92) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Head Grade: 27.64 - Head Grade Unit: % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 27.64 Context: FT-4 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-93) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 49.2 - Head Grade Unit: g/t #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This mini-pilot test shows a high head grade for silver, indicating strong potential for recovery at a larger scale. - Positive factor: High head grade for silver. - Positive factor: Mini-pilot scale test provides higher confidence in results. Evidence · table > 49.20 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-94) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.03 - Head Grade Unit: % #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The copper head grade is relatively low, indicating it is a minor component in this test. - Negative factor: Low head grade for copper. Evidence · table > 0.03 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-95) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 0.52 - Head Grade Unit: % #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The lead head grade is low to moderate, contributing to the base metal potential. - Positive factor: Low to moderate head grade for lead. Evidence · table > 0.52 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-96) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 1.13 - Head Grade Unit: % #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The zinc head grade is moderate, contributing to the base metal potential. - Positive factor: Moderate head grade for zinc. Evidence · table > 1.13 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-97) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 34.1 - Head Grade Unit: % #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron content is expected given the pyrite-dominant nature of the tailings, which is a key focus of the flowsheet. - Positive factor: High iron content, consistent with pyrite-dominant feed. Evidence · table > 34.10 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### mini-pilot [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-98) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: mini-pilot - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Head Grade: 28.7 - Head Grade Unit: % #### Lab - Laboratory: SGS Chile #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: The high sulphur head grade is a positive indicator for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: High sulphur content, supporting the potential for a pyrite concentrate as a sulphur source. Evidence · table > 28.70 Context: MG\#6 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Pilot Scale Complete** Polarity: positive Definition: Pilot or demonstration plant testing completed under continuous operation. Why it applies: test\_type names pilot-scale work **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-99) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 88.5 % - Recovery Basis: actual\_test - Conc. Grade: 71.79 - Conc. Grade Unit: g/t - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 88.5 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-100) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 88.4 % - Recovery Basis: actual\_test - Conc. Grade: 0.18 - Conc. Grade Unit: g/t - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 88.4 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-101) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 84.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.17 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 84.6 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-102) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 68.8 % - Recovery Basis: actual\_test - Conc. Grade: 1.14 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate lead recovery and concentrate grade contribute to the overall base metal potential. - Positive factor: Moderate lead recovery and concentrate grade. Evidence · table > 68.8 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-103) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 80.7 % - Recovery Basis: actual\_test - Conc. Grade: 1.69 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 80.7 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-104) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 87.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.38 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 87.6 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-105) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 84.8 % - Recovery Basis: actual\_test - Conc. Grade: 42.95 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 84.8 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-106) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 97.8 % - Recovery Basis: actual\_test - Conc. Grade: 48.44 - Conc. Grade Unit: % - Mass Pull: 68.5 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.8 Context: FT-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-107) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 89.3 % - Recovery Basis: actual\_test - Conc. Grade: 75.16 - Conc. Grade Unit: g/t - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 89.3 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-108) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 83.4 % - Recovery Basis: actual\_test - Conc. Grade: 0.15 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 83.4 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-109) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 65.9 % - Recovery Basis: actual\_test - Conc. Grade: 0.92 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate lead recovery and concentrate grade contribute to the overall base metal potential. - Positive factor: Moderate lead recovery and concentrate grade. Evidence · table > 65.9 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-110) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 82.3 % - Recovery Basis: actual\_test - Conc. Grade: 1.94 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 82.3 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-111) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 86.5 % - Recovery Basis: actual\_test - Conc. Grade: 0.35 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 86.5 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-112) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 82.6 % - Recovery Basis: actual\_test - Conc. Grade: 41.53 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 82.6 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-113) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 97 % - Recovery Basis: actual\_test - Conc. Grade: 45.76 - Conc. Grade Unit: % - Mass Pull: 62.6 % #### Lab - Laboratory: XPS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.0 Context: F007 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-114) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 92.8 % - Recovery Basis: actual\_test - Conc. Grade: 72.98 - Conc. Grade Unit: g/t - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 92.8 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 92.8% is at or above the exceptional band \(90%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-115) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 92.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.14 - Conc. Grade Unit: % - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Very good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Very good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 92.6 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 92.6% is at or above the exceptional band \(92%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-116) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 78 % - Recovery Basis: actual\_test - Conc. Grade: 1.22 - Conc. Grade Unit: % - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong lead recovery and good concentrate grade contribute to the overall base metal potential. - Positive factor: Strong lead recovery and good concentrate grade. Evidence · table > 78.0 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-117) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 75.2 % - Recovery Basis: actual\_test - Conc. Grade: 1.9 - Conc. Grade Unit: % - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 75.2 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-118) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 81.4 % - Recovery Basis: actual\_test - Conc. Grade: 41.39 - Conc. Grade Unit: % - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 81.4 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-119) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0005-GM #### Recovery - Recovery: 97.2 % - Recovery Basis: actual\_test - Conc. Grade: 44.73 - Conc. Grade Unit: % - Mass Pull: 60.8 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.2 Context: KF-5 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-120) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 87.4 % - Recovery Basis: actual\_test - Conc. Grade: 69.99 - Conc. Grade Unit: g/t - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 87.4 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-121) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 88 % - Recovery Basis: actual\_test - Conc. Grade: 0.22 - Conc. Grade Unit: g/t - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 88.0 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-122) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 83.2 % - Recovery Basis: actual\_test - Conc. Grade: 0.17 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 83.2 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-123) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 63 % - Recovery Basis: actual\_test - Conc. Grade: 0.96 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate lead recovery and concentrate grade contribute to the overall base metal potential. - Positive factor: Moderate lead recovery and concentrate grade. Evidence · table > 63.0 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-124) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 81.3 % - Recovery Basis: actual\_test - Conc. Grade: 2.15 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 81.3 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-125) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 85.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.38 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 85.6 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-126) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 78.9 % - Recovery Basis: actual\_test - Conc. Grade: 40.94 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 78.9 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-127) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 95.9 % - Recovery Basis: actual\_test - Conc. Grade: 50.07 - Conc. Grade Unit: % - Mass Pull: 57.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 95.9 Context: FT-1 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-128) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 93.6 % - Recovery Basis: actual\_test - Conc. Grade: 69.68 - Conc. Grade Unit: g/t - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 93.6 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 93.6% is at or above the exceptional band \(90%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-129) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 84.1 % - Recovery Basis: actual\_test - Conc. Grade: 0.05 - Conc. Grade Unit: g/t - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 84.1 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-130) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 79 % - Recovery Basis: actual\_test - Conc. Grade: 0.04 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 79.0 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 79% is below the weak band \(80%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-131) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 74.5 % - Recovery Basis: actual\_test - Conc. Grade: 0.6 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong lead recovery and good concentrate grade contribute to the overall base metal potential. - Positive factor: Strong lead recovery and good concentrate grade. Evidence · table > 74.5 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-132) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 71.6 % - Recovery Basis: actual\_test - Conc. Grade: 1.38 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 71.6 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-133) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 90.8 % - Recovery Basis: actual\_test - Conc. Grade: 0.29 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 90.8 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-134) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 74.6 % - Recovery Basis: actual\_test - Conc. Grade: 39.28 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 74.6 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-135) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 97.7 % - Recovery Basis: actual\_test - Conc. Grade: 48.52 - Conc. Grade Unit: % - Mass Pull: 61 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.7 Context: FT-39 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-136) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 94.6 % - Recovery Basis: actual\_test - Conc. Grade: 69.41 - Conc. Grade Unit: g/t - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 94.6 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 94.6% is at or above the exceptional band \(90%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-137) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 84.4 % - Recovery Basis: actual\_test - Conc. Grade: 0.05 - Conc. Grade Unit: g/t - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 84.4 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-138) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 78.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.04 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 78.6 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 78.6% is below the weak band \(80%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-139) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 76.1 % - Recovery Basis: actual\_test - Conc. Grade: 0.58 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong lead recovery and good concentrate grade contribute to the overall base metal potential. - Positive factor: Strong lead recovery and good concentrate grade. Evidence · table > 76.1 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-140) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 74.8 % - Recovery Basis: actual\_test - Conc. Grade: 1.51 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 74.8 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-141) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 90.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.28 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 90.6 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-142) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 74.9 % - Recovery Basis: actual\_test - Conc. Grade: 39.45 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 74.9 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-143) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 98.6 % - Recovery Basis: actual\_test - Conc. Grade: 47.18 - Conc. Grade Unit: % - Mass Pull: 62 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 98.6 Context: FT-41 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-144) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 92 % - Recovery Basis: actual\_test - Conc. Grade: 70.42 - Conc. Grade Unit: g/t - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 92.0 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 92% is at or above the exceptional band \(90%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-145) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 83.3 % - Recovery Basis: actual\_test - Conc. Grade: 0.06 - Conc. Grade Unit: g/t - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 83.3 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-146) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 80.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.04 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 80.6 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-147) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 70 % - Recovery Basis: actual\_test - Conc. Grade: 0.58 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong lead recovery and good concentrate grade contribute to the overall base metal potential. - Positive factor: Strong lead recovery and good concentrate grade. Evidence · table > 70.0 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-148) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 62.9 % - Recovery Basis: actual\_test - Conc. Grade: 1.27 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Moderate zinc recovery and good concentrate grade. Evidence · table > 62.9 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-149) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 89 % - Recovery Basis: actual\_test - Conc. Grade: 0.28 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 89.0 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-150) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 74.8 % - Recovery Basis: actual\_test - Conc. Grade: 39.41 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 74.8 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-151) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 26-0001-BK #### Recovery - Recovery: 97.1 % - Recovery Basis: actual\_test - Conc. Grade: 47.93 - Conc. Grade Unit: % - Mass Pull: 60.6 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.1 Context: FT-37 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-152) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 87.2 % - Recovery Basis: actual\_test - Conc. Grade: 67.75 - Conc. Grade Unit: g/t - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 87.2 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-153) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 89.2 % - Recovery Basis: actual\_test - Conc. Grade: 0.22 - Conc. Grade Unit: g/t - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 89.2 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-154) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 81.9 % - Recovery Basis: actual\_test - Conc. Grade: 0.15 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 81.9 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-155) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 63.6 % - Recovery Basis: actual\_test - Conc. Grade: 0.89 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate lead recovery and concentrate grade contribute to the overall base metal potential. - Positive factor: Moderate lead recovery and concentrate grade. Evidence · table > 63.6 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-156) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 78 % - Recovery Basis: actual\_test - Conc. Grade: 1.97 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 78.0 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-157) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 85.9 % - Recovery Basis: actual\_test - Conc. Grade: 0.34 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 85.9 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-158) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 81 % - Recovery Basis: actual\_test - Conc. Grade: 40.42 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 81.0 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-159) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 97.3 % - Recovery Basis: actual\_test - Conc. Grade: 49.08 - Conc. Grade Unit: % - Mass Pull: 58.9 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 97.3 Context: FT-2 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-160) Quiulacocha Tailings Reprocessing Project · silver #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: silver - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 89.5 % - Recovery Basis: actual\_test - Conc. Grade: 69.43 - Conc. Grade Unit: g/t - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: This bench-scale test shows strong silver recovery and a high concentrate grade, indicating good metallurgical performance. - Positive factor: High silver recovery. - Positive factor: High concentrate grade for silver. Evidence · table > 89.5 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-161) Quiulacocha Tailings Reprocessing Project · gold #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: gold - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 86 % - Recovery Basis: actual\_test - Conc. Grade: 0.2 - Conc. Grade Unit: g/t - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good gold recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good gold recovery despite low head grade. - Negative factor: Low concentrate grade for gold. Evidence · table > 86.0 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-162) Quiulacocha Tailings Reprocessing Project · copper #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: copper - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 78.1 % - Recovery Basis: actual\_test - Conc. Grade: 0.16 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Good copper recovery is observed, but the low concentrate grade suggests it's a minor component. - Positive factor: Good copper recovery despite low head grade. - Negative factor: Low concentrate grade for copper. Evidence · table > 78.1 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 78.1% is below the weak band \(80%\) **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-163) Quiulacocha Tailings Reprocessing Project · lead #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: lead - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 60.7 % - Recovery Basis: actual\_test - Conc. Grade: 0.95 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Moderate lead recovery and concentrate grade contribute to the overall base metal potential. - Positive factor: Moderate lead recovery and concentrate grade. Evidence · table > 60.7 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-164) Quiulacocha Tailings Reprocessing Project · zinc #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: zinc - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 77.9 % - Recovery Basis: actual\_test - Conc. Grade: 2.16 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Strong zinc recovery and good concentrate grade indicate favorable metallurgical performance for zinc. - Positive factor: Strong zinc recovery and good concentrate grade. Evidence · table > 77.9 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-165) Quiulacocha Tailings Reprocessing Project · arsenic #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: arsenic - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 81.3 % - Recovery Basis: actual\_test - Conc. Grade: 0.35 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High recovery and concentrate grade of arsenic suggest a significant challenge for concentrate marketability due to penalty elements. - Negative factor: High recovery of arsenic into concentrate, indicating a potential penalty element issue. - Negative factor: High concentrate grade for arsenic. Evidence · table > 81.3 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-166) Quiulacocha Tailings Reprocessing Project · iron\_ore #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: iron\_ore - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 76.4 % - Recovery Basis: actual\_test - Conc. Grade: 40.88 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: High iron recovery and concentrate grade are expected and positive for the pyrite concentrate stream. - Positive factor: High iron recovery and concentrate grade, consistent with pyrite concentration. Evidence · table > 76.4 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### bench [Link to this fact](https://atlas-extractions.minestarters.com/news/cerro-de-pasco-resources-advances-metallurgical-test-program-evaluates-two-conce--38473eb4-b775-4336-b09b-4a449f9ba17b#fact-metallurgical-facts-167) Quiulacocha Tailings Reprocessing Project · sulfur #### Identity - Project: Quiulacocha Tailings Reprocessing Project - Commodity: sulfur - Region: peru - Reported Region: central Peru - Ticker: CDPR #### Test Work - Program Status: preliminary - Test Type: bench - Processing Route: sequential flotation - Sample: 25-0009-GM #### Recovery - Recovery: 93 % - Recovery Basis: actual\_test - Conc. Grade: 49.6 - Conc. Grade Unit: % - Mass Pull: 59.2 % #### Lab - Laboratory: Plenge #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-09T00:00:00.000Z Reasoning: Exceptional sulphur recovery and high concentrate grade are very positive for the potential of the pyrite concentrate as a sulphur feedstock. - Positive factor: Exceptional sulphur recovery and high concentrate grade, supporting the pyrite concentrate strategy. Evidence · table > 93.0 Context: FT-7 #### Tags used in scoring **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: processing\_route matches the flotation signal **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.