# Inventus Reports Up to 75% Gold Recovery from Heap Leach Testwork at Pardo Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb Original source: https://money.tmx.com/en/quote/IVS/news/5992829863432306/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo Publisher: tmx Original announcement: 2026-08-06T11:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Inventus Mining Corp. - Ticker: IVS - Exchange: TSX - Region: Ontario - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Metallurgy - Extracted: 2026-09-14 06:24:00 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Inventus Mining Corp. reported positive gold heap leach test results at its Pardo Project in Ontario, with recoveries reaching up to 74.5% after 78 days. The results suggest a potential integrated processing strategy using ore sorting to separate high-grade material for milling from lower-grade material for heap leaching. Reasoning: Positive heap leach testwork showing up to 75% recovery with favorable reagent profiles, though suitability for high-grade ore is questioned. - Positive factor: responsive to cyanide leaching - Positive factor: front-loaded recovery - Positive factor: low cyanide consumption - Positive factor: no lime addition required - Negative factor: heap leach may not be preferred for higher-grade material - Negative factor: performance on high-grade composite may not predict lower-grade response Facts used in scoring: 9 ## Classification and evidence **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: The metallurgical program evaluated gold recovery using column leach/heap leach testwork. Evidence · text > positive metallurgical heap leach test results **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: The results are from laboratory-scale column leach tests using 310 kg composites. Evidence · text > The results are laboratory-scale and pertain only to the samples tested. **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The release mentions the use of multiple large-mass Photon assays to reduce sampling uncertainty. Evidence · text > Multiple large-mass Photon assays were used to reduce sampling uncertainty **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: only one composite was tested ## Extracted facts Stored fact records: 9. Some facts used in scoring do not have a stored record. ## Metallurgical Results (9) ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-0) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 64.3 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Reagents - Cyanide: 1.14 kg/t - Lime: 0 kg/t - Reagent Notes: low total cyanide consumption of 1.14 kg/t over 78 days and required no lime addition to maintain optimal leach pH above 10.5 #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Strong initial recovery and favorable reagent profile for the -1/4 inch crush size. - Positive factor: front-loaded recovery - Positive factor: low cyanide consumption Evidence · table > 64.3% Context: 2.694 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-1) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 72 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Significant recovery achieved within 48 days. - Positive factor: front-loaded recovery Evidence · table > 72.0% Context: 2.694 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-2) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 74.5 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Highest recovery achieved in the test program. - Positive factor: up to 75% recovery Evidence · table > 74.5% Context: 2.694 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-3) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 53.1 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Lower recovery compared to the -1/4 inch column. Evidence · table > 53.1% Context: 1.514 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-4) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 60 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 60.0% Context: 1.514 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-5) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 66.9 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 66.9% Context: 1.514 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-6) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 61.1 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 61.1% Context: 1.910 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-7) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 65.1 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 65.1% Context: 1.910 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-extractions.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--a7892b52-a7cf-478b-b6d2-e6d07861fceb#fact-metallurgical-facts-8) Pardo · gold #### Identity - Project: Pardo - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 69.5 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 69.5% Context: 1.910 #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ## 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.