# Lara Reports Results of Preliminary Economic Assessment for its Planalto Copper-Gold Project Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda Original source: https://money.tmx.com/en/quote/LRA/news/4942547144035599/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper- Publisher: tmx Original announcement: 2025-10-21T10:30:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Lara Exploration Ltd. - Ticker: LRA - Exchange: TSX - Region: Pará State, Brazil - Primary commodity: Copper - Secondary commodities: Gold - Document categories: Resource update, Metallurgy - Extracted: 2026-09-12 11:34:10 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Lara Exploration Ltd. announced positive results from a Preliminary Economic Assessment \(PEA\) for its 100% owned Planalto Copper-Gold Project in Brazil, highlighting an after-tax NPV of US$378 million \(8% discount rate\) and an IRR of 21% over an 18-year mine life. The study projects average annual production of 36 kt copper and 7.2 koz gold in the first six years, with life-of-mine totals of 560 kt copper and 111 koz gold, based on an open pit operation and conventional flotation processing achieving 90.9% copper and 51.1% gold recovery. Initial capital expenditures are estimated at US$546 million, with all-in sustaining costs of US$2.70/lb payable copper, though the PEA relies heavily on Inferred Mineral Resources \(76%\) and excludes oxide mineralization. Reasoning: The PEA demonstrates strong economic viability for the Planalto Copper-Gold Project with robust NPV and IRR, supported by good copper recoveries and excellent infrastructure, despite a high proportion of inferred resources and the preliminary nature of the study. - Positive factor: Strong PEA economics \(NPV, IRR, payback\) - Positive factor: Good copper recovery \(90.9%\) - Positive factor: Excellent infrastructure and positive permitting environment in Brazil - Positive factor: Low carbon footprint due to renewable energy grid - Positive factor: QP/CP signed and NI 43-101 compliant - Negative factor: High proportion of Inferred Resources \(76%\) in the PEA - Negative factor: PEA is preliminary in nature \(scoping level\) - Negative factor: Oxide mineralization excluded from the PEA - Negative factor: SUDAM tax benefits assumed but not yet confirmed - Negative factor: Gold recovery is low \(51.1%\) Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 13 ## Classification and evidence **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: The document reports the results of a Preliminary Economic Assessment \(PEA\) for the project. Evidence · text > Lara Reports Results of Preliminary Economic Assessment for its Planalto Copper-Gold Project **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The PEA includes a significant proportion \(76%\) of Inferred Mineral Resources, which are considered speculative. Evidence · text > The PEA is preliminary in nature and includes Inferred Mineral Resources which make up approximately 76% of the total Mineral Resources. **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: The PEA and MRE are signed off by multiple Qualified Persons \(QPs\) under NI 43-101. Evidence · text > The following persons are the Qualified Persons under NI 43-101 that are responsible for the PEA and have reviewed and approved the scientific and technical information contained in this news release: Martin Pittuck CEng, FGS, MIMMM\(QMR\), Leonardo de Freitas Leite, MSc, FAusIMM \(CP\), Liam MacNamara PhD, ACSM, MIMMM, Jamie Spiers, CEng MIMMM, David Carruth, CEng MICE IntPE, Colin Chapman, CEng MIMMM, Thiago Toussaint MSc, MBA, MAusIMM CP\(Env\). **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The PEA and underlying MRE are prepared in accordance with National Instrument 43-101. Evidence · text > Technical Report prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects **Open Pit Mining** Polarity: neutral Story-specific tag Definition: No canonical definition is currently available. Why it applies: The PEA envisages a conventional open pit mine using a truck and shovel operation. Evidence · text > Planalto will be developed as a conventional open pit mine, with processing via a conventional crushing and grinding circuit followed by froth flotation. **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The processing flowsheet incorporates a conventional semi-autogenous grinding mill followed by 2 ball mills. Evidence · text > A traditional copper flotation process flow sheet has been adopted, incorporating a conventional semi-autogenous grinding mill followed by 2 ball mills **Flotation Route** Polarity: neutral Story-specific tag Definition: No canonical definition is currently available. Why it applies: The processing method is froth flotation to produce a copper-gold concentrate. Evidence · text > conventional crushing and grinding circuit followed by froth flotation. **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: The copper recovery of 90.9% is strong for a flotation process. Evidence · text > average metallurgical recoveries of 90.9% for copper **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: The gold recovery of 51.1% is weak for a flotation process. Evidence · text > 51.1% for gold **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: The mineral resource estimate is reported above a disclosed cut-off grade of 0.16% CuEq. Evidence · text > reported above a cut-off grade of 0.16% CuEq **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: The MRE contains fresh rock domains only, with oxide mineralization excluded from the PEA. Evidence · text > The MRE contains fresh rock domains only, the oxide mineralization is not reported. Excluded from the PEA is processing of oxide mineralised material ## Extracted facts Stored fact records: 13. Some facts used in scoring do not have a stored record. ## Resource Estimates (11) ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-0) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:3e928fed5aff78bc169d - Deposit or zone: Main Mineralization #### Resource Data - Category: indicated - Tonnes: 47700000 - Grade: 0.53 - Grade Unit: % - Contained Metal: 253 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.56 - Metal Eq. Unit: % CuEq #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: This indicated resource provides a solid base for the PEA, with a good copper grade for the deposit type. - Positive factor: Good grade for a porphyry-style deposit - Positive factor: Forms part of the economic PEA Evidence · table > 0.53 Context: 47.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-1) Planalto Copper-Gold Project · gold #### Identity - Project: Planalto Copper-Gold Project - Commodity: gold - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:3e928fed5aff78bc169d - Deposit or zone: Main Mineralization #### Resource Data - Category: indicated - Tonnes: 47700000 - Grade: 0.06 - Grade Unit: g/t - Contained Metal: 92 - Contained Unit: koz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The gold grade is low but contributes as a valuable byproduct to the overall project economics. - Positive factor: Provides gold credits to the project economics Evidence · table > 0.06 Context: 47.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-2) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:3e928fed5aff78bc169d - Deposit or zone: Main Mineralization #### Resource Data - Category: indicated - Tonnes: 47700000 - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.56 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The copper equivalent grade provides a comprehensive view of the resource's value, with transparent calculation assumptions. - Positive factor: Provides a combined economic grade for the resource - Positive factor: Assumptions for calculation are disclosed Evidence · table > 0.56 Context: 47.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-3) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:1570ef4554ae736e8d5d - Deposit or zone: Main Mineralization #### Resource Data - Category: inferred - Tonnes: 77700000 - Grade: 0.51 - Grade Unit: % - Contained Metal: 396 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.54 - Metal Eq. Unit: % CuEq #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: This inferred resource adds substantial copper tonnage, but its speculative nature means higher risk. - Positive factor: Adds significant tonnage to the resource base - Positive factor: Good grade for inferred category - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.51 Context: 77.7 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-4) Planalto Copper-Gold Project · gold #### Identity - Project: Planalto Copper-Gold Project - Commodity: gold - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:1570ef4554ae736e8d5d - Deposit or zone: Main Mineralization #### Resource Data - Category: inferred - Tonnes: 77700000 - Grade: 0.06 - Grade Unit: g/t - Contained Metal: 149.9 - Contained Unit: koz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The gold content in this inferred resource provides additional value, but its classification adds uncertainty. - Positive factor: Contributes to gold credits - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.06 Context: 77.7 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-5) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:1570ef4554ae736e8d5d - Deposit or zone: Main Mineralization #### Resource Data - Category: inferred - Tonnes: 77700000 - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The copper equivalent grade for this inferred resource is good, but its classification means it's less certain. - Positive factor: Provides a combined economic grade for the resource - Positive factor: Assumptions for calculation are disclosed - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.54 Context: 77.7 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-6) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:9b670203f41a8dfef6c0 - Deposit or zone: Host Rock Mineralization #### Resource Data - Category: inferred - Tonnes: 76300000 - Grade: 0.2 - Grade Unit: % - Contained Metal: 153 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.22 - Metal Eq. Unit: % CuEq #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: This lower-grade inferred resource from host rock mineralization contributes to overall tonnage but at a lower quality and higher risk. - Positive factor: Adds to the overall resource base - Negative factor: Lower grade compared to main mineralization - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.2 Context: 76.3 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-7) Planalto Copper-Gold Project · gold #### Identity - Project: Planalto Copper-Gold Project - Commodity: gold - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:9b670203f41a8dfef6c0 - Deposit or zone: Host Rock Mineralization #### Resource Data - Category: inferred - Tonnes: 76300000 - Grade: 0.03 - Grade Unit: g/t - Contained Metal: 73.6 - Contained Unit: koz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The gold content in this lower-grade inferred resource is minimal and adds little to the project's value. - Positive factor: Provides some gold credits - Negative factor: Very low grade - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.03 Context: 76.3 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-8) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101, other - QP Signed: Yes - Qualified person names: Martin Pittuck, Leonardo de Freitas Leite, Liam MacNamara, Jamie Spiers, David Carruth, Colin Chapman, Thiago Toussaint - Resource group id: resource:9b670203f41a8dfef6c0 - Deposit or zone: Host Rock Mineralization #### Resource Data - Category: inferred - Tonnes: 76300000 - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2024-07-03 #### Metal Equivalent - Metal Eq. Grade: 0.22 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The copper equivalent grade for this lower-grade inferred resource is marginal, reflecting its lower quality and higher risk. - Positive factor: Adds to the overall resource base - Positive factor: Assumptions for calculation are disclosed - Negative factor: Lower grade compared to main mineralization - Negative factor: Inferred category carries higher geological risk Evidence · table > 0.22 Context: 76.3 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported ### Fact 10 [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-11) State #### Identity - Project: State - Region: brazil - Reported Region: Brazil - Ticker: LRA #### Resource scope - Estimate type: resource - Resource group id: resource:1eca36e03d12075f006c #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: Explicit resource disclosure recovered from source prose. Evidence · text > Whilst SRK considers this cut-off grade to be suitable for the PEA, the metal prices currently prevailing are higher which presents is an opportunity to use a lower cut-off grade when resource reporting and mine planning work evolve in the future. #### Tags used in scoring **Cut-off Lowered** Polarity: negative Definition: Cut-off grade reduced beyond the suspicious bound vs prior estimate — tonnage growth may be artificial inflation. Why it applies: Whilst SRK considers this cut-off grade to be suitable for the PEA, the metal prices currently prevailing are higher which presents is an opportunity to use a lower cut-off grade when resource reporting and mine planning work evolve in the future. Evidence · text > Whilst SRK considers this cut-off grade to be suitable for the PEA, the metal prices currently prevailing are higher which presents is an opportunity to use a lower cut-off grade when resource reporting and mine planning work evolve in the future. Context: State, Brazil **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-resource-facts-12) Brazil #### Identity - Project: Brazil - Region: peru - Reported Region: Peru - Ticker: LRA #### Resource scope - Estimate type: reserve - Resource group id: resource:d7132605c79db1b524fb #### Resource Data - Category: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: Explicit resource disclosure recovered from source prose. Evidence · text > This news release contains forward-looking information regarding future or estimated financial and operational performance under the PEA including: estimated initial capital, sustaining capital, operating, sustaining and other costs, closure costs, net present value, internal rate of return and payback; metals price assumptions; estimated gold and copper production; estimated processing rates, throughput, ore grades and recovery rates; estimated LoM; the potential for future MRE growth from drilling; the development of Planalto as a conventional open pit mine; the potential to process the oxide mineralized material and the economics thereof; whether or not current or future discoveries of copper-gold mineralization at Planalto will have sufficient economic merit to consider development; potential repeatability and improvements to the economic assumptions and/or to metallurgical recoveries used in the PEA and MRE in future studies; the potential to convert some or all of the MRE to mineral reserves through economic studies and the timing and results of any such studies; opportunities to use a lower cut-off grade in the future; the carbon intensity of any future operation; the results of subsequent stages of permitting, including but not limited to the timing, granting and conditions of the LP, LI and LO referred to herein; the outcomes of future economic studies and the Company's plans in respect thereof; the potential for tax exemptions under SUDAM; project opportunities including the reduction of required footprint areas for TSF development, oxide exploration and the processing of oxide mineralized material, further improvements to metallurgical recoveries and optimization of processing reagent consumption, and MRE growth potential and the potential to convert existing inferred resources to the indicated category. #### Tags used in scoring **Cut-off Lowered** Polarity: negative Definition: Cut-off grade reduced beyond the suspicious bound vs prior estimate — tonnage growth may be artificial inflation. Why it applies: This news release contains forward-looking information regarding future or estimated financial and operational performance under the PEA including: estimated initial capital, sustaining capital, operating, sustaining and other costs, closure costs, net present value, internal rate of return and payback; metals price assumptions; estimated gold and copper production; estimated processing rates, throughput, ore grades and recovery rates; estimated LoM; the potential for future MRE growth from drilling; the development of Planalto as a conventional open pit mine; the potential to process the oxide mineralized material and the economics thereof; whether or not current or future discoveries of copper-gold mineralization at Planalto will have sufficient economic merit to consider development; potential repeatability and improvements to the economic assumptions and/or to metallurgical recoveries used in the PEA and MRE in future studies; the potential to convert some or all of the MRE to mineral reserves through economic studies and the timing and results of any such studies; opportunities to use a lower cut-off grade in the future; the carbon intensity of any future operation; the results of subsequent stages of permitting, including but not limited to the timing, granting and conditions of the LP, LI and LO referred to herein; the outcomes of future economic studies and the Company's plans in respect thereof; the potential for tax exemptions under SUDAM; project opportunities including the reduction of required footprint areas for TSF development, oxide exploration and the processing of oxide mineralized material, further improvements to metallurgical recoveries and optimization of processing reagent consumption, and MRE growth potential and the potential to convert existing inferred resources to the indicated category. Evidence · text > This news release contains forward-looking information regarding future or estimated financial and operational performance under the PEA including: estimated initial capital, sustaining capital, operating, sustaining and other costs, closure costs, net present value, internal rate of return and payback; metals price assumptions; estimated gold and copper production; estimated processing rates, throughput, ore grades and recovery rates; estimated LoM; the potential for future MRE growth from drilling; the development of Planalto as a conventional open pit mine; the potential to process the oxide mineralized material and the economics thereof; whether or not current or future discoveries of copper-gold mineralization at Planalto will have sufficient economic merit to consider development; potential repeatability and improvements to the economic assumptions and/or to metallurgical recoveries used in the PEA and MRE in future studies; the potential to convert some or all of the MRE to mineral reserves through economic studies and the timing and results of any such studies; opportunities to use a lower cut-off grade in the future; the carbon intensity of any future operation; the results of subsequent stages of permitting, including but not limited to the timing, granting and conditions of the LP, LI and LO referred to herein; the outcomes of future economic studies and the Company's plans in respect thereof; the potential for tax exemptions under SUDAM; project opportunities including the reduction of required footprint areas for TSF development, oxide exploration and the processing of oxide mineralized material, further improvements to metallurgical recoveries and optimization of processing reagent consumption, and MRE growth potential and the potential to convert existing inferred resources to the indicated category. Context: Brazil, Peru **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports ## Metallurgical Results (2) ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-metallurgical-facts-9) Planalto Copper-Gold Project · copper #### Identity - Project: Planalto Copper-Gold Project - Commodity: copper - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: conventional crushing and grinding circuit followed by froth flotation - Sample: RoM mineralisation - Grind P80: 75 µm #### Recovery - Recovery: 90.9 % - Recovery Basis: actual\_test - Conc. Grade: 28 - Conc. Grade Unit: % #### Lab - Laboratory: Blue Coast Laboratories - Consultant: SRK Consulting \(UK\) Ltd and SRK Consultores do Brasil Ltda. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The high copper recovery is a strong positive for the project's economic viability. - Positive factor: High recovery for copper flotation - Positive factor: Supports project economics Evidence · text > average metallurgical recoveries of 90.9% for copper #### 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 ### flotation [Link to this fact](https://atlas-extractions.minestarters.com/news/lara-reports-results-of-preliminary-economic-assessment-for-its-planalto-copper--bfcf4cef-3e5a-4e5b-8aeb-ac0073facbda#fact-metallurgical-facts-10) Planalto Copper-Gold Project · gold #### Identity - Project: Planalto Copper-Gold Project - Commodity: gold - Region: brazil - Reported Region: Pará State, Brazil - Ticker: LRA #### Test Work - Program Status: preliminary - Test Type: flotation - Processing Route: conventional crushing and grinding circuit followed by froth flotation - Sample: RoM mineralisation - Grind P80: 75 µm #### Recovery - Recovery: 51.1 % - Recovery Basis: actual\_test #### Lab - Laboratory: Blue Coast Laboratories - Consultant: SRK Consulting \(UK\) Ltd and SRK Consultores do Brasil Ltda. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-21T00:00:00.000Z Reasoning: The low gold recovery is a negative factor, potentially limiting the value of gold as a byproduct. - Negative factor: Low recovery for gold flotation - Negative factor: May impact gold credits Evidence · text > 51.1% for gold #### 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: 51.1% is below the weak band \(80%\) ## 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.