# Great Panther Announces Updated Mineral Reserve and Mineral Resource Estimates for the Tucano Gold Mine Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2 Original source: https://money.tmx.com/en/quote/GPR/news/5992960327929929/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f Publisher: tmx Original announcement: 2022-04-26T11:25:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Great Panther Mining Limited - Ticker: GPR - Exchange: TSX - Region: Brazil - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update, Other - Extracted: 2026-09-16 03:29:32 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Great Panther has released updated 2021 Mineral Reserve and Mineral Resource Estimates for the Tucano Gold Mine in Brazil. The update highlights a 24% increase in open pit reserves and a 65% increase in open pit Measured and Indicated resources compared to the 2020 estimate. Reasoning: The update shows significant growth in both open pit reserves and M&I resources, effectively extending mine life and replacing depletion. - Positive factor: Significant tonnage growth in open pit reserves \(+24%\) - Positive factor: Substantial M&I resource expansion \(+65%\) - Positive factor: Successful replacement of mining depletion - Positive factor: Increased mine life for open pit - Negative factor: Underground estimates pending engineering studies Facts used in scoring: 5 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Tonnage increase reaching the strong tier vs prior estimate, with grade maintained or improved. Why it applies: Open pit reserves increased by 24% since the 2020 MRMR. Evidence · text > a 24% increase in P&P open pit reserves since the previously reported MRMR estimate **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: Estimates were prepared in accordance with NI 43-101 standards. Evidence · text > prepared in accordance with National Instrument 43-101 **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: Release details QA/QC protocols including blanks, standards, duplicates, and certified laboratory use. Evidence · text > includes the regular insertion of blanks, standards and duplicates ## Extracted facts Stored fact records: 5. Some facts used in scoring do not have a stored record. ## Resource Estimates (5) ### proven [Link to this fact](https://atlas-extractions.minestarters.com/news/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2#fact-resource-facts-0) Tucano Gold Mine · gold #### Identity - Project: Tucano Gold Mine - Commodity: gold - Region: brazil - Reported Region: Brazil - Ticker: GPR #### Resource scope - Estimate type: reserve - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Fernando A. Cornejo, Nicholas Winer, Carlos Pires - Resource group id: resource:5ec471fb40da2ba3cda5 - Deposit or zone: Open pit - Mining method: combined - Material type: oxide #### Resource Data - Category: proven - Tonnes: 2495000 - Grade: 1.4 - Grade Unit: g/t - Contained Metal: 112000 - Contained Unit: oz - Cutoff Grade: 2.4 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2021-07-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2022-04-26T00:00:00.000Z Reasoning: Proven reserve component of the open pit. Evidence · table > 1.40 Context: 2,495 #### Tags used in scoring **Proven Reserve** Polarity: positive Definition: Measured Resource with demonstrated economic viability after applying modifying factors. Why it applies: category is "proven" **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 ### probable [Link to this fact](https://atlas-extractions.minestarters.com/news/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2#fact-resource-facts-1) Tucano Gold Mine · gold #### Identity - Project: Tucano Gold Mine - Commodity: gold - Region: brazil - Reported Region: Brazil - Ticker: GPR #### Resource scope - Estimate type: reserve - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Fernando A. Cornejo, Nicholas Winer, Carlos Pires - Resource group id: resource:6ef8c4b4fffcf328071d - Deposit or zone: Open pit - Mining method: combined - Material type: oxide #### Resource Data - Category: probable - Tonnes: 74371000 - Grade: 1.08 - Grade Unit: g/t - Contained Metal: 259000 - Contained Unit: oz - Cutoff Grade: 2.4 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2021-07-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2022-04-26T00:00:00.000Z Reasoning: Probable reserve component of the open pit. Evidence · table > 1.08 Context: 7,4371 #### Tags used in scoring **Probable Reserve** Polarity: positive Definition: Indicated Resource with demonstrated economic viability after applying modifying factors. Why it applies: category is "probable" **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 ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2#fact-resource-facts-2) Tucano Gold Mine · gold #### Identity - Project: Tucano Gold Mine - Commodity: gold - Region: brazil - Reported Region: Brazil - Ticker: GPR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Fernando A. Cornejo, Nicholas Winer, Carlos Pires - Resource group id: resource:86250ea51833a37112f6 - Deposit or zone: Open pit - Mining method: combined - Material type: oxide #### Resource Data - Category: measured - Tonnes: 5651000 - Grade: 1.2 - Grade Unit: g/t - Contained Metal: 217000 - Contained Unit: oz - Cutoff Grade: 2.4 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2021-07-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2022-04-26T00:00:00.000Z Reasoning: Measured resource component of the open pit. Evidence · table > 1.20 Context: 5,651 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **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/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2#fact-resource-facts-3) Tucano Gold Mine · gold #### Identity - Project: Tucano Gold Mine - Commodity: gold - Region: brazil - Reported Region: Brazil - Ticker: GPR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Fernando A. Cornejo, Nicholas Winer, Carlos Pires - Resource group id: resource:219d2925d0919ccb70a6 - Deposit or zone: Open pit - Mining method: combined - Material type: oxide #### Resource Data - Category: indicated - Tonnes: 18863000 - Grade: 1.17 - Grade Unit: g/t - Contained Metal: 711000 - Contained Unit: oz - Cutoff Grade: 2.4 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2021-07-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2022-04-26T00:00:00.000Z Reasoning: Indicated resource component of the open pit. Evidence · table > 1.17 Context: 18,863 #### 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 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/great-panther-announces-updated-mineral-reserve-and-mineral-resource-estimates-f--ee61b997-5a36-4466-ae8c-3af8641da7a2#fact-resource-facts-4) Tucano Gold Mine · gold #### Identity - Project: Tucano Gold Mine - Commodity: gold - Region: brazil - Reported Region: Brazil - Ticker: GPR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Fernando A. Cornejo, Nicholas Winer, Carlos Pires - Resource group id: resource:11ec334eb8e0028d3517 - Deposit or zone: Open pit - Mining method: combined - Material type: oxide #### Resource Data - Category: inferred - Tonnes: 1476000 - Grade: 1.1 - Grade Unit: g/t - Contained Metal: 52000 - Contained Unit: oz - Cutoff Grade: 2.4 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2021-07-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2022-04-26T00:00:00.000Z Reasoning: Inferred resource component of the open pit. - Negative factor: Inferred category implies limited geological confidence Evidence · table > 1.10 Context: 1,476 #### 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 ## 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.