# Altamira Gold Announces Maiden Mineral Resource Estimate for Maria Bonita Porphyry Gold Project, Cajueiro District, Brazil Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy--bde3eae6-a252-438d-9cc8-b101f5a5af1e Original source: https://money.tmx.com/en/quote/ALTA/news/5268310211793601/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy Publisher: tmx Original announcement: 2025-05-05T10:30:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Altamira Gold Corp. - Ticker: ALTA - Exchange: TSX - Region: Mato Grosso, Brazil - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update, Drill results - Extracted: 2026-09-13 12:02:19 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Altamira Gold Corp. has announced a maiden mineral resource estimate for the Maria Bonita porphyry gold project in Brazil. The resource includes 24.19Mt of Indicated and 25.64Mt of Inferred resources at 0.46 g/t and 0.44 g/t gold respectively, based on a 0.2 g/t Au cut-off. Reasoning: The announcement of a maiden mineral resource for a new porphyry target \(Maria Bonita\) that doubles the company's resource base is a highly material and novel development. - Positive factor: Maiden resource establishes a new significant asset - Positive factor: High-grade near-surface saprolite component identified - Positive factor: Deposit remains open to the west, south and at depth - Positive factor: Significant district-scale potential with 8 additional targets Facts used in scoring: 4 ## Classification and evidence **Maiden Resource** Polarity: neutral Definition: First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. No prior estimate exists, so every change band is not applicable. Why it applies: The announcement is for the first formal mineral resource estimate for the Maria Bonita deposit. Evidence · text > maiden mineral resource estimate for the Maria Bonita porphyry gold deposit **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The resource estimate was prepared in accordance with NI 43-101 standards and supervised by a QP. Evidence · text > All Inferred Resources and Indicated Resources are defined in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum Definition Standards for Mineral Resources and Mineral Reserves \(2014\) \(the "CIM Standards"\). **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: Volodymyr Myadzel, PhD, MAIG is named as the Qualified Person supervising the preparation. Evidence · text > Qualified Person Volodymyr Myadzel, PhD, MAIG, a consultant to the Company as well as a Qualified Person as defined by National Instrument 43-101, supervised the preparation **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 cut-off grade of 0.2 g/t gold is explicitly stated for the resource estimation. Evidence · text > These resources were calculated using a 0.2 g/t gold cut-off grade. ## Extracted facts Stored fact records: 4. Some facts used in scoring do not have a stored record. ## Resource Estimates (4) ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy--bde3eae6-a252-438d-9cc8-b101f5a5af1e#fact-resource-facts-0) Cajueiro Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Cajueiro Project - Commodity: gold - Region: brazil - Reported Region: Mato Grosso, Brazil - Ticker: ALTA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Volodymyr Myadzel - Resource group id: resource:228ebdd60076bf0496d9 - Deposit or zone: Maria Bonita - Mining method: open\_pit - Material type: fresh #### Resource Data - Category: indicated - Tonnes: 24190000 - Grade: 0.46 - Grade Unit: g/t - Contained Metal: 357800 - Contained Unit: oz - Cutoff Grade: 0.2 - Cutoff Unit: g/t Au #### Lab - Laboratory: SGS #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2025-05-05T00:00:00.000Z Reasoning: Indicated resource for a new maiden porphyry target. - Positive factor: Maiden resource Evidence · text > total Indicated Resources of 24.19Mt @ 0.46g/t gold \(for a total of 357,800oz\) #### 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/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy--bde3eae6-a252-438d-9cc8-b101f5a5af1e#fact-resource-facts-1) Cajueiro Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Cajueiro Project - Commodity: gold - Region: brazil - Reported Region: Mato Grosso, Brazil - Ticker: ALTA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Volodymyr Myadzel - Resource group id: resource:a8dd28ed839dfdfe6166 - Deposit or zone: Maria Bonita - Mining method: open\_pit - Material type: fresh #### Resource Data - Category: inferred - Tonnes: 25640000 - Grade: 0.44 - Grade Unit: g/t - Contained Metal: 362400 - Contained Unit: oz - Cutoff Grade: 0.2 - Cutoff Unit: g/t Au #### Lab - Laboratory: SGS #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2025-05-05T00:00:00.000Z Reasoning: Inferred resource for a new maiden porphyry target. - Positive factor: Maiden resource - Negative factor: Inferred category Evidence · text > Total Inferred Resources of 25.64Mt @ 0.44g/t gold \(for a total of 362,400oz\) #### 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 ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy--bde3eae6-a252-438d-9cc8-b101f5a5af1e#fact-resource-facts-2) Cajueiro Project · gold #### Identity - Project: Cajueiro Project - Commodity: gold - Region: brazil - Reported Region: Mato Grosso, Brazil - Ticker: ALTA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Volodymyr Myadzel - Resource group id: resource:218ef09e563ac07c1387 - Deposit or zone: Maria Bonita saprolite - Mining method: open\_pit - Material type: saprolite #### Resource Data - Category: indicated - Tonnes: 2020000 - Grade: 0.59 - Grade Unit: g/t - Contained Metal: 38000 - Contained Unit: oz - Cutoff Grade: 0.2 - Cutoff Unit: g/t Au #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-05-05T00:00:00.000Z Reasoning: Indicated saprolite resource component. - Positive factor: Higher grade near-surface saprolite Evidence · text > near-surface saprolite Indicated Resources of 2,02Mt @ 0.59g/t gold \(for a total of 38,000oz\) #### 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/altamira-gold-announces-maiden-mineral-resource-estimate-for-maria-bonita-porphy--bde3eae6-a252-438d-9cc8-b101f5a5af1e#fact-resource-facts-3) Cajueiro Project · gold #### Identity - Project: Cajueiro Project - Commodity: gold - Region: brazil - Reported Region: Mato Grosso, Brazil - Ticker: ALTA #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Volodymyr Myadzel - Resource group id: resource:665b8b354bf87a800a26 - Deposit or zone: Maria Bonita saprolite - Mining method: open\_pit - Material type: saprolite #### Resource Data - Category: inferred - Tonnes: 680000 - Grade: 0.4 - Grade Unit: g/t - Contained Metal: 8700 - Contained Unit: oz - Cutoff Grade: 0.2 - Cutoff Unit: g/t Au #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-05-05T00:00:00.000Z Reasoning: Inferred saprolite resource component. - Negative factor: Inferred category Evidence · text > Inferred Resources of 0.68t @ 0.40g/t gold \(for a total of 8,700oz\) #### 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.