# Altamira Gold Announces Filing of NI 43-101 Technical Report for Maria Bonita Porphyry Gold Project, Cajueiro District, Brazil Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po--b20807a1-3eaf-4888-8ea8-d87a34337f12 Original source: https://money.tmx.com/en/quote/ALTA/news/4544056946066071/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po Publisher: tmx Original announcement: 2025-06-19T15:16:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Altamira Gold Corp. - Ticker: ALTA - Exchange: TSX - Region: Brazil - Primary commodity: Gold - Secondary commodities: Copper - Document categories: Resource update, Other - Extracted: 2026-08-21 07:58:48 UTC Narrative sentiment: 0.10 · Bullish ## Minestarters Atlas summary Altamira Gold Corp. has filed a NI 43-101 technical report for the maiden resource estimate at the Maria Bonita porphyry gold project in Brazil. The report confirms the resource figures previously released in May 2025 with no material differences. Reasoning: The announcement is a formal filing of a technical report for a maiden resource estimate previously announced in May 2025; it provides no new resource numbers but confirms regulatory compliance. - Positive factor: NI 43-101 compliant resource estimate - Positive factor: Maiden resource filing - Negative factor: Stale data re-release \(resource was originally published May 5, 2025\) 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. Why it applies: The report is for the maiden resource estimate for the Maria Bonita porphyry gold deposit. Evidence · text > filed a National Instrument 43-101 technical report \(the " Report" \) on the maiden resource estimate **Stale Data Re-release** Polarity: negative Story-specific tag Definition: Historical results re-announced with no new assays or reinterpretation — low genuine novelty. Why it applies: The resource was originally published in a press release on May 5, 2025. Evidence · text > The maiden resource was originally published in a press release on May 5, 2025 **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The company filed a formal NI 43-101 technical report. Evidence · text > filed a National Instrument 43-101 technical report ## 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-staging.minestarters.com/news/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po--b20807a1-3eaf-4888-8ea8-d87a34337f12#fact-resource-facts-0) Cajueiro · gold Historical result Needs review: historical\_restatement #### Identity - Project: Cajueiro - Commodity: gold - Ticker: ALTA #### Resource Data - Category: indicated - Tonnes: 5660000 - Grade: 1.02 - Grade Unit: g/t - Contained Metal: 185000 - Contained Unit: oz #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2025-05-05T00:00:00.000Z #### Dates - Event date: 2025-06-19T00:00:00.000Z Reasoning: Indicated gold resource at Cajueiro Central Area. - Positive factor: Indicated category - Negative factor: Previously reported Evidence · text > 185,000 ounces of gold in the Indicated category \(5.66Mt @ 1.02 g/t\) ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po--b20807a1-3eaf-4888-8ea8-d87a34337f12#fact-resource-facts-1) Cajueiro · gold Historical result Needs review: historical\_restatement #### Identity - Project: Cajueiro - Commodity: gold - Ticker: ALTA #### Resource Data - Category: inferred - Tonnes: 12660000 - Grade: 1.26 - Grade Unit: g/t - Contained Metal: 515000 - Contained Unit: oz #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2025-05-05T00:00:00.000Z #### Dates - Event date: 2025-06-19T00:00:00.000Z Reasoning: Inferred gold resource at Cajueiro Central Area. - Positive factor: Significant tonnage - Negative factor: Inferred category Evidence · text > 515,000 ounces in the Inferred category \(12.66Mt @ 1.26 g/t\) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po--b20807a1-3eaf-4888-8ea8-d87a34337f12#fact-resource-facts-2) Maria Bonita · gold Historical result Needs review: historical\_restatement #### Identity - Project: Maria Bonita - Commodity: gold - Ticker: ALTA #### Resource Data - Category: indicated - Tonnes: 24190000 - Grade: 0.46 - Grade Unit: g/t - Contained Metal: 357800 - Contained Unit: oz #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2025-05-05T00:00:00.000Z #### Dates - Event date: 2025-06-19T00:00:00.000Z Reasoning: Indicated gold resource at Maria Bonita area. - Positive factor: Indicated category - Negative factor: Low grade Evidence · text > 357,800 ounces of gold in the Indicated category \(24.19 Mt @ 0.46g/t gold\) ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-announces-filing-of-ni-43-101-technical-report-for-maria-bonita-po--b20807a1-3eaf-4888-8ea8-d87a34337f12#fact-resource-facts-3) Maria Bonita · gold Historical result Needs review: historical\_restatement #### Identity - Project: Maria Bonita - Commodity: gold - Ticker: ALTA #### Resource Data - Category: inferred - Tonnes: 25640000 - Grade: 0.44 - Grade Unit: g/t - Contained Metal: 362400 - Contained Unit: oz #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2025-05-05T00:00:00.000Z #### Dates - Event date: 2025-06-19T00:00:00.000Z Reasoning: Inferred gold resource at Maria Bonita area. - Positive factor: Significant tonnage - Negative factor: Inferred category Evidence · text > 362,400 ounces gold in the Inferred category \(25.64 Mt @ 0.44g/t gold\) ## 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.