Altamira Gold Announces Filing of NI 43-101 Technical Report for Maria Bonita Porphyry Gold Project, Cajueiro District, Brazil
Original announcement by tmx on
- 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
Analysis by Minestarters Atlas
Minestarters Atlas analysis
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 factors
- NI 43-101 compliant resource estimate
- Maiden resource filing
Negative factors
- Stale data re-release (resource was originally published May 5, 2025)
Facts used in scoring: 4
Classification and evidence
Maiden Resourceneutral
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-releasenegative · Story-specific tag
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 Compliantpositive
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)
indicatedCajueiro · goldTonnes: 5660000Grade: 1.02Grade Unit: g/tContained Metal: 185000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
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 factors
- Indicated category
Negative factors
- Previously reported
Evidence · text
“185,000 ounces of gold in the Indicated category (5.66Mt @ 1.02 g/t)”
inferredCajueiro · goldTonnes: 12660000Grade: 1.26Grade Unit: g/tContained Metal: 515000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
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 factors
- Significant tonnage
Negative factors
- Inferred category
Evidence · text
“515,000 ounces in the Inferred category (12.66Mt @ 1.26 g/t)”
indicatedMaria Bonita · goldTonnes: 24190000Grade: 0.46Grade Unit: g/tContained Metal: 357800Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
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 factors
- Indicated category
Negative factors
- Low grade
Evidence · text
“357,800 ounces of gold in the Indicated category (24.19 Mt @ 0.46g/t gold)”
inferredMaria Bonita · goldTonnes: 25640000Grade: 0.44Grade Unit: g/tContained Metal: 362400Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
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 factors
- Significant tonnage
Negative factors
- 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.