# Altamira Gold Welcomes Leading Authority on Porphyry Deposits Dr. Richard Sillitoe as Technical Advisor Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/altamira-gold-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito--91323627-6b22-4e54-82ae-7c5f03dfde30 Original source: https://money.tmx.com/en/quote/ALTA/news/8522437985540748/altamira-gold-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito Publisher: tmx Original announcement: 2025-12-03T12:30:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Altamira Gold Corp. - Ticker: ALTA - Exchange: TSX - Region: Brazil - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update, Other - Extracted: 2026-08-21 04:05:22 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Altamira Gold has appointed Dr. Richard Sillitoe, a leading authority on porphyry systems, as a technical advisor for its Cajueiro Porphyry Gold District in Brazil. The company also provided an update on ongoing diamond drilling at the Maria Bonita and Cajueiro Central deposits and restated its existing NI 43-101 mineral resources. Reasoning: The announcement combines a high-profile technical advisor appointment with a summary of existing mineral resources and an update on active drilling. - Positive factor: Appointment of world-renowned porphyry expert Dr. Richard Sillitoe - Positive factor: Ongoing drilling at two deposits - Positive factor: Established NI 43-101 resources at Cajueiro and Maria Bonita Facts used in scoring: 4 ## Classification and evidence **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: Guillermo Hughes, FAIG and M Aus IMM., is named as the Qualified Person supervising the technical information. Evidence · text > Qualified Person Guillermo Hughes, FAIG and M Aus IMM., a consultant to the Company as well as a Qualified Person as defined by National Instrument 43-101, supervised and approved the preparation of the technical information **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 estimates are explicitly stated as NI 43-101 compliant. Evidence · text > The central area comprises NI 43-101 resources ## 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-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito--91323627-6b22-4e54-82ae-7c5f03dfde30#fact-resource-facts-0) Cajueiro Central · gold #### Identity - Project: Cajueiro Central - 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: No - Historical: No #### Dates - Event date: 2025-12-03T00:00:00.000Z Reasoning: Indicated resource component of the Cajueiro Central deposit. Evidence · text > The central area comprises NI 43-101 resources of 5.66Mt @ 1.02 g/t gold for a total of 185,000 oz in the Indicated Resource category ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito--91323627-6b22-4e54-82ae-7c5f03dfde30#fact-resource-facts-1) Cajueiro Central · gold #### Identity - Project: Cajueiro Central - 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: No - Historical: No #### Dates - Event date: 2025-12-03T00:00:00.000Z Reasoning: Inferred resource component of the Cajueiro Central deposit. Evidence · text > 12.66Mt @ 1.26 g/t gold for a total of 515,000oz in the Inferred Resource category ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito--91323627-6b22-4e54-82ae-7c5f03dfde30#fact-resource-facts-2) Maria Bonita · gold #### 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: No - Historical: No #### Dates - Event date: 2025-12-03T00:00:00.000Z Reasoning: Indicated resource component of the Maria Bonita deposit. Evidence · text > Maria Bonita gold deposit comprises additional open pit Indicated Resources of 24.19Mt @ 0.46g/t for a total of 357,800oz ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/altamira-gold-welcomes-leading-authority-on-porphyry-deposits-dr-richard-sillito--91323627-6b22-4e54-82ae-7c5f03dfde30#fact-resource-facts-3) Maria Bonita · gold #### 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: No - Historical: No #### Dates - Event date: 2025-12-03T00:00:00.000Z Reasoning: Inferred resource component of the Maria Bonita deposit. Evidence · text > and Inferred Resources of 25.64Mt @ 0.44g/t for a total of 362,400oz ## 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.