# Arc Mineral Royalties Notes Significant Resource Growth at Flagship Mt Henry Gold Project Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/arc-mineral-royalties-notes-significant-resource-growth-at-flagship-mt-henry-gol--5699eebd-2366-4be3-9c93-f103db6c2927 Original source: https://www.newsfilecorp.com/release/314292/Arc-Mineral-Royalties-Notes-Significant-Resource-Growth-at-Flagship-Mt-Henry-Gold-Project Publisher: newsfile Original announcement: 2026-09-15T13:30:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Arc Mineral Royalties Ltd. - Ticker: ARO - Exchange: Unavailable - Region: Western Australia - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update - Extracted: 2026-09-15 13:50:11 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Arc Mineral Royalties reports significant resource growth at the Mt Henry Gold Project, where the interim JORC resource has doubled to 1.8Moz gold. The update includes 33.9Mt at 1.2 g/t Au in the Measured and Indicated categories, with much of the resource located within 200m of the surface. Reasoning: The resource has approximately doubled in size to 1.8Moz, with a strong M&I component and favorable shallow geometry. - Positive factor: Significant tonnage and contained metal growth - Positive factor: High proportion of Measured and Indicated resources - Positive factor: Shallow nature of resource with open-pit potential - Positive factor: Conservative gold price assumptions used - Negative factor: Interim estimate only includes 41% of planned drilling Facts used in scoring: 3 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Total contained gold has approximately doubled from 0.9 million ounces to 1.8 million ounces. Evidence · text > Total contained gold has approximately doubled from the 0.9 million total ounces reported **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: The release states the technical information was reviewed and approved by Brian Wolfe, an independent Qualified Person. Evidence · text > reviewed and approved by Brian Wolfe, B.Sc., MAIG, Principal Consultant Geologist, an independent Qualified Person **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 resource is reported at a 0.5 g/t gold cut-off. Evidence · text > reported at a 0.5 g/t gold cut-off ## Extracted facts Stored fact records: 3. Some facts used in scoring do not have a stored record. ## Resource Estimates (3) ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/arc-mineral-royalties-notes-significant-resource-growth-at-flagship-mt-henry-gol--5699eebd-2366-4be3-9c93-f103db6c2927#fact-resource-facts-0) Mt Henry Gold Project · gold #### Identity - Project: Mt Henry Gold Project - Commodity: gold - Region: australia\_wa - Reported Region: Western Australia - Ticker: ARO #### Resource scope - Estimate type: resource - Reporting standards: jorc - QP Signed: Yes - Qualified person names: Brian Wolfe - Resource group id: resource:470e228b165b8a65ab47 - Deposit or zone: Mt Henry and Selene - Mining method: open\_pit - Resource basis: gross #### Resource Data - Category: measured - Tonnes: 900000 - Grade: 0.7 - Grade Unit: g/t - Contained Metal: 0.1 - Contained Unit: moz - Cutoff Grade: 0.5 - Cutoff Unit: g/t gold #### Prior Estimate - Resource Date: 2026-07-31 #### Location - Loc. Confidence: high #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-15T00:00:00.000Z Reasoning: Small measured component of the total resource. Evidence · table > 0.7 Context: 0.9 #### 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 **JORC Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with JORC Code \(Australia\) — high reporting standard. Why it applies: reporting\_standards includes jorc ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/arc-mineral-royalties-notes-significant-resource-growth-at-flagship-mt-henry-gol--5699eebd-2366-4be3-9c93-f103db6c2927#fact-resource-facts-1) Mt Henry Gold Project · gold #### Identity - Project: Mt Henry Gold Project - Commodity: gold - Region: australia\_wa - Reported Region: Western Australia - Ticker: ARO #### Resource scope - Estimate type: resource - Reporting standards: jorc - QP Signed: Yes - Qualified person names: Brian Wolfe - Resource group id: resource:e48e6caffa1660a02b82 - Deposit or zone: Mt Henry and Selene - Mining method: open\_pit - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 33000000 - Grade: 1.2 - Grade Unit: g/t - Contained Metal: 1.2 - Contained Unit: moz - Cutoff Grade: 0.5 - Cutoff Unit: g/t gold #### Prior Estimate - Resource Date: 2026-07-31 #### Location - Loc. Confidence: high #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-15T00:00:00.000Z Reasoning: Large indicated component driving the resource scale. Evidence · table > 1.2 Context: 33.0 #### 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 **JORC Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with JORC Code \(Australia\) — high reporting standard. Why it applies: reporting\_standards includes jorc ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/arc-mineral-royalties-notes-significant-resource-growth-at-flagship-mt-henry-gol--5699eebd-2366-4be3-9c93-f103db6c2927#fact-resource-facts-2) Mt Henry Gold Project · gold #### Identity - Project: Mt Henry Gold Project - Commodity: gold - Region: australia\_wa - Reported Region: Western Australia - Ticker: ARO #### Resource scope - Estimate type: resource - Reporting standards: jorc - QP Signed: Yes - Qualified person names: Brian Wolfe - Resource group id: resource:759af5bfc286128c39fe - Deposit or zone: Mt Henry and Selene - Mining method: open\_pit - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 14000000 - Grade: 1.2 - Grade Unit: g/t - Contained Metal: 0.5 - Contained Unit: moz - Cutoff Grade: 0.5 - Cutoff Unit: g/t gold #### Prior Estimate - Resource Date: 2026-07-31 #### Location - Loc. Confidence: high #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-15T00:00:00.000Z Reasoning: Significant inferred component adds scale but lower confidence. Evidence · table > 1.2 Context: 14.0 #### 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 **JORC Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with JORC Code \(Australia\) — high reporting standard. Why it applies: reporting\_standards includes jorc ## 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.