# Selkirk Copper Expands Minto Resource Ahead of Mid-2026 Economic Study Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb Original source: https://www.cruxinvestor.com/posts/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study Publisher: cruxinvestor Original announcement: 2026-08-07T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Selkirk Copper Mines - Ticker: SCMI - Exchange: Unavailable - Region: central Yukon, Canada - Primary commodity: Copper - Secondary commodities: Gold, Silver - Document categories: Resource update - Extracted: 2026-08-20 18:31:56 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Selkirk Copper has released an updated Minto mineral resource estimate, significantly increasing M&I copper metal by 182% and total tonnage by 280% compared to the 2025 estimate. The updated resource of 47.8 Mt at 0.89% Cu, 0.34 g/t Au, and 3.2 g/t Ag will support a preliminary economic assessment due in mid-2026. Reasoning: The update shows massive scale expansion in copper and tonnage, driven by both drilling and improved economic assumptions, despite a grade dilution. - Positive factor: Significant tonnage growth \(280%\) - Positive factor: Substantial copper metal growth \(182%\) - Positive factor: Expansion of existing lenses and definition of new ones - Positive factor: Supports upcoming PEA - Negative factor: Average grade decline \(1.20% to 0.89% Cu\) Facts used in scoring: 6 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Total M&I tonnage rose 280% vs the 2025 estimate. Evidence · text > total M&I tonnage rose 280% **Grade Decline** Polarity: negative Definition: Average grade dropped >5% vs prior estimate — deposit economics worsening. May indicate high-grading in early drilling. Why it applies: Average copper grade fell from 1.20% to 0.89%. Evidence · text > the average grade fell from 1.20% copper to 0.89% copper **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: M&I copper rose 182% over the 2025 estimate. Evidence · text > M&I copper rose 182% over the 2025 estimate **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: The estimate feeds a preliminary economic assessment \(PEA\) targeted for mid-2026. Evidence · text > The estimate feeds a preliminary economic assessment \(PEA\) targeted for mid-2026 ## Extracted facts Stored fact records: 6. Some facts used in scoring do not have a stored record. ## Resource Estimates (6) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-0) copper #### Identity - Commodity: copper - Ticker: SCMI #### Resource Data - Category: indicated - Tonnes: 47800000 - Grade: 0.89 - Grade Unit: % - Contained Metal: 940000000 - Contained Unit: pounds #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Significant metal and tonnage growth despite grade dilution. - Positive factor: 182% increase in copper metal vs 2025 - Negative factor: Grade decline from 1.20% to 0.89% Evidence · text > M&I resources reached 47.8 million tonnes containing 940 million pounds of copper, 530,000 ounces of gold, and 4.97 million ounces of silver. ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-1) gold #### Identity - Commodity: gold - Ticker: SCMI #### Resource Data - Category: indicated - Tonnes: 47800000 - Grade: 0.34 - Grade Unit: g/t - Contained Metal: 530000 - Contained Unit: ounces #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Part of the expanded M&I resource package. Evidence · text > 47.8 million tonnes of M&I resources grading 0.89% copper, 0.34 grams per tonne \(g/t\) gold, and 3.2 g/t silver. ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-2) silver #### Identity - Commodity: silver - Ticker: SCMI #### Resource Data - Category: indicated - Tonnes: 47800000 - Grade: 3.2 - Grade Unit: g/t - Contained Metal: 4970000 - Contained Unit: ounces #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Part of the expanded M&I resource package. Evidence · text > 47.8 million tonnes of M&I resources grading 0.89% copper, 0.34 grams per tonne \(g/t\) gold, and 3.2 g/t silver. ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-3) copper #### Identity - Commodity: copper - Ticker: SCMI #### Resource Data - Category: inferred - Tonnes: 16900000 - Grade: 0.76 - Grade Unit: % - Contained Metal: 281000000 - Contained Unit: pounds #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Significant inferred resource providing exploration upside. Evidence · text > Minto holds 16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver. ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-4) gold #### Identity - Commodity: gold - Ticker: SCMI #### Resource Data - Category: inferred - Tonnes: 16900000 - Contained Metal: 142000 - Contained Unit: ounces #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Part of the inferred resource package. Evidence · text > 16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver. ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/selkirk-copper-expands-minto-resource-ahead-of-mid-2026-economic-study--7e8be199-b185-4827-9694-18bff1943bdb#fact-resource-facts-5) silver #### Identity - Commodity: silver - Ticker: SCMI #### Resource Data - Category: inferred - Tonnes: 16900000 - Contained Metal: 1500000 - Contained Unit: ounces #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-07T00:00:00.000Z Reasoning: Part of the inferred resource package. Evidence · text > 16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver. ## 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.