# McEwen Files NI 43-101 Technical Report for the Tartan Mine Project in Manitoba Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/mcewen-files-ni-43-101-technical-report-for-the-tartan-mine-project-in-manitoba--d10b2c05-6a1f-4296-bd02-b1e99c727ce3 Original source: https://money.tmx.com/en/quote/MUX/news/8704916535812429/mcewen-files-ni-43-101-technical-report-for-the-tartan-mine-project-in-manitoba Publisher: tmx Original announcement: 2026-05-04T21:57:20.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: McEwen Inc. - Ticker: MUX - Exchange: TSX - Region: Manitoba - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Resource update, Other - Extracted: 2026-09-12 14:58:58 UTC Narrative sentiment: 0.00 · Neutral ## Minestarters Atlas summary McEwen Inc. has filed an NI 43-101 Technical Report for the Tartan Mine Project in Manitoba. The report supports the mineral resource estimate previously announced on March 23, 2026. Reasoning: The document is a filing of a technical report supporting a previously announced resource estimate; it contains no new assay or tonnage data. - Positive factor: NI 43-101 compliant technical report filed - Positive factor: QA/QC protocols verified by independent review Facts used in scoring: 2 ## Classification and evidence **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The technical report was prepared in accordance with NI 43-101 standards. Evidence · text > prepared in accordance with National Instrument 43-101 **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The report includes verification of QA/QC protocols, including blanks and certified reference materials. Evidence · text > examining QA/QC protocols and results from the submission of blank and certified reference materials **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 figures are a restatement of those previously announced on March 23, 2026. Evidence · text > previously announced on March 23, 2026 ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Resource Estimates (2) ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/mcewen-files-ni-43-101-technical-report-for-the-tartan-mine-project-in-manitoba--d10b2c05-6a1f-4296-bd02-b1e99c727ce3#fact-resource-facts-0) Tartan Mine Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Tartan Mine Project - Commodity: gold - Region: canada\_mb - Reported Region: Manitoba - Ticker: MUX #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Terre Lane, Hamid Samari, Dr. Todd Harvey, Larry Breckenridge - Resource group id: resource:81139202d207d37a1f2c #### Resource Data - Category: indicated - Tonnes: 2619000 - Grade: 3.67 - Grade Unit: g/t - Contained Metal: 308900 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-12-31 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-03-23T00:00:00.000Z #### Dates - Event date: 2026-05-04T00:00:00.000Z Reasoning: Indicated resource restatement of previously announced data. Evidence · text > Indicated Resources of 2,619,000 tonnes at 3.67 g/t Au for 308,900 ounces of gold #### 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/mcewen-files-ni-43-101-technical-report-for-the-tartan-mine-project-in-manitoba--d10b2c05-6a1f-4296-bd02-b1e99c727ce3#fact-resource-facts-1) Tartan Mine Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Tartan Mine Project - Commodity: gold - Region: canada\_mb - Reported Region: Manitoba - Ticker: MUX #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Terre Lane, Hamid Samari, Dr. Todd Harvey, Larry Breckenridge - Resource group id: resource:ef01c4afecdeb933a8b4 #### Resource Data - Category: inferred - Tonnes: 2832900 - Grade: 3.32 - Grade Unit: g/t - Contained Metal: 302700 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-12-31 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-03-23T00:00:00.000Z #### Dates - Event date: 2026-05-04T00:00:00.000Z Reasoning: Inferred resource restatement of previously announced data. Evidence · text > Inferred Resources of 2,832,900 tonnes at 3.32 g/t Au for 302,700 ounces of gold #### 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 ## 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.