# Cosa Reports Anomalous Uranium in Sandstone at Darby Joint Venture with Denison Mines Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison--f0faf5bf-7eca-46fb-8344-8dc8186289a4 Original source: https://money.tmx.com/en/quote/COSA/news/7788805743603155/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison- Publisher: tmx Original announcement: 2026-05-06T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Cosa Resources Corp. - Ticker: COSA - Exchange: TSX - Region: Saskatchewan - Primary commodity: Uranium - Secondary commodities: None reported - Document categories: Drill results - Extracted: 2026-09-13 18:52:16 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Cosa Resources reported significant uranium drilling results at the Darby project in Saskatchewan, including strongly anomalous sandstone uranium at the Charlie Trend. The program also intersected weak basement mineralization and upgraded the Gamma Trend, providing several high-priority follow-up targets. Reasoning: The drill program successfully intersected strongly anomalous uranium in sandstone and identified new basement mineralization, upgrading several key trends at the Darby project. - Positive factor: Strongly anomalous sandstone uranium content - Positive factor: Discovery of new basement mineralization - Positive factor: Upgraded geological trends - Negative factor: Geochemical results for DB26-42 still pending Facts used in scoring: 4 ## Classification and evidence **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: Release mentions verification of historical results and use of SRC for analytical certificates. Evidence · text > verification of geochemical results for drill holes completed between 2008 and 2010 was facilitated by the reissuance of analytical certificates to Cosa by the Saskatchewan Research Council \(SRC\). **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: Drilling at Charlie Trend followed up on historical anomalous sandstone uranium content. Evidence · text > DB26-39A followed up basement structure and anomalous 1 sandstone uranium content in historical drill hole DB-09 ## Extracted facts Stored fact records: 4. Some facts used in scoring do not have a stored record. ## Drill Results (4) ### DB26-39A [Link to this fact](https://atlas-extractions.minestarters.com/news/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison--f0faf5bf-7eca-46fb-8344-8dc8186289a4#fact-drill-facts-0) Darby · uranium #### Identity - Hole ID: DB26-39A - Project: Darby - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 5.6 - Grade Unit: ppm - Intercept: 103.5 m - From: 600 m - To: 703.5 m - Intercept Depth: 600 m #### Classification - Sample Type: drill - Group ID: DB26-39A:600-703.5 - Mining Method: unknown #### Location - Location: Charlie Trend - Loc. Source: document #### QA/QC - QP Signed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-05-06T00:00:00.000Z Reasoning: 5.6 ppm uranium in sandstone is classified as strongly anomalous by the company. - Positive factor: Strongly anomalous grade #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **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 ### DB26-39A [Link to this fact](https://atlas-extractions.minestarters.com/news/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison--f0faf5bf-7eca-46fb-8344-8dc8186289a4#fact-drill-facts-1) Darby · uranium #### Identity - Hole ID: DB26-39A - Project: Darby - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 9.5 - Grade Unit: ppm - Intercept: 53.5 m - From: 650 m - To: 703.5 m - Intercept Depth: 600 m #### Classification - Sample Type: drill - Group ID: DB26-39A:650-703.5 - Mining Method: unknown #### Location - Location: Charlie Trend - Loc. Source: document #### QA/QC - QP Signed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-05-06T00:00:00.000Z Reasoning: High-grade sub-interval within the main intercept. - Positive factor: High-grade sub-interval #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **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 ### DB26-39A [Link to this fact](https://atlas-extractions.minestarters.com/news/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison--f0faf5bf-7eca-46fb-8344-8dc8186289a4#fact-drill-facts-2) Darby · uranium #### Identity - Hole ID: DB26-39A - Project: Darby - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 0.04 - Grade Unit: % - Intercept: 0.5 m - From: 707.8 m - To: 708.3 m - Intercept Depth: 600 m #### Classification - Sample Type: drill - Group ID: DB26-39A:707.8-708.3 - Mining Method: unknown #### Location - Location: Charlie Trend - Loc. Source: document #### QA/QC - QP Signed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-05-06T00:00:00.000Z Reasoning: Identified as weak uranium mineralization in the basement. - Positive factor: New basement mineralization - Negative factor: Weak grade #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **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 ### DB-09 [Link to this fact](https://atlas-extractions.minestarters.com/news/cosa-reports-anomalous-uranium-in-sandstone-at-darby-joint-venture-with-denison--f0faf5bf-7eca-46fb-8344-8dc8186289a4#fact-drill-facts-3) Darby · uranium Historical result Needs review: historical\_restatement #### Identity - Hole ID: DB-09 - Project: Darby - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 2 - Grade Unit: ppm - Intercept: 116.8 m - From: 543.2 m - To: 660 m - Intercept Depth: 543.2 m #### Classification - Sample Type: drill - Group ID: DB-09:543.2-660 - Mining Method: unknown #### Location - Location: Charlie Trend - Loc. Source: document #### QA/QC - QP Signed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Interp. Status: scored - Historical: Yes #### Dates - Event date: 2026-05-06T00:00:00.000Z Reasoning: Historical intercept used for comparison. #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **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 **Stale Data Re-release** Polarity: negative Definition: Historical results re-announced with no new assays or reinterpretation — low genuine novelty. Why it applies: the fact restates a prior release ## 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.