# Cosa Announces Summer Drilling Results for Murphy Lake North Uranium Joint Venture with Denison Mines Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847 Original source: https://www.newsfilecorp.com/release/314119/Cosa-Announces-Summer-Drilling-Results-for-Murphy-Lake-North-Uranium-Joint-Venture-with-Denison-Mines Publisher: newsfile Original announcement: 2026-09-14T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Cosa Resources Corp. - Ticker: COSA - Exchange: Unavailable - Region: Saskatchewan - Primary commodity: Uranium - Secondary commodities: Nickel, Cobalt - Document categories: Drill results - Extracted: 2026-09-14 12:52:22 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Cosa Resources reported summer drilling results at the Murphy Lake North uranium project, highlighting structural and alteration continuity over a 650-metre strike length. While several holes intersected elevated radioactivity, full assay results for the summer program are pending, though winter results previously confirmed high-grade uranium mineralization. Reasoning: Summer drilling confirmed structural and alteration continuity along the Cyclone trend, with several holes showing elevated radioactivity and pathfinder enrichment \(Ni, Co\), though full assay results for the summer campaign are still pending. - Positive factor: structural continuity - Positive factor: elevated radioactivity - Positive factor: pathfinder element enrichment - Positive factor: strong treasury position - Negative factor: pending assay results for summer program Facts used in scoring: 9 ## 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 use of CRM blanks and standards, and SRC laboratory accreditation. Evidence · text > Cosa inserts certified reference material \(CRM\) blanks and standards into the split core sample series as a QA/QC measure. **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: Summer drilling followed up on winter results at the Cyclone trend. Evidence · text > The 13-hole, 6,752 metre drill program followed up winter results at the Cyclone trend ## Extracted facts Stored fact records: 9. Some facts used in scoring do not have a stored record. ## Drill Results (9) ### MLN26-013 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-0) Murphy Lake North · uranium Historical result Needs review: historical\_restatement #### Identity - Hole ID: MLN26-013 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 0.55 - Grade Unit: % - Intercept: 5 m - From: 308.5 m - To: 313.5 m - Intercept Depth: 308.5 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-013:308.5-313.5 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Interp. Status: scored - Historical: Yes #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: High-grade winter intercept reported as a reference point. - Positive factor: high grade Evidence · text > 5.0 metres averaging 0.55% U 3 O 8 \(308.5-313.5 metres\) in MLN26-013 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-013 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-1) Murphy Lake North · uranium Historical result Needs review: historical\_restatement #### Identity - Hole ID: MLN26-013 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Grade: 1.7 - Grade Unit: % - Intercept: 0.5 m - From: 310.5 m - To: 311 m - Intercept Depth: 310.5 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-013:310.5-311 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Interp. Status: scored - Historical: Yes #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: High-grade sub-interval from winter program. - Positive factor: bonanza grade Evidence · text > 0.5 metre subinterval of 1.70% U 3 O 8 \(310.5-311.0 metres\) #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-018A [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-2) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-018A - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.2 m - From: 351 m - To: 351.2 m - Intercept Depth: 351 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-018A:351-351.2 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 315 Context: 0.2 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-024 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-3) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-024 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.1 m - From: 327.4 m - To: 327.5 m - Intercept Depth: 327.4 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-024:327.4-327.5 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 250 Context: 0.1 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-026 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-4) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-026 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.5 m - From: 336.5 m - To: 337 m - Intercept Depth: 336.5 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-026:336.5-337 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 340 Context: 0.5 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-026 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-5) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-026 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.4 m - From: 379.2 m - To: 379.6 m - Intercept Depth: 379.2 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-026:379.2-379.6 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 340 Context: 0.4 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-027 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-6) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-027 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.1 m - From: 348.2 m - To: 348.3 m - Intercept Depth: 348.2 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-027:348.2-348.3 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 320 Context: 0.1 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-029 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-7) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-029 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.1 m - From: 360.9 m - To: 361 m - Intercept Depth: 360.9 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-029:360.9-361 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 275 Context: 0.1 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ### MLN26-030 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--2be7d800-929f-4710-8957-5940b2b7b847#fact-drill-facts-8) Murphy Lake North · uranium #### Identity - Hole ID: MLN26-030 - Project: Murphy Lake North - Commodity: uranium - Region: canada\_sk - Reported Region: canada\_sk - Ticker: COSA #### Geometry - Intercept: 0.3 m - From: 348.7 m - To: 349 m - Intercept Depth: 348.7 m #### Classification - Program: mixed - Sample Type: drill - Group ID: MLN26-030:348.7-349 #### QA/QC - QA/QC Disclosed: Yes - QP Signed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Radioactivity reported via handheld spectrometer; assays pending. Evidence · table > 300 Context: 0.3 #### Tags used in scoring **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: qaqc\_disclosed is 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 **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: drill\_program\_type is "mixed" ## 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.