# 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--8e1ac95e-8f54-4da0-9d9d-d484c4479c00 Original source: https://money.tmx.com/en/quote/COSA/news/8563028022242076/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu Publisher: tmx Original announcement: 2026-09-14T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-21T14:22:04.200Z Atlas analysis updated: 2026-09-21T14:22:04.200Z - Company: Cosa Resources Corp. - Ticker: COSA - Exchange: TSX - Region: Saskatchewan - Primary commodity: Uranium - Secondary commodities: Nickel, Cobalt - Document categories: Drill results - Extracted: 2026-09-21 14:22:04 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Cosa Resources has announced summer drilling results from the Murphy Lake North project, highlighting multiple zones of structural alteration and elevated radioactivity. While full assays are pending for most holes, the program confirmed the extension of the Cyclone trend and identified pathfinder element enrichment \(Ni, Co\) in basement alteration zones. Reasoning: Summer drilling confirmed structural continuity and elevated radioactivity across a 650m strike length, though most holes await full assay confirmation. - Positive factor: structural continuity confirmed - Positive factor: elevated radioactivity in multiple holes - Positive factor: pathfinder element enrichment \(Ni, Co\) noted - Positive factor: significant open space along strike - Negative factor: pending assay results for most summer holes - Negative factor: some holes undershot unconformity targets Facts used in scoring: 2 ## 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 SRC lab, use of blanks and standards, and QP sign-off by Andy Carmichael. Evidence · text > Cosa inserts certified reference material \(CRM\) blanks and standards into the split core sample series as a QA/QC measure. **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: Drilling confirmed mineralization is contained within a much larger zone than previously recognized and remains open along strike. Evidence · text > mineralization intersected during the winter drill program is contained within a much larger zone of structure and alteration than previously recognized ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Drill Results (2) ### MLN26-013 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--8e1ac95e-8f54-4da0-9d9d-d484c4479c00#fact-drill-facts-0) Murphy Lake North · uranium #### 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 - Sample Type: drill - Group ID: MLN26-013:308.5-313.5 #### QA/QC - Laboratory: SRC Geoanalytical Laboratories \(SRC\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: Significant uranium intercept confirming the Cyclone trend. - Positive factor: strong grade for uranium 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 ### MLN26-013 [Link to this fact](https://atlas-staging.minestarters.com/news/cosa-announces-summer-drilling-results-for-murphy-lake-north-uranium-joint-ventu--8e1ac95e-8f54-4da0-9d9d-d484c4479c00#fact-drill-facts-1) Murphy Lake North · uranium #### 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 - Sample Type: drill - Group ID: MLN26-013:310.5-311 #### QA/QC - Laboratory: SRC Geoanalytical Laboratories \(SRC\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-14T00:00:00.000Z Reasoning: High-grade sub-interval within the main intercept. - Positive factor: high-grade sub-interval 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 ## 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.