# What Blue Rose Drill Core Says About Cobra's Porphyry Copper Model Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6 Original source: https://www.cruxinvestor.com/posts/what-blue-rose-drill-core-says-about-cobras-porphyry-copper-model Publisher: cruxinvestor Original announcement: 2026-10-02T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-02T12:33:52.904Z Atlas analysis updated: 2026-10-02T12:33:52.904Z - Company: Cobra Resources plc - Ticker: COBR - Exchange: Unavailable - Region: South Australia - Primary commodity: Copper - Secondary commodities: Gold, Molybdenum, Silver - Document categories: Drill results, Other - Extracted: 2026-10-02 12:33:53 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Cobra Resources reported diamond drilling assays from two of four holes at the Blue Rose prospect, confirming porphyry-style alteration and mineralization at depth. The results include a 12.4m intercept at 1.01% Cu and support the company's model of a larger porphyry system beneath shallow skarn mineralization. Reasoning: Diamond drilling results provide significant geological evidence supporting the porphyry copper model at depth, though half of the diamond assays are still pending. - Positive factor: diamond drilling confirms porphyry vectors \(potassic alteration, bornite, breccia\) - Positive factor: mineralization open beyond 300m downhole - Positive factor: strong copper grades in diamond core \(1.01% Cu\) - Positive factor: presence of molybdenum as a pathfinder - Negative factor: assays for 2 of 4 diamond holes are still pending - Negative factor: potassic alteration alone does not confirm copper due to model's copper-depleted zone Facts used in scoring: 10 ## Classification and evidence **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: Diamond drilling is testing a different part of the system \(deeper\) beneath the shallow skarn. Evidence · text > The company followed with diamond drilling beneath the skarn **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: The article discusses the Blue Rose prospect within the context of the Manna Hill project and its porphyry model. Evidence · text > Cobra Resources' diamond drilling at Blue Rose, within the Manna Hill project ## Extracted facts Stored fact records: 10. Some facts used in scoring do not have a stored record. ## Drill Results (10) ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-0) Manna Hill · copper Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: copper - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.63 - Grade Unit: % - Intercept: 23 m - From: 186 m - To: 209 m - Intercept Depth: 186 m #### Classification - Sample Type: drill - Group ID: unknown:186-209 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Solid copper grade in a key porphyry vector zone. - Positive factor: confirms copper-bearing zone in potassic alteration Evidence · text > returned 23 meters at 0.63% copper ... from 186 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-1) Manna Hill · gold Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: gold - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.09 - Grade Unit: g/t - Intercept: 23 m - From: 186 m - To: 209 m - Intercept Depth: 186 m #### Classification - Sample Type: drill - Group ID: unknown:186-209 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Trace gold associated with copper intercept. Evidence · text > 23 meters at 0.63% copper and 0.09 grams per tonne gold from 186 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-2) Manna Hill · copper Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: copper - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 1.01 - Grade Unit: % - Intercept: 12.4 m - From: 186 m - To: 198.4 m - Intercept Depth: 186 m #### Classification - Sample Type: drill - Group ID: unknown:186-198.4 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Strong grade within the main intercept. - Positive factor: high grade sub-interval Evidence · text > including 12.4 meters at 1.01% copper #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-3) Manna Hill · copper Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: copper - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.39 - Grade Unit: % - Intercept: 36 m - From: 232 m - To: 268 m - Intercept Depth: 232 m #### Classification - Sample Type: drill - Group ID: unknown:232-268 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Moderate grade intercept in a structural target. - Positive factor: associated with hydrothermal breccia Evidence · text > 36 meters at 0.39% copper ... from 232 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-4) Manna Hill · gold Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: gold - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.05 - Grade Unit: g/t - Intercept: 36 m - From: 232 m - To: 268 m - Intercept Depth: 232 m #### Classification - Sample Type: drill - Group ID: unknown:232-268 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Trace gold. Evidence · text > 36 meters at 0.39% copper and 0.05 grams per tonne gold from 232 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-5) Manna Hill · molybdenum Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: molybdenum - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.08 - Grade Unit: % - Intercept: 16.9 m - From: 335.5 m - To: 352.4 m - Intercept Depth: 335.5 m #### Classification - Sample Type: drill - Group ID: unknown:335.5-352.4 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Molybdenum enrichment in a breccia-related interval. - Positive factor: pathfinder element for porphyry Evidence · text > 16.9 meters at 0.08% molybdenum, within strongly altered wall rock in contact with the hydrothermal breccia #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-6) Manna Hill · copper Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: copper - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.78 - Grade Unit: % - Intercept: 20 m - From: 38 m - To: 58 m - Intercept Depth: 38 m #### Classification - Sample Type: drill - Group ID: unknown:38-58 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Shallow RC skarn intercept. Evidence · text > One hole returned 20 meters at 0.78% copper ... from 38 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-7) Manna Hill · gold Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: gold - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.13 - Grade Unit: g/t - Intercept: 20 m - From: 38 m - To: 58 m - Intercept Depth: 38 m #### Classification - Sample Type: drill - Group ID: unknown:38-58 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Trace gold in RC hole. Evidence · text > 20 meters at 0.78% copper and 0.13 grams per tonne gold from 38 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-8) Manna Hill · copper Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: copper - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 1.02 - Grade Unit: % - Intercept: 74 m - From: 70 m - To: 144 m - Intercept Depth: 70 m #### Classification - Sample Type: drill - Group ID: unknown:70-144 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Thick shallow skarn intercept. Evidence · text > 74 meters at 1.02% copper ... from 70 meters #### 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 ### unknown [Link to this fact](https://atlas-staging.minestarters.com/news/what-blue-rose-drill-core-says-about-cobra-s-porphyry-copper-model--ce9be503-7b82-483c-b2d2-555fcaa1b7b6#fact-drill-facts-9) Manna Hill · gold Needs review: ungrounded #### Identity - Hole ID: unknown - Project: Manna Hill - Commodity: gold - Region: australia\_sa - Reported Region: australia\_sa - Ticker: COBR #### Geometry - Grade: 0.25 - Grade Unit: g/t - Intercept: 74 m - From: 70 m - To: 144 m - Intercept Depth: 70 m #### Classification - Sample Type: drill - Group ID: unknown:70-144 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: ungrounded - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-10-02T00:00:00.000Z Reasoning: Trace gold in RC hole. Evidence · text > 74 meters at 1.02% copper and 0.25 grams per tonne gold from 70 meters #### 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.