# RareX adds copper to Niobe mix with broad sulphide zone Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/rarex-adds-copper-to-niobe-mix-with-broad-sulphide-zone--e12a003d-7fcd-4d27-8458-8772643865bf Original source: https://stockhead.com.au/resources/rarex-adds-copper-to-niobe-mix-with-broad-sulphide-zone/ Publisher: stockhead Original announcement: 2026-09-21T01:18:58.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: RareX - Ticker: REE - Exchange: Unavailable - Region: Western Australia - Primary commodity: Copper - Secondary commodities: Gallium, Niobium, Rare earths - Document categories: Drill results, Other - Extracted: 2026-09-21 05:02:02 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary RareX has identified a new copper opportunity at its Niobe prospect in Western Australia after drilling intersected a 74m sulphide zone. Preliminary pXRF readings show copper enrichment averaging 940ppm, with peaks at 5,724ppm, though formal laboratory assays are expected in four to six weeks. Reasoning: The announcement reports a new copper discovery via pXRF at the Niobe prospect, which adds a new commodity dimension to the existing project, though formal assay verification is pending. - Positive factor: Discovery of new copper mineralization at Niobe prospect - Positive factor: Broad 74m sulphide zone identified - Positive factor: Consistent pXRF copper enrichment - Negative factor: Laboratory assays are still pending - Negative factor: Results are based on preliminary pXRF readings rather than certified lab assays Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 2 ## Classification and evidence **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: The copper mineralization represents a new discovery/dimension at the Niobe prospect within the Khaleesi project. Evidence · text > RareX has unboxed a new copper opportunity at Niobe, adding to its gallium, niobium and rare earths story. **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: The reported copper grades are from portable XRF \(pXRF\) and the company explicitly states laboratory assays are still pending. Evidence · text > pXRF peaks at 5724ppm Cu, with lab assays still pending ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Drill Results (2) ### KRC012 [Link to this fact](https://atlas-extractions.minestarters.com/news/rarex-adds-copper-to-niobe-mix-with-broad-sulphide-zone--e12a003d-7fcd-4d27-8458-8772643865bf#fact-drill-facts-0) Niobe · copper #### Identity - Hole ID: KRC012 - Project: Niobe - Commodity: copper - Region: australia\_wa - Reported Region: australia\_wa - Ticker: REE #### Geometry - Grade: 940 - Grade Unit: ppm - Intercept: 74 m - From: 77 m - To: 151 m - Intercept Depth: 77 m #### Classification - Program: exploration - Sample Type: drill - Group ID: KRC012:77-151 #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, blanks #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: Significant width of copper enrichment identified via pXRF, but requires lab verification. - Positive factor: Broad 74m interval - Negative factor: Preliminary pXRF data only Evidence · text > Portable XRF readings outlined copper enrichment over 74m from 77m to 151m downhole, with the interval averaging 940ppm Cu. #### 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 ### KRC012 [Link to this fact](https://atlas-extractions.minestarters.com/news/rarex-adds-copper-to-niobe-mix-with-broad-sulphide-zone--e12a003d-7fcd-4d27-8458-8772643865bf#fact-drill-facts-1) Niobe · copper #### Identity - Hole ID: KRC012 - Project: Niobe - Commodity: copper - Region: australia\_wa - Reported Region: australia\_wa - Ticker: REE #### Geometry - Grade: 5724 - Grade Unit: ppm #### Classification - Program: exploration - Sample Type: drill #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, blanks #### Review - Needs Review: No - Interp. Status: low\_confidence - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: High peak grade detected in pXRF readings. - Positive factor: High peak grade - Negative factor: Peak value from pXRF Evidence · text > pXRF peaks at 5724ppm Cu #### 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.