# Mount Ridley lifts rare earth, scandium recoveries as trademarked Selectro cuts reagent dose Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd Original source: https://stockhead.com.au/resources/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-reagent-dose/ Publisher: stockhead Original announcement: 2026-09-17T00:52:34.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Mount Ridley Mines - Ticker: MRD - Exchange: Unavailable - Region: Western Australia - Primary commodity: Rare earth - Secondary commodities: Scandium, Gallium - Document categories: Metallurgy, Resource update - Extracted: 2026-09-17 01:03:13 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Mount Ridley Mines reported improved metallurgical recoveries for scandium \(91.8%\) and rare earths \(HREE 84%, LREE 77%\) using its proprietary Selectro leach process. Notably, these improvements were achieved while halving the reagent dose compared to previous tests, suggesting significant potential for cost optimization. Reasoning: The metallurgical results show strong technical progress with improved recoveries and significantly reduced reagent consumption, though gallium recovery saw a decline. - Positive factor: Significant increase in scandium recovery to 91.8% - Positive factor: Improved rare earth recoveries \(HREE 84%, LREE 77%\) - Positive factor: Achieved results while halving reagent dose, indicating significant cost-saving potential - Positive factor: Proprietary Selectro process outperforming hydrochloric acid baseline - Negative factor: Gallium recovery declined from 55.8% to 41.5% Facts used in scoring: 6 ## Classification and evidence **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: Scandium recovery reached 91.8% which is exceptional for the commodity. Evidence · text > lifts scandium recovery to a program-high of 91.8% **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The testing involves a leach process \(Selectro\) and upcoming flotation. Evidence · text > proprietary Selectro leach process **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The project holds an inferred scandium resource. Evidence · text > holds an inferred scandium resource of 946Mt **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: A current resource fact retains the disclosed cut-off grade **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: only one composite was tested ## Extracted facts Stored fact records: 6. Some facts used in scoring do not have a stored record. ## Resource Estimates (2) ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-resource-facts-4) Grass Patch · scandium #### Identity - Project: Grass Patch - Commodity: scandium - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Resource scope - Estimate type: resource - Reporting standards: jorc - Resource group id: resource:daf921ec6cf6400f9b6d #### Resource Data - Category: inferred - Tonnes: 946000000 - Grade: 50.1 - Grade Unit: ppm - Contained Metal: 47357 - Contained Unit: t - Cutoff Grade: 25 - Cutoff Unit: ppm #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Large inferred scandium resource reported. - Negative factor: Inferred category Evidence · text > Grass Patch project currently holds an inferred scandium resource of 946Mt at 50.1ppm for 47,357t contained scandium at a 25ppm cut-off #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **JORC Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with JORC Code \(Australia\) — high reporting standard. Why it applies: reporting\_standards includes jorc **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-resource-facts-5) Grass Patch · rare earth #### Identity - Project: Grass Patch - Commodity: rare earth - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Resource scope - Estimate type: resource - Reporting standards: jorc - Resource group id: resource:c36c910522e002384174 #### Resource Data - Category: inferred - Tonnes: 122546000 - Grade: 889 - Grade Unit: ppm - Contained Metal: 44610 - Contained Unit: t - Cutoff Grade: 300 - Cutoff Unit: ppm #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: HREE-rich rare earth resource reported. - Negative factor: Inferred category Evidence · text > hosts a 122.546Mt HREE-rich rare earth resource at 889ppm TREO, including 364ppm HREO and 44,610t contained HREO, at a 300ppm TREO cut-off #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **JORC Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with JORC Code \(Australia\) — high reporting standard. Why it applies: reporting\_standards includes jorc **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ## Metallurgical Results (4) ### leach [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-metallurgical-facts-0) Grass Patch · scandium #### Identity - Project: Grass Patch - Commodity: scandium - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro leach process - Sample: Test 3 on unbeneficiated Grass Patch feed #### Recovery - Recovery: 91.8 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Significant increase in scandium recovery to 91.8%. - Positive factor: Program high recovery Evidence · text > lifts scandium recovery to a program-high of 91.8% ### leach [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-metallurgical-facts-1) Grass Patch · rare earth #### Identity - Project: Grass Patch - Commodity: rare earth - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro leach process - Sample: Test 3 on unbeneficiated Grass Patch feed \(HREE\) #### Recovery - Recovery: 84 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: HREE recovery lifted to 84%. - Positive factor: Improved HREE recovery Evidence · text > lifted average heavy rare earth \(HREE\) and light rare earth \(LREE\) recoveries to 84% and 77% respectively ### leach [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-metallurgical-facts-2) Grass Patch · rare earth #### Identity - Project: Grass Patch - Commodity: rare earth - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro leach process - Sample: Test 3 on unbeneficiated Grass Patch feed \(LREE\) #### Recovery - Recovery: 77 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: LREE recovery lifted to 77%. - Positive factor: Improved LREE recovery Evidence · text > lifted average heavy rare earth \(HREE\) and light rare earth \(LREE\) recoveries to 84% and 77% respectively ### leach [Link to this fact](https://atlas-extractions.minestarters.com/news/mount-ridley-lifts-rare-earth-scandium-recoveries-as-trademarked-selectro-cuts-r--2c3fd77a-6c7e-42b9-9e7e-eda3aba51cdd#fact-metallurgical-facts-3) Grass Patch · gallium #### Identity - Project: Grass Patch - Commodity: gallium - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro leach process - Sample: Test 3 on unbeneficiated Grass Patch feed #### Recovery - Recovery: 41.5 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Gallium recovery dropped from 55.8% in Test 2 to 41.5%. - Negative factor: Recovery drop Evidence · text > gallium, which saw recoveries drop from 55.8% in Test 2 to about 41.5% ## 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.