# Mammoth Announces Gold Recoveries Of 87% From Bottle Roll Tests On Coarser-Fraction Material From The Large Carneritos Area On Its Tenoriba Gold-Silver Property, Mexico Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/mammoth-announces-gold-recoveries-of-87-from-bottle-roll-tests-on-coarser-fracti--f1afccb1-fe69-44b1-bac3-26c4c1ce6bac Original source: https://money.tmx.com/en/quote/MTH/news/6125087818468589/mammoth-announces-gold-recoveries-of-87-from-bottle-roll-tests-on-coarser-fracti Publisher: tmx Original announcement: 2026-02-05T18:30:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Mammoth Resources Corp. - Ticker: MTH - Exchange: TSX - Region: Chihuahua State, Mexico - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Metallurgy - Extracted: 2026-08-25 22:58:35 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Mammoth Resources reported 87% gold and 67% silver recoveries from bottle roll tests on coarse-fraction oxidized material at the Tenoriba project. These results are comparable to previous fine-fraction testing and suggest strong potential for low-cost heap leach processing of near-surface material. Reasoning: The results demonstrate that high gold and silver recoveries are achievable even with a much coarser fraction of material, which is a significant de-risking step for future heap leach processing. - Positive factor: High gold recovery \(87%\) on coarse material - Positive factor: Favourable comparison to previous fine-fraction testing - Positive factor: Low cyanide consumption \(0.2 kg/t\) - Positive factor: Fast leach kinetics \(majority within 12 hours\) - Positive factor: QA/QC disclosed with QP sign-off - Negative factor: Higher end of average CaO consumption \(3.8 kg/t\) Facts used in scoring: 2 ## Classification and evidence **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: Gold recovery of 87% on coarse material is within the exceptional/strong band for oxide leach. Evidence · text > gave recoveries of 87% gold and 67% silver **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: Release names a Qualified Person \(Richard Simpson\) and a certified laboratory \(SGS\). Evidence · text > All cyanide bottle roll tests were performed at the SGS Laboratory... supervised by... a qualified person. **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: Testing was performed using bottle roll tests, which are screening-level bench tests. Evidence · text > results from bottle roll tests performed on a coarser-fraction composite sample ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Metallurgical Results (2) ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/mammoth-announces-gold-recoveries-of-87-from-bottle-roll-tests-on-coarser-fracti--f1afccb1-fe69-44b1-bac3-26c4c1ce6bac#fact-metallurgical-facts-0) gold #### Identity - Commodity: gold - Ticker: MTH #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: cyanide bottle roll - Sample: composite oxidized coarser-grained material, minus 10-mesh - Leach Time: 96 hours #### Recovery - Recovery: 87 % - Recovery Basis: actual\_test - Head Grade: 0.65 - Head Grade Unit: g/t AuEq #### Reagents - Cyanide: 0.2 kg/t - Lime: 3.8 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: 87% recovery on coarse material is a strong indicator for heap leach viability. - Positive factor: High recovery on coarse fraction - Positive factor: Low cyanide consumption - Negative factor: High CaO consumption Evidence · text > Gold dissolution recovery... from the coarser fraction, minus 10-mesh, bottle roll test of composite oxidized coarser-grained material is 87% ### bottle roll [Link to this fact](https://atlas-staging.minestarters.com/news/mammoth-announces-gold-recoveries-of-87-from-bottle-roll-tests-on-coarser-fracti--f1afccb1-fe69-44b1-bac3-26c4c1ce6bac#fact-metallurgical-facts-1) silver #### Identity - Commodity: silver - Ticker: MTH #### Test Work - Program Status: preliminary - Test Type: bottle roll - Processing Route: cyanide bottle roll - Sample: composite oxidized coarser-grained material, minus 10-mesh - Leach Time: 96 hours #### Recovery - Recovery: 67 % - Recovery Basis: actual\_test - Head Grade: 0.65 - Head Grade Unit: g/t AuEq #### Reagents - Cyanide: 0.2 kg/t - Lime: 3.8 kg/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-02-05T00:00:00.000Z Reasoning: 67% silver recovery on coarse material is consistent with previous fine-fraction results. - Positive factor: Solid silver recovery on coarse material Evidence · text > silver recovery is 67% ## 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.