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
Original announcement by tmx on
- 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
Analysis by Minestarters Atlas
Minestarters Atlas analysis
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 factors
- High gold recovery (87%) on coarse material
- Favourable comparison to previous fine-fraction testing
- Low cyanide consumption (0.2 kg/t)
- Fast leach kinetics (majority within 12 hours)
- QA/QC disclosed with QP sign-off
Negative factors
- Higher end of average CaO consumption (3.8 kg/t)
Facts used in scoring: 2
Classification and evidence
High Recoverypositive
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 Disclosedpositive · Story-specific tag
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 Onlynegative
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 rollgoldRecovery: 87 %Head Grade: 0.65Head Grade Unit: g/t AuEqView all detailsHide details
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 factors
- High recovery on coarse fraction
- Low cyanide consumption
Negative factors
- 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 rollsilverRecovery: 67 %Head Grade: 0.65Head Grade Unit: g/t AuEqView all detailsHide details
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 factors
- 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.