Mammoth Announces Gold Recoveries of up to 90% from Bottle Roll Tests on Material from 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 23:13:50 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Mammoth Resources reported successful cyanide bottle roll test results from its Tenoriba property in Mexico, with gold recoveries reaching up to 94% for oxidized material. The results show rapid dissolution kinetics, supporting the potential for low-cost heap leach mining of the near-surface mineralized zones.
Reasoning: Strong gold and silver recoveries from bottle roll tests on oxidized material suggest good heap leach potential for the near-surface mineralization.
Positive factors
- High gold recoveries (>90% for oxidized material)
- Rapid dissolution kinetics (majority within 12 hours)
- Potential for low-cost heap leach technology
- QA/QC disclosed with SGS laboratory and QP sign-off
Negative factors
- Test scale is bench-scale (bottle roll) only
- Mixed oxidized-sulfide/transition zone recovery is lower (74% Au)
Facts used in scoring: 6
Classification and evidence
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: Gold recoveries in oxidized material reached up to 94% in bottle roll tests.
Evidence · text
“Gold recoveries in two bottle roll tests are greater than 90% for the oxidized material samples”
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The metallurgical results are based on 96-hour cyanide bottle roll tests.
Evidence · text
“three individual, 96-hour cyanide bottle roll tests were performed”
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: The release mentions SGS laboratory, check assays, and Qualified Persons (QP) sign-off.
Evidence · text
“SGS lab QA/QC procedures were performed which includes check assays.”
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: The company explicitly discusses the potential for low-cost heap leach technology based on these results.
Evidence · text
“bodes well for potential gold-silver recoveries by low-cost, heap leach technology”
Extracted facts
Stored fact records: 6. Some facts used in scoring do not have a stored record.
Metallurgical Results (6)
bottle rollgoldRecovery: 74.7 %View all detailsHide details
Identity
- Commodity
- gold
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample A mixed oxidized-sulfide/transition zone
- Leach Time
- 96 hours
Recovery
- Recovery
- 74.7 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 74.7% recovery for transition zone material is moderate compared to the >90% seen in oxidized samples.
Positive factors
- Rapid dissolution in first 12 hours
Negative factors
- Lower recovery compared to oxidized samples
Evidence · text
“74.7% gold dissolution occurs in 96 hours”
bottle rollgoldRecovery: 94 %View all detailsHide details
Identity
- Commodity
- gold
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample B oxidized material
- Leach Time
- 96 hours
Recovery
- Recovery
- 94 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 94% recovery for oxidized material is strong for a bottle roll test.
Positive factors
- High recovery (>90%)
- Rapid dissolution
Evidence · table
“94.0”
Context: 96
bottle rollgoldRecovery: 91.1 %View all detailsHide details
Identity
- Commodity
- gold
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample C oxidized material
- Leach Time
- 96 hours
Recovery
- Recovery
- 91.1 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 91.1% recovery for oxidized material is strong.
Positive factors
- High recovery (>90%)
Evidence · table
“91.1”
Context: 96
bottle rollsilverRecovery: 64 %View all detailsHide details
Identity
- Commodity
- silver
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample A mixed oxidized-sulfide/transition zone
- Leach Time
- 96 hours
Recovery
- Recovery
- 64 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 64% silver recovery is solid for a mixed zone sample.
Positive factors
- Good silver recovery for transition zone
Evidence · text
“64% dissolution after 96 hours”
bottle rollsilverRecovery: 58.8 %View all detailsHide details
Identity
- Commodity
- silver
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample B oxidized material
- Leach Time
- 96 hours
Recovery
- Recovery
- 58.8 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 58.8% silver recovery is consistent with the reported range for oxidized samples.
Evidence · table
“58.8”
Context: 96
bottle rollsilverRecovery: 58.9 %View all detailsHide details
Identity
- Commodity
- silver
- Ticker
- MTH
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Sample
- Sample C oxidized material
- Leach Time
- 96 hours
Recovery
- Recovery
- 58.9 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2023-11-09T00:00:00.000Z
Reasoning: 58.9% silver recovery is consistent with the reported range for oxidized samples.
Evidence · table
“58.9”
Context: 96
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.