Phase 1 Metallurgical Results Show Broad Cyanide Response at Volcan
Original announcement by tmx on
- Company
- Tiernan Gold Corp.
- Ticker
- TNGD
- Exchange
- TSX
- Region
- Atacama Region, Chile
- Primary commodity
- Gold
- Secondary commodities
- Copper
- Document categories
- Metallurgy
- Extracted
- 2026-09-15 02:43:01 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Tiernan Gold Corp. has released Phase 1 diagnostic leach results for the Volcan Gold Project in Chile, showing an average cyanide-soluble gold distribution of 75.1% across 36 variability samples. The results demonstrate a broad response to cyanide across different grade ranges, which will guide Phase 2 metallurgical testing and Pre-Feasibility Study (PFS) modelling.
Reasoning: Phase 1 diagnostic leach results demonstrate good cyanide solubility (75.1% average) across various grade profiles, providing a technical basis for upcoming PFS work, though results are not yet commercial-scale projections.
Positive factors
- Broad cyanide response across multiple grade ranges
- Higher-grade material shows stronger average response
- Diagnostic results provide useful baseline for PFS modelling
Negative factors
- Results are diagnostic and not projected commercial recoveries
- Identification of lower-response metallurgical domains requires further investigation
Facts used in scoring: 5
Classification and evidence
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The results are described as Phase 1 diagnostic leach tests, which are screening-level tests used to characterize deportment rather than commercial-scale tests.
Evidence · text
“These results are diagnostic test results and should not be interpreted as projected heap leach recoveries.”
QP/CP Signedpositive · Story-specific tag
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: The release includes a Qualified Person statement signed by Sergio Lagos.
Evidence · text
“supervised and prepared by Sergio Lagos, RM CMC, who is an independent "qualified person"”
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: the document describes a heap_leach route ("heap leach")
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a mill_cil route ("agitated leach")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 5 distinct composites were tested
Extracted facts
Stored fact records: 5. Some facts used in scoring do not have a stored record.
Metallurgical Results (5)
diagnostic leachVolcan Gold Project · goldRecovery: 68.45 %Head Grade: 0.62Head Grade Unit: g/t AuView all detailsHide details
Identity
- Project
- Volcan Gold Project
- Commodity
- gold
- Region
- chile
- Reported Region
- Atacama Region, Chile
- Ticker
- TNGD
Test Work
- Program Status
- preliminary
- Test Type
- diagnostic leach
- Sample
- Low grade variability samples
- Grind P80
- 75 µm
Recovery
- Recovery
- 68.45 %
- Recovery Basis
- actual_test
- Head Grade
- 0.62
- Head Grade Unit
- g/t Au
Lab
- Laboratory
- SGS Canada Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-02T00:00:00.000Z
Reasoning: Average recovery for low grade group based on provided range midpoint.
Evidence · table
“75.5%”
Context: Low grade
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 68.45% is below the weak band (80%)
diagnostic leachVolcan Gold Project · goldRecovery: 61.65 %Head Grade: 1.005Head Grade Unit: g/t AuView all detailsHide details
Identity
- Project
- Volcan Gold Project
- Commodity
- gold
- Region
- chile
- Reported Region
- Atacama Region, Chile
- Ticker
- TNGD
Test Work
- Program Status
- preliminary
- Test Type
- diagnostic leach
- Sample
- Medium grade variability samples
- Grind P80
- 75 µm
Recovery
- Recovery
- 61.65 %
- Recovery Basis
- actual_test
- Head Grade
- 1.005
- Head Grade Unit
- g/t Au
Lab
- Laboratory
- SGS Canada Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-02T00:00:00.000Z
Reasoning: Average recovery for medium grade group based on provided range midpoint.
Evidence · table
“71.8%”
Context: Medium grade
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 61.65% is below the weak band (80%)
diagnostic leachVolcan Gold Project · goldRecovery: 69 %Head Grade: 1.61Head Grade Unit: g/t AuView all detailsHide details
Identity
- Project
- Volcan Gold Project
- Commodity
- gold
- Region
- chile
- Reported Region
- Atacama Region, Chile
- Ticker
- TNGD
Test Work
- Program Status
- preliminary
- Test Type
- diagnostic leach
- Sample
- High grade variability samples
- Grind P80
- 75 µm
Recovery
- Recovery
- 69 %
- Recovery Basis
- actual_test
- Head Grade
- 1.61
- Head Grade Unit
- g/t Au
Lab
- Laboratory
- SGS Canada Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-02T00:00:00.000Z
Reasoning: Average recovery for high grade group based on provided range midpoint.
Evidence · table
“77.8%”
Context: High grade
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 69% is below the weak band (80%)
diagnostic leachVolcan Gold Project · goldRecovery: 76.75 %Head Grade: 2.615Head Grade Unit: g/t AuView all detailsHide details
Identity
- Project
- Volcan Gold Project
- Commodity
- gold
- Region
- chile
- Reported Region
- Atacama Region, Chile
- Ticker
- TNGD
Test Work
- Program Status
- preliminary
- Test Type
- diagnostic leach
- Sample
- Super-high grade variability samples
- Grind P80
- 75 µm
Recovery
- Recovery
- 76.75 %
- Recovery Basis
- actual_test
- Head Grade
- 2.615
- Head Grade Unit
- g/t Au
Lab
- Laboratory
- SGS Canada Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-02T00:00:00.000Z
Reasoning: Average recovery for super-high grade group based on provided range midpoint.
Evidence · table
“81.0%”
Context: Super-high grade
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 76.75% is below the weak band (80%)
diagnostic leachVolcan Gold Project · goldRecovery: 67.5 %Head Grade: 0.38Head Grade Unit: g/t AuView all detailsHide details
Identity
- Project
- Volcan Gold Project
- Commodity
- gold
- Region
- chile
- Reported Region
- Atacama Region, Chile
- Ticker
- TNGD
Test Work
- Program Status
- preliminary
- Test Type
- diagnostic leach
- Sample
- Stockpile-designated variability samples
- Grind P80
- 75 µm
Recovery
- Recovery
- 67.5 %
- Recovery Basis
- actual_test
- Head Grade
- 0.38
- Head Grade Unit
- g/t Au
Lab
- Laboratory
- SGS Canada Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-02T00:00:00.000Z
Reasoning: Average recovery for stockpile group based on provided range midpoint.
Evidence · table
“70.5%”
Context: Stockpile-designated
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 67.5% is below the weak band (80%)
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.