Liberty Gold Validates Predicted Operating Gold Leach Recoveries Through Bulk Column Tests at Run-of-Mine Sizing
Original announcement by globenewswire on
- Company
- Liberty Gold Corp.
- Ticker
- LGD
- Exchange
- Unavailable
- Region
- Idaho
- Primary commodity
- Gold
- Secondary commodities
- Silver
- Document categories
- Metallurgy
- Extracted
- 2026-09-17 10:32:47 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Liberty Gold has completed Phase 6 metallurgical bulk column tests at the Black Pine Oxide Gold Project, confirming that gold leach recoveries for run-of-mine (ROM) sized material align with previous feasibility study models. The results demonstrate rapid leach kinetics and favorable reagent consumption, supporting a low-cost heap leach processing strategy.
Reasoning: Bulk column tests successfully validated the gold recovery models for run-of-mine sizing, significantly de-risking the heap leach processing route for the Black Pine project.
Positive factors
- Validated ROM heap leach recoveries
- Rapid leach kinetics
- Low reagent consumption
- Favorable permeability
Negative factors
- One sample underperformed due to high clay content
Facts used in scoring: 4
Classification and evidence
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The testing was conducted using bulk column leaching to simulate a heap leach operation.
Evidence · text
“using bulk column leaching”
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: The program specifically validates recoveries for a ROM heap leach processing route.
Evidence · text
“support a ROM heap leach processing route”
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 4 distinct composites were tested
Extracted facts
Stored fact records: 4. Some facts used in scoring do not have a stored record.
Metallurgical Results (4)
bulk column leachBlack Pine · goldRecovery: 95 %Head Grade: 0.43Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- gold
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD
Test Work
- Program Status
- detailed
- Test Type
- bulk column leach
- Processing Route
- ROM heap leach
- Sample
- Rangefront Ppos sample
Recovery
- Recovery
- 95 %
- Head Grade
- 0.43
- Head Grade Unit
- g/t
Lab
- Laboratory
- Kappes, Cassiday & Associates (KCA)
- Consultant
- Gary Simmons
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: High recovery (95%) at a low head grade (0.43 g/t) significantly exceeds modeled expectations for this unit.
Positive factors
- Outperformed modeled recoveries by over 13%
Evidence · text
“The Rangefront Ppos sample had the highest extraction tested at 95% for a 0.43 g/t gold head grade.”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 95% is at or above the exceptional band (75%)
bulk column leachBlack Pine · goldRecovery: 51.9 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- gold
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD
Test Work
- Program Status
- detailed
- Test Type
- bulk column leach
- Processing Route
- ROM heap leach
- Sample
- I-pit Pold sample
Recovery
- Recovery
- 51.9 %
Lab
- Laboratory
- Kappes, Cassiday & Associates (KCA)
- Consultant
- Gary Simmons
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Lower recovery was expected for this specific rock unit and matches previous models.
Positive factors
- Aligned with modeled recoveries
Evidence · text
“The I-pit Pold sample extraction at 51.9% was an expected result”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
bulk column leachBlack Pine · goldRecovery: 72.4 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- gold
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD
Test Work
- Program Status
- detailed
- Test Type
- bulk column leach
- Processing Route
- ROM heap leach
- Sample
- Average weighted gold extraction for bulk columns
Recovery
- Recovery
- 72.4 %
Lab
- Laboratory
- Kappes, Cassiday & Associates (KCA)
- Consultant
- Gary Simmons
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: The average recovery validates the feasibility study models for the project.
Positive factors
- In line with modeled recoveries
Evidence · text
“The average weighted gold extraction for the bulk columns was 72.4%”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
bulk column leachBlack Pine · silverRecovery: 21 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- silver
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD
Test Work
- Program Status
- detailed
- Test Type
- bulk column leach
- Processing Route
- ROM heap leach
- Sample
- Bulk column leach tests (weighted average)
Recovery
- Recovery
- 21 %
Lab
- Laboratory
- Kappes, Cassiday & Associates (KCA)
- Consultant
- Gary Simmons
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Silver recovery is being used to update future models; current results are better than previous averages.
Positive factors
- Above previous variability composite averages
Evidence · text
“weighted average Ag recovery of 21%”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 21% is below the weak band (75%)
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.