Liberty Gold Validates Predicted Operating Gold Leach Recoveries Through Bulk Column Tests at Run-of-Mine Sizing
Original announcement by orestocks on
- Company
- Liberty Gold Corp.
- Ticker
- LGD.TO
- Exchange
- Unavailable
- Region
- Idaho
- Primary commodity
- Gold
- Secondary commodities
- Silver
- Document categories
- Metallurgy
- Extracted
- 2026-09-17 10:11:19 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Liberty Gold has successfully validated its gold leach recovery models for run-of-mine (ROM) sized material through bulk column testing at the Black Pine Oxide Gold Project. The results confirm that gold extraction is relatively insensitive to particle size, supporting a low-cost heap leach strategy without the need for crushing.
Reasoning: The bulk column tests successfully validate the company's ROM heap leach recovery assumptions, significantly de-risking the project's processing strategy and supporting the recent Feasibility Study.
Positive factors
- Validation of ROM heap leach recovery models
- Rapid leach kinetics (90% in 36 days)
- High extraction (95%) in Rangefront Ppos sample
- Low sensitivity to particle size (crushing not required)
- Favorable permeability results
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 project utilizes a heap leach processing route.
Evidence · text
“ROM heap leach operation”
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: Bulk column results showed 95% extraction for the Rangefront Ppos sample and an average of 72.4% for bulk columns, with many reaching 90% in 36 days.
Evidence · text
“The Rangefront Ppos sample had the highest extraction tested at 95%”
Free Millingpositive
Simple, clean ore amenable to standard processing without oxidation.
Why it applies: The ore is described as oxide ore with rapid leach kinetics and favorable characteristics.
Evidence · text
“Black Pine is emerging as a classic example of oxide ores where ROM gold extractions are rapid”
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")
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)
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.TO
Test Work
- Program Status
- detailed
- Test Type
- column leach
- Sample
- Rangefront Ppos sample
Recovery
- Recovery
- 95 %
- Head Grade
- 0.43
- Head Grade Unit
- g/t
Lab
- Laboratory
- KCA
- Consultant
- Gary Simmons
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Exceptionally high recovery for the given head grade, providing significant value upside.
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%)
column leachBlack Pine · goldRecovery: 51.9 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- gold
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD.TO
Test Work
- Program Status
- detailed
- Test Type
- column leach
- Sample
- I-pit Pold sample
Recovery
- Recovery
- 51.9 %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Result was expected and consistent with existing models for this specific rock unit.
Positive factors
- Aligned with modeled recoveries
Negative factors
- Lower gold extraction expected for this unit
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
column leachBlack Pine · goldRecovery: 72.4 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- gold
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD.TO
Test Work
- Program Status
- detailed
- Test Type
- column leach
- Sample
- Average weighted bulk columns
Recovery
- Recovery
- 72.4 %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Validates the feasibility study models for bulk material.
Positive factors
- In line with modeled recoveries in the recent FS
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
column leachBlack Pine · silverRecovery: 21 %View all detailsHide details
Identity
- Project
- Black Pine
- Commodity
- silver
- Region
- usa_id
- Reported Region
- Idaho
- Ticker
- LGD.TO
Test Work
- Program Status
- detailed
- Test Type
- column leach
- Sample
- Bulk column leach tests
Recovery
- Recovery
- 21 %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-17T00:00:00.000Z
Reasoning: Provides a basis for future silver production modeling.
Positive factors
- Above previous variability composite averages
Evidence · text
“Bulk column leach tests recorded silver (“Ag”) extractions up to 39%, with a 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.