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Highlights
- Phase 5B tests confirm weighted average gold extraction of 81.9% at Black Pine.
- Rangefront Zone shows slightly higher recoveries than Discovery Zone, up to 85.2%.
- Gold leaching demonstrates low sensitivity to particle size, supporting ROM heap leach processing.
Liberty Gold Corp. (TSX:LGD) has reported results from its Phase 5B metallurgical program at the Black Pine Oxide Gold Project in southeast Idaho. The program confirms consistent and predictable gold recoveries across the primary ore bodies, reinforcing the feasibility of a low-cost, run-of-mine (ROM) heap leach flowsheet. Weighted average column leach gold extraction across all zones was 81.9% at an average head grade of 0.65 ppm Au, with individual composites ranging from 52% to 94.5%.
The Rangefront Zone achieved a weighted average gold extraction of 85.2% over seven column tests, while the Discovery Zone recorded 80.5% across fifteen column tests. These results were consistent with coarse crush bottle roll tests, which yielded 78.4%, indicating that gold leaching at Black Pine is largely insensitive to particle size. The findings support the current feasibility recovery model, showing gold recoveries in line with or slightly above previous metallurgical results. Silver extractions were also measured, with an average of 19% and peak recovery of 68.1%, consistent with prior observations.
Phase 5B focuses on infill sampling within the primary mining phases of Rangefront and Discovery Zones. Liberty Gold plans further feasibility-level metallurgical testing in 2026, including bulk sample columns and variability studies to refine recovery predictions.
Liberty Gold is focused on developing open-pit oxide gold deposits in the Great Basin of the United States, with the Black Pine Project located in southeastern Idaho. The project is a past-producing, Carlin-style gold system with a growing resource and ongoing feasibility studies.
