Liberty Gold Reports Strong Phase 5A Column Leach Metallurgical Results at Black Pine, Confirming Consistent Oxide Gold Recoveries Across Newly Tested Zones 80.6% weighted average gold extraction from 24 column leach tests
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News Release 25-16 August 19, 2025
Liberty Gold Reports Strong Phase 5A Column Leach Metallurgical Results
at Black Pine, Confirming Consistent Oxide Gold Recoveries Across Newly
Tested Zones
80.6% weighted average gold extraction from 24 column leach tests
VANCOUVER, B.C. – Liberty Gold Corp. (TSX: LGD; OTCQX: LGDTF) (“Liberty Gold” or the
“Company”) is pleased to report results from its Phase 5A metallurgical program at the Company’s
Black Pine Oxide Gold Project (“Black Pine”) in southeast Idaho . The new results confirm
consistent, robust gold recoveries across previously untested areas, supporting the feasibility
development of a run-of-mine (“ROM”) heap leach processing flowsheet at Black Pine.
Highlights
• Consistent Gold Extractions and Leach Performance: Weighted average column leach gold
extraction of 80.6%, with individual composites reaching up to 90.8%, demonstrating
metallurgical continuity across multiple mineralized zones; all of the Phase 5A composites
tested exhibit the typical Black Pine leach result of greater than 80% of the eventual gold
extraction achieved in under 10 days.
• Corroborated Bottle Roll Data: Gold and silver extractions from coarse crush bottle roll
tests strongly correlate with column leach results, 78.9% vs 80.6%, respectively, in line
with previous metallurgical results.
• De-risking Project Development: Phase 5A column tests reinforce the suitability of ROM
heap leach processing and provide key inputs into the ongoing feasibility study
metallurgical model.
• Expanded Metallurgical Coverage: Phase 5A testing included composites from Back Range
and J Zone, areas not previously tested and variability composite s infilling previous
sampling in the M Zone, Tallman and F zones.
• Ongoing Programs: Phase 5B (additional variability infill composites) results are expected
in Q3, 2025, Phase 7 (cut-off-grade (“COG”) composites) results expected in Q4, 2025 and
Phase 6 (bulk samples) and Phase 8 (legacy heap facility (“HLF”) sonic drilling composites)
expected in early H1, 2026.
Jon Gilligan, President and CEO, Liberty Gold, commented, “These results further demonstrate that
Black Pine’s oxide gold mineralization is highly amenable to ROM heap leaching, including areas outside
the main deposit zones. As we advance toward the completion of our feasibility study, this growing
metallurgical dataset will help optimize processing parameters, underpin robust project economics, and
reduce technical risk.”
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Phase 5A Metallurgical Test Summary
The Phase 5A program was designed to expand the metallurgical dataset into areas not previously
tested and fill gaps in the main deposit areas, confirming consistency of recoveries across the
broader mineralized footprint. See Figure 1 below for Phase 5A variability composite metallurgical
drill core locations. Metallurgical composites were made from PQ sized core drilled in 2023. A total
of 24 column leach tests were completed under standard test conditions for Black Pine oxide gold
mineralized material, with results summarized below in Table 1.
Figure 1 – Summary map of Black Pine Metallurgical Program Sample Locations
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Table 1 – Weighted Average Gold Extraction Results by Zone – Coarse Bottle Roll and Column
Leach Tests
Zone Average Calculated
Head Grade Au (ppm)
Weighted Average Bottle
Roll Gold Recovery (%)
P80
Weighted Average Column
Leach Gold Recovery (%)
P80
Back
Range
Zone
1.68 80.7% 81.9%
J Zone 0.59 78.9% 78.0%
Tallman
Zone 0.63 75.8% 81.1%
M Zone 0.58 77.3% 81.1%
F Zone 0.42 67.0% 67.3%
All Zones
78.9% 80.6%
Notes: Average Calculated Head Grade is the average of the composite column head grades tested within each
zone. Detailed sample-level results are provided in Table 2 below.
Silver
Column leach tests also showed silver (“Ag”) extractions ranging from 13.7% to 72. 3%. Silver
grades and extractions in M-Zone and Back Range appear higher than other mineralized areas at
Black Pine. Silver grades and extractions for J Zone, Tallman and F Zone are in line with results
from previous metallurgical test phases. Historic production of silver was in the approximate ratio
of ~0.4 ounces of silver for every ounce of gold. Liberty Gold is currently evaluating adding silver
to the resource estimate in the feasibility study.
Interpretation
• Phase 5A gold extractions are in line with previous metallurgical testing across the main
mineralized zones.
• The strong correlation between bottle roll and column leach data validates process
predictability and supports a simple, low-cost ROM leach processing flowsheet for Black
Pine oxide ores.
• These results further de-risk the processing strategy ahead of the feasibility study.
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Ongoing Metallurgical Program
Liberty Gold has an active feasibility-level metallurgical program:
• Phase 5B: Twenty-one “infill” variability composites from Rangefront and Discovery Zone
have completed column leaching and final results are expected in Q3, 2025.
• Phase 6: Seven (Six in-pit and one surface) 20 tonne ROM surface bulk samples sourced
from the main mineralized lithology types, will be tested in Pilot -Scale columns (4 feet
diameter x 20 feet high) at Kappes, Cassiday & Associates (“KCA”) in Reno. Three bulk
samples are currently under leach and the remaining four are in sample collection and
preparation. Results are expected in H1 2026.
• Phase 7: Nine cut-off grade variability composites currently under column leach.
• Phase 8: 24 sonic drill holes (~1,400 meters) have been completed in the legacy heap leach
pad, with initial gold assays received. Metallurgical studies and composites are currently
being planned. It is expected that test work will commence in late Q3, 2025. This material
will be tested for the potential to act as over-liner material and also as direct leach feed.
These programs are designed to finalize gold leach recoveries and optimize process design
criteria as inputs to the Feasibility Study targeted for completion in Q4, 2026.
Quality Assurance – Quality Control
All metallurgical work at Black Pine was conducted at KCA Labs in Reno and is supervised by Gary
Simmons, MMSA, formerly Director of Metallurgy and Technology for Newmont Mining Corp. Mr.
Simmons has managed metallurgical programs on multiple Carlin-style oxide deposits in the Great
Basin.
Peter Shabestari, P.Geo., Vice President Exploration, Liberty Gold, is the Qualified Person
responsible for reviewing and approving the technical content of this release.
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Table 2 – Phase 5A Gold Extraction Results
Sample ID Test Area Bottle Roll %
Extraction
Calculated
Head Grade
Au (ppm)
Column Leach
% Au Ext
Calculated Head
Grade Au (ppm)
98104 B Backrange 66.6 0.433 64.3 0.412
98105 A Backrange 83.9 2.143 85.5 2.107
98106 A Backrange 80.9 5.039 80.1 4.689
98107 B Backrange 86.8 1.167 89.6 1.116
98107 A Backrange 75.3 0.347 76.5 0.306
98108 B Backrange 64.1 0.381 61.8 0.340
98110 B Backrange 83.6 3.983 85.4 4.682
98111 B Backrange 75.4 1.372 79.6 1.355
98112 A Backrange 48.4 0.173 37.6 0.125
98113 A J Zone 78.6 0.562 81.2 0.527
98114 B J Zone 62.7 0.417 64.7 0.337
98115 A J Zone 79.9 1.057 81.0 0.919
98116 A J Zone 86.0 0.836 column abandoned
98117 B Tallman 70.4 0.492 81.0 0.400
98118 B Tallman 65.6 0.342 71.0 0.276
98119 A Tallman 81.0 1.191 83.5 1.204
98120 A M Zone 64.2 0.735 73.6 0.747
98121 B M Zone 73.9 0.263 82.6 0.242
98122 A M Zone 83.4 0.509 86.6 0.461
98123 B M Zone 68.7 0.321 72.8 0.309
98124 B M Zone 82.2 0.859 77.5 0.883
98125 B M Zone 84.9 0.779 90.8 0.840
98126 B F Zone 69.3 0.849 67.3 0.837
98127 B F Zone 56.2 0.245 56.1 0.244
98128 A F Zone 71.6 0.165 81.8 0.187
Averages 78.9% 0.986 ppm Au 80.6% 0.981 ppm Au
Footnote: ppm = parts per million or grams per tonne (g/t)
ABOUT LIBERTY GOLD
Liberty Gold is focused on developing open pit oxide deposits in the Great Basin of the United
States, home to large-scale gold projects that are ideal for open -pit mining. This region is one of
the most prolific gold-producing regions in the world and stretches across Nevada and into Idaho
and Utah. The Company is advancing the Black Pine Project in southeastern Idaho, a past -
producing, Carlin-style gold system with a large, growing resource and strong economic potential.
We know the Great Basin and are driven to advance big gold deposits that can be mined profitably
in open-pit scenarios and in an environmentally responsible manner.
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For more information, visit libertygold.ca or contact:
Susie Bell, Manager, Investor Relations
Phone: 604-632-4677 or Toll Free 1-877-632-4677
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Without limiting the foregoing, these documents use the terms “measured resources”, “indicated resources”, “inferred resources” and “mineral
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