News Bureau

 
 
September 26, 2020

Liberty Gold extracts 79% weighted average!

Liberty Gold Corp report results from Bulk Sample metallurgical testing on oxide material from its Black Pine Project in south-eastern Idaho, providing support for a simple heap leach mining scenario. Gold extractions from six, 300 kilogram, large-diameter column tests were rapid, and >80% of the leachable gold was extracted within 10 days, with final column leach gold extractions ranging up to 92.8%.

Results from the metallurgical test work demonstrate that oxide material from Black Pine responds well to column testing and will contribute to low capital and operating costs in the future.  The test work undertaken on the project has significantly mitigated the metallurgical risk related to the known mineralization.

The work was supervised by independent consulting metallurgist Gary Simmons, formerly the Director of Metallurgy and Technology for Newmont Mining Corp. Mr. Simmons has managed or supervised a significant number of metallurgical testing programs on similar deposits throughout the Great Basin.

According to Mr. Simmons, “Data from metallurgical testing to date at Black Pine point to rapid leaching and relatively high gold extractions and suggest that a combination Run of Mine and coarse crush/agglomeration heap leaching may be the preferred process option at Black Pine.”

Report highlights include,

1: Six column leach tests produced a weighted average 78.9% gold extraction with a range up to 92.8% gold extraction.  Gold extraction was rapid, with >80% of the leachable gold extracted within the first 10 days of column leaching. Six coarse bottle roll tests produced a weighted average 79.1% gold extraction.

2: Gold extraction is relatively insensitive to particle size, with the exception of one sample from the southernmost, I-pit. All other composites can be projected to coarse particle sizes approximating run of mine conditions without significant loss of gold extraction. Results generated by this program are comparable to historical column test results generated by Noranda in 1988 from oxide material obtained prior to mining.

 

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