Nov 28 2013
Pershimco Resources Inc. is pleased to announce remarkable results from its ongoing metallurgical testing program of oxide mineralization from the Company's flagship Gold-Copper Cerro Quema project, in Panama.
These results, detailed in the "Report on Heap Leach Cyanidation Testing - Cerro Quema Composites," continue to indicate that the Cerro Quema mineralization is amenable to standard continuous vat leach ("CVL") or heap leaching, with gold recoveries above the average found at comparable operational mines. Also, the deleterious elements present in the process were well below levels that would affect standard industry mineral processing practices.
Highlights of the results of column testing of oxide composites:
- Column Tests returned an average of 96.2 % gold recovery;
- 80% gold recovery is obtained within less than two weeks;
- Cyanide consumption was "low to moderate"; and
- Deleterious elements present in the process were well below levels that would affect standard industry mineral processing practices.
Overall metallurgical results show that the four Cerro Quema La Pava oxide composites tested were readily amenable to heap leach cyanidation treatment at the 100%-25mm feed size. The maximum gold recovery achieved from oxide composites at this feed size was 97.2%, the minimum was 93.8%, with an average recovery of 96.2% in 75 to 95 days of leaching and rinsing. Pershimco will further evaluate these results in the pre-feasibility study being prepared and will adjust to a lower recovery value as per larger commercial practice.