P2 Gold Announces Positive Interim Metallurgical Results
The Company retained
After 58 days of leaching, the metal recoveries of the Phase 3 Metallurgical Program are far exceeding the recoveries from the Phase Two Metallurgical Program and are exceeding the recoveries used in the
Table 1: Comparison of Interim Oxide Samples Column Test Leach Results at Day 58 (1)(2)
Metal |
Average Metal |
Average Metal |
|
Gold |
86.6 % |
59.4 % |
78 % |
Silver |
73.5 % |
40.2 % |
45 % |
Copper |
56.6 % |
28.4 % |
54 % |
(1) |
Samples were submitted for preparation and multi-element analysis by KCA. All samples were analyzed using multi-acid digestion with ICP finish for silver and copper and fire assay with AA finish for gold. |
(2) |
Interim recoveries based are on standard assaying protocols and will be subject to change at the end of the program when tail assays are available and incorporated into the calculated head assays. |
(3) |
See |
"The Phase Three Metallurgical Program was established with a target of improving the leach kinetics and overall extraction by adding cyanide during agglomeration and by increasing the cyanide concentration in the leach solutions," commented
The Phase Three Metallurgical Program is expected to continue for another 30 to 60 days to achieve maximum recoveries. Final metallurgical recoveries will be announced upon completion of the program.
Prior Metallurgical Programs
The Phase One Metallurgical Program included testing for the potential recoveries of copper and gold from oxide mineralization by sequential leach using heap leach or conventional milling. The test work showed that gold and copper can be recovered by both process options, with extractions averaging 97.2% for gold and 95.2% for copper when the sample is ground to 100 microns. (See P2's news release of
The Phase Two metallurgical program, also conducted by KCA, was focused on determining the preferred extraction process for the Gabbs mineralization. Based on the results of that program, KCA proposed that the oxide material be heap leached and gold recovered as a salable doré and cyanide soluble copper produced as a salable copper sulphide concentrate. Column test leach results ranged up to 89% for gold and 62% for copper. The average extraction for the three column tests was 82% for gold and 50% for copper. (See P2's news release of
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