Canadian Mining Journal


SILVER-COBALT: CSR begins bulk sampling at Castle mine

ONTARIO – Castle Silver Resources of Coquitlam, B.C., has started underground bulk sampling at its 100% owned Castle silver-cobalt mine near Gowganda. Crews have removed a large sample on the first level of the mine from a quartz-carbonate vein containing visible cobalt.

CSR president and CEO Frank Basa (right) discusses drilling at the old Castle Silver mine with project geologist Douglas Robinson. Credit: Castle Silver Resources.

CSR plans to send some of the mineralized material for conventional assaying. The remainder will be treated using the company’s proprietary Re-2OX hydrometallurgical process to produce high purity cobalt powders. The powders will be sent for end user evaluation.

The historic Castle silver mine produced intermittently from 1917 to 1989 with a total output of 22.26 million oz. of silver from the No.3 shaft. CSR and the Matachewan First Nation have a memorandum of understanding that covers the exploration and development of a modern mine.

The Re-2OX process is being used to recovery cobalt and lithium from recycled batteries, a niche that the company is pursuing. In test work, the casing is stripped, and the battery cathode leached. Metals are then precipitated.

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