Canadian Mining Journal

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MINERAL PROCESSING: Gold recovery from Blackdome tails over 92%

BRITISH COLUMBIA - Vancouver-based Sona Resources (formerly J-Pacific Gold) says that recent metallurgical tes...



BRITISH COLUMBIA – Vancouver-based Sona Resources (formerly J-Pacific Gold) says that recent metallurgical testing indicates that 92.3% of the gold in the tailings from the former Blackdome mine 250 km north of Vancouver can be recovered using cyanidation. The tests were conducted by SGS Lakefield Research.

The tailings grade slightly less than 2 g/t Au, but when the Blackdome mine operated from 1986 to 1991 and again in 1998, it produced 231,000 oz of gold and 564,000 oz of silver from the 357,000 tonnes of ore that were milled. Recoverable grades were about 20 g/t Au. The tails now in the pond are impounded by and rock and clay-filled dam, and are classified as non-acid-generating.

Sona says it wants to bring the Blackdome mill back into production over the next two or three years using feed both from the Blackdome mine and the Elizabeth deposit 30 km south of the mill.

Information on these projects as well as Sona’s holdings in Nevada and Quebec are available at www.SonaResources.com.