North of 60 Mining News - The mining newspaper for Alaska and Canada's North

Rockhaven Resources Ltd. provided an update on metallurgical testing of material from its Klaza gold-silver property located in the Dawson Range Gold Belt, Yukon Territory.

Metallurgical testing was conducted by Blue Coast Research Ltd. on three zone-specific and one property-wide composite.

A locked cycle flotation test on a project-wide composite sample, followed by pressure oxidation and carbon-in-leach cyanidation of a gold-bearing sulphide concentrate, yielded overall recoveries of 95 percent gold, 90.8 percent silver, 91.2 percent zinc, and 84.6 percent lead to potentially saleable products.

Of the gold recovered, 65 percent reported to doré.

The process flowsheet consists of lead flotation, followed by zinc flotation, and then by arsenopyrite-pyrite flotation.

The arsenopyrite-pyrite concentrate is then pressure oxidized to liberate the gold and leached with cyanide.

The overall flotation tails are also leached with cyanide.

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Shane Lasley, Publisher

Over his more than 16 years of covering mining and mineral exploration, Shane has become renowned for his ability to report on the sector in a way that is technically sound enough to inform industry insiders while being easy to understand by a wider audience.

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