Following a $200,000 metallurgical study,
Roasting incurs higher operating costs; however, by eliminating the selenium, higher zinc recoveries are achievable, which will offset those costs.
The partners are now considering the relative costs of on-site treatment and additional treatment at smelter sites.
The Wolverine resource is estimated at 6.2 million tonnes grading 12.66% zinc, 1.33% copper and 1.55% lead, plus 370.9 grams silver and 1.76 grams gold per tonne.
The presence of selenium has been a concern because it is not easily separated from the metal or sulphur products during smelting and refining.
Expatriate holds a 60% interest in the property, and Atna, the remainder.
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