from 1998 Engineering & Mining Journal; 5/1/1998
Tenke Mining Corp. (TMC) announced that its final feasibility study indicates that the Tenke Fungurume copper-cobalt deposits in the Congo's (Kinshasa) southern province of Katanga may be among the world's lowest- cost producers of copper and cobalt.
Company projections are for a cost of 10 [cents]/lb, after cobalt credits based on a price of $8/lb cobalt. This cost becomes negative at $10/lb cobalt.