Workers at BHP's Spence copper mine in Chile approve labour contract

Unionised workers at BHP Billiton's Spence copper mine in northern Chile have approved a new labor contract, union president Ronald Salcedo said on Monday. Spence is one of the Anglo-Australian miner two mines in Chile. The other, Escondida, the world' largest copper mine, earlier this month entered into labour negotiations following a historic strike that shut down the mine for 44 days last year, depriving BHP of $1-billion in production.