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World's biggest copper mine to make inroads underground

Marc Howe | October 12, 2012 | 1:00 am Base Metals Europe Latin America Copper 

The Chuquicamata mine in Chile - the world's largest open cut copper mine, will commence underground operations after nearly a century of open-cut production. The San Francisco Chronicle reports that the mine's colossal size and and depth have made operations...

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