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An expert said that an ongoing strike at the Chuquicamata copper mine in Chile is likely to cost miner Corporacion Nacional del Cobre de Chile $50 million for a two-week halt in production, Bloomberg reported. Juan Carlos Guajardo, an official at Chile-based consultancy firm Plusmining, said that the strike, which began on June 14, could cut copper production by 10,000 metric tons and cause a global supply deficit.