A blue ventilation shaft for underground operations, center, sits in the open pit mine at the Sandfire Resources NL copper operations at DeGrussa, Australia, on Sunday, Aug. 2, 2015. Sandfire has new interest from traders in an upcoming tender for copper concentrate, after announcing exploration success at its Monty Prospect, Chief Executive Officer Karl Simich told reporters on Sunday at the DeGrussa mine. Photographer: Carla Gottgens/Bloomberg via Getty Images
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