The Gawler craton in South Australia hosts the Olympic Dam Cu-U-Au deposit, the world’s preeminent iron oxide copper-gold (IOCG) deposit and largest uranium resource. With a total resource now standing at 7.7 billion tonnes, Olympic Dam is also one of the world’s largest copper and gold deposits (BHP Billiton, 2007 Annual Report).

The emergence of IOCG deposits as a recognized mineral deposit class (Hitzman et al., 1992) has been followed by increasing interest in these deposits from explorers and researchers. IOCG deposits are attractive exploration targets because of their favorable grade-tonnage characteristics, credits of gold and other metals...

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