The Prominent Hill Mine is a major copper, silver and gold mine in north west South Australia, 130 km south-east of Coober Pedy, which has been developed by Oxiana Limited, later to become OZ Minerals. The deposit is an iron oxide copper gold style mineralisation. The mine has cost A$1.15 billion to develop, and it is projected to produce 100,000 tonnes of copper and 115,000 oz of gold in concentrates a year.
Geology And Mineralogy:
The deposit is located in the Gawler Craton and it is hosted mainly in a fault zone where Hiltaba-Suite granites overthrust a Mesoproterozoic volcano-sedimentary sequence. The age of the mineralisation is about 1.58 billion years. It consists of a breccia containing host rock clasts (dolomite, sandstone, andesite) which is intensively hematite, chlorite and sericite altered. Major sulfide minerals are pyrite, chalcopyrite, bornite and chalcocite.