was later subsumed by the BHP Billiton corporate identity, and a significant name in Australian mining history ceased to be used. Operations When it was taken over it had three main businesses: Mount Keith and Leinster nickel mines, Kambalda concentrator, Kalgoorlie nickel smelter and Kwinana nickel refinery, all in Western Australia Olympic Dam mine copper-uranium-gold mine in South Australia. In 2005, this mine was estimated to contain 33% of the world's known uranium reserves. The Phosphate Hill mine and associated phosphate fertiliser production business in Queensland, which became known as Southern Cross Fertilisers following the BHP Billiton takeover; and Hi Fert, a blending and distribution network supporting Australia's eastern states. BHP Billiton sold Hi Fert to a joint venture of Elders and AWB in December 2005 and Southern Cross Fertilisers to Incitec Pivot in May 2006. Former Agnew Gold Mine Beta Hunt Mine Burbanks Gold Mine Hill 50 Gold Mine Nifty Copper Mine Norseman Gold Mine St Ives Gold Mine Three Springs Mine References External links Company website Companies based in Melbourne Companies formerly listed on the Australian Securities Exchange Defunct mining companies of Australia Gold mining companies of Australia Nickel mining companies Non-renewable resource companies established in 1933 Non-renewable resource companies disestablished in 2005 Uranium mining companies of Australia 1933 establishments in Australia 2005 disestablishments in Australia