<Table> <Tr> <Td> </Td> <Td> This article's lead section does not adequately summarize key points of its contents . Please consider expanding the lead to provide an accessible overview of all important aspects of the article . Please discuss this issue on the article's talk page . (September 2010) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article's lead section does not adequately summarize key points of its contents . Please consider expanding the lead to provide an accessible overview of all important aspects of the article . Please discuss this issue on the article's talk page . (September 2010) </Td> </Tr> <P> Mining in Australia is a significant primary industry and contributor to the Australian economy . Historically, mining booms have also encouraged immigration to Australia . Many different ores and minerals are mined throughout the country . </P> <P> Mining contributed significantly to preventing potential bankruptcy for the early colonies in Australia . Silver and later copper were discovered in South Australia in the 1840s, leading to the export of ore and the immigration of skilled miners and smelters . The first economic minerals in Australia were silver and lead in February 1841 at Glen Osmond, now a suburb of Adelaide in South Australia . Mines including Wheal Gawler and Wheal Watkins opened soon after . The value of these mines was soon overshadowed by the discovery of copper at Kapunda (1842), Burra (1845) and in the Copper Triangle (Moonta, Kadina and Wallaroo) area at the top of Yorke Peninsula (1861). </P>

Which of the following is not mined in australia