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Mount Keith Mine : ウィキペディア英語版
Mount Keith Mine

Mount Keith Mine is an open pit nickel mine in Western Australia. It is operated by BHP Billiton. The site's closest landmark is the town of Wiluna, to the north.
==Overview==

The mine is located on the north end of the long Norseman-Wiluna Greenstone belt, with nickel sulfide deposits of the dyke-like or sill deposit type. The important known nickel deposits are in the ultramafic rocks of the lower cycle, around 2700 Ma old. In 1971, the mine was thought to be able to provide 10% of the world's demand for nickel; in 1992 it was estimated as containing 270 million tons of sulfide ore, grading 0.6% nickel, enough for about twenty years.
Owned by WMC Resources Limited, it was acquired by BHP in June 2005.〔(MINDEX website ) Government website on mining in Western Australia, accessed: 10 September 2009〕
In 2009, BHP reduced the mine's activity, laying off 300 employees.〔 〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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