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Sierrita Mine : ウィキペディア英語版 | Sierrita Mine
The Sierrita Mine is a large copper mine located in the Sierrita Mountains of Arizona, in the southwestern part of the United States. Sierrita was operated by Phelps Dodge and represents one of the largest copper reserves in the United States and in the world. The deposit had estimated reserves (in 2006) of 907 million metric tons of ore grading 0.26% copper and 0.03% molybdenum along with additional 2.4 billion tons at 0.21% copper and 0.02% molybdenum.〔Minerals Yearbook, 2006, V. 2, Area Reports, Domestic; U. S. Department of the Interior, p. 5-2〕 The mine is located in southern Pima County, southwest of Tucson and west of Green Valley-Sahuarita. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Sierrita Mine」の詳細全文を読む
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