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Mining Companies
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Rio Tinto is a leading global mining and metals company. Our focus is on finding, mining and processing the Earth's mineral resources in order to maximise value for our shareholders.
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he Sierrita mine is a porphyry copper deposit that has oxide and secondary sulfide mineralization, and primary sulfide mineralization. The predominant oxide copper minerals are malachite, azurite and chrysocolla. Chalcocite is the most important secondary copper sulfide mineral, and chalcopyrite and molybdenite are the dominant primary...
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The Spring Creek Mine is located in Montana approximately 35 miles north of Sheridan, Wyoming. The mine extracts thermal coal from the Anderson-Dietz Seam, which averages approximately 80 feet in thickness.
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