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    Copper is definitely worth mentioning, since copper minerals will dissolve in cyanide solutions, and cause a increased use of cyanide, the coppercyanide complexes formed by the dissolution will tend to inhibit the dissolution of gold in the cyanide solution. Zinc, the element used to precipitate gold from solution, if present in the ore,...

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    Mining investment in Peru, the world's No. 2 copper and zinc producer, is expected to grow 9% this year when compared to 2016, marking the end of a threeyear decline than began in 2014, a report ...

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    Placer mining is used to sift out valuable metals from sediments in river channels, beach sands, or other environments. Insitu mining, which is primarily used in mining uranium, involves dissolving the mineral resource in place then processing it at the surface without moving rock from the ground.

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    Most bauxite, iron, and copper ore is mined by open pit techniques, lead and zinc ore are principally extracted by underground mining methods, and precious metals, particularly gold and most notably in the USA and Australia, tend to be recovered in recent years .

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