Arizona is the United States' largest source of copper, primarily mined from a type of ore body known as porphyry copper deposits.

亚利桑那州有美国最丰富的铜矿资源，主要从一种含铜的斑岩矿床(asporphyry copper deposits)中开采。

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Nuclear power is generated using uranium, a metal that is mined as an ore in large quantities, with Canada, Australia and Kazakhstan providing more than half of the world's supplies.

核能是通过铀这种大量开采的矿石金属生成的。加拿大、澳大利亚和哈萨克斯坦占据了全球超过半数的供应量。

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Arizona is the United States' largest source of copper, primarily mined from a type of ore body known asporphyry copper deposits.

亚利桑那州有美国最丰富的铜矿资源，主要从一种含铜的斑岩矿床(asporphyry copper deposits)中开采。

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Rock-breakers work with geologists and surveyors to make sure that only profitable grades of ore are mined.

ECONOMIST: South African gold mining

And tailings are produced in large quantities: on average, 991 tonnes-worth for every 1, 000 tonnes of ore that is mined.

ECONOMIST: Mine pollution

As for individual stocks, there are very few pure platinum plays, as the ore it is mined from also contains nickel and copper.

FORBES: Buy Platinum and Sell Gold