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Copper extraction refers to the methods used to obtaining copper from its ores. ... If the ore is primarily sulfide copper minerals (such as chalcopyrite), the ore is crushed and ground to liberate the valuable minerals from the waste ('gangue') minerals. It is then concentrated using mineral flotation
How Copper Forms in the Earth. To understand how copper is formed, it helps to look at how porphyry deposits—the largest current sources of copper ore—form. ... The high temperatures of volcanic magma creates hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth's crust.
Keweenaw Peninsula near Lake Superior in Michigan is one of the most likely places to find native copper!! Ore is first mined, then put through a series of processes to refine and purify the copper. The USA is the second largest producer of copper in the world. The largest copper mine is found in Utah (Bingham Canyon).