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Porphyry copper deposits represent an important resource and the dominant source of copper that is mined today to satisfy global demand. [6] Via compilation of geological data, it has been found that the majority of porphyry deposits are Phanerozoic in age and were emplaced at depths of approximately 1 to 6 kilometres with vertical thicknesses on average of 2 kilometres. [6]
Pittsburgh & Boston Mining Co. Vein native copper Productive 1845 to 1887 Victoria Mine: Victoria, Ontonagon County, Michigan: Victoria Copper Mining Company Closed in 1921 C&H: Calumet, Houghton County, Michigan: C&H Mining Co. Native Copper Closed in the late 1960s Anaconda: Butte, Silver Bow County, Montana: Anaconda Copper: Closed since ...
As of 2010, Kennecott Utah Copper was the second largest copper producer in the US, and provided about 13-18% percent of the U.S.'s copper needs. [ 32 ] [ 33 ] It is one of the top producing copper mines in the world, with production at more than 18.7 million short tons (16.7 million long tons; 17.0 Mt).
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It showed the world's largest copper deposits existed in Balkhab district of Sar-e-Pol. The copper mine was discovered near a river, an area which might hold gold reserves as well. The government launched tenders in late 2011 for the Balkhab copper deposit, which had reserves of about 45 Mt of copper.
A Native American group on Wednesday asked the U.S. Supreme Court to block Rio Tinto and BHP from gaining access to Arizona land needed to build one of the world's largest copper mines, a last ...
Production trends in the top five copper-producing countries, 1950-2012. This is a list of countries by mined copper production. Copper ore can be exported to be smelted so that a nation's smelter production of copper can differ greatly from its mined production. See: List of countries by copper smelter production.
The U.S. imports nearly half of its copper needs, according to the U.S. Geological Survey, and its copper mine production has dipped 11% since 2021. There are only two domestic copper smelters.