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County and State Owner Source of copper Annual production (thousand tonnes) 1 Morenci: Greenlee County, Arizona: Freeport-McMoRan (72%), Sumitomo Group (28%) Open pit, copper-molybdenum ore, producing copper cathode, copper and molybdenum concentrates 286 (2021) [2] 2
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]
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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A number of copper mines operated in Orange County from 1809 to 1958. [64] At least five copper mines operated along a belt 20 miles long and oriented NNE-SSW. Until the opening of the Michigan copper district in 1844, Vermont was the leading copper-producing state. The ore was chalcopyrite with pyrite and pyrrhotite in sericite schist host ...
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 ...
Native American opposition to Rio Tinto and BHP's Resolution Copper mine could prove crucial for the 2024 U.S. presidential vote in the battleground state of Arizona, underscoring the high tension ...
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.