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The Morenci Mine is a large copper mine located near Morenci, Arizona, United States. Morenci represents one of the largest copper reserves in the United States and in the world, having estimated reserves of 3.2 billion tonnes of ore grading 0.16% copper. It is located in Greenlee County, just outside the communities of Morenci and Clifton. Freeport-McMoRan is the principal owner and, since 2016, Sumitomo Group has owned a 13% interest in the mine.