IOCG skarn, underground, producing copper concentrateĬopper-mining projects not yet in production Mine Porphyry copper open pit, producing copper cathode Gold-copper ore, concentrated and leached Underground mine producing nickel and copper concentrates Open pit copper-molybdenum ore, producing copper cathode, molybdenum concentrate, gold, silver, sulfuric acidĬopper-molybdenum ore, concentrated and leachedĬopper-gold-molybdenum ore, open pit, concentrate products Open pit, copper-molybdenum ore, producing copper cathode, copper and molybdenum concentrates mine copper production.įreeport-McMoRan (72%), Sumitomo Group (28%) Leading copper-producing mines in the U.S., 2018-2021, in order of output: The mines on this list account for more than 99% of U.S. The following lists of copper mines in the United States: (Alaska and Hawaii produced no copper in 2003.) Source:USGS Mines producing copper in the US in 2003.
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