Copper mining in the United States, Lists of copper mines in the United States, Copper mining in Arizona, Copper mining in Michigan, Kennecott Utah Copper, Native copper, Burra Burra Mine (Ducktown, Tennessee), Bingham Canyon Mine, Porphyry copper deposit, Tubal Cain mine, Chalcopyrite, Anaconda Copper Mine (Montana), Stillwater igneous complex, Anaconda Copper Mine (Nevada), Copper extraction techniques