Alaska Copper mining in the United States

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the kennecott concentration mill, mines in mountains east


alaska not significant copper producer.


russian explorers discovered copper on kasaan peninsula of prince of wales island in southeastern alaska 1865. mining began in period 1895-1900, , continued until shortly after world war i. copper present chalcopyrite, occurring magnetite, pyrite, garnet, epidote, diopside, , hornblende, in replacement deposits in greenstone. gold , silver recovered byproducts.


copper discovered @ prince william sound in 1897. deposits associated pillow basalts alterered greenstone. basalts interbedded slate , greywacke, faulted, , intruded granitic rocks. principal mines beatson-bonanza mine @ latouche , ellamar mine, accounted 96% of copper produced. other mines midas mine near valdez, threeman mine, , fidalgo-alaska mine @ port fidalgo, alaska. mining began in 1900, , continued until 1930. total production 96,000 tonnes of copper.


historically, largest copper mining district in alaska nizina district, principal mines of (erie mine, jumbo mine, bonanza mine, mother lode mine, , green butte mine) @ kennecott, alaska, 4 miles north of mccarthy. copper present chalcocite in veins , irregular replacements in triassic chitistone limestone. silver produced byproduct. mine @ kennecott gave rise kennecott copper corporation, outlasted mine, , still major mining company. deposit discovered in 1900, , once railroad connection built, mine operated 1911 1938, after kennecott became ghost town. town national historic landmark.


the pebble mine proposed copper-gold-molybdenum mine. deposit large porphyry copper-gold-molybdenum deposit, , if developed major producer of metals.








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