Mine detail: Gratiot Copper Mine

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Location: Keweenaw County, Michigan, United States, North America
Lat / long: 47.31472, -88.34504
dep_id: 10082844
mrds_id: W062202
Commodity type: metallic
Major mineral: Copper, Silver
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Copper
gangue: Calcite, Quartz, Prehnite, Epidote
orebody_fm: FISSURE
model: 96: Native Cu
ore_ctrl: Lode
Reporter: Sutphin, D.M. (Cannon, W.F.), Mason Jr., G.T.
hrock_unit: Portage Lake Volcanics, Kearsarge Amygdaloid
hrock_type: Basalt
References:
  • Deposit:: BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.
  • Deposit:: DAVIDSON, E.S., ESPENSHADE, G.H., WHITE, W.S., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE MOHAWK QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 54, 1:24,000.
  • Production:: BUTLER AND BURBANK, 1929, P. 86.
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