Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeM
Orebody formTABULAR
Materials
Ore mineralsCopper
GangueQuartz, Epidote, Pumpellyite-(Mg), Calcite
Geology
Host rockBasalt · "Baltic Amygdaloid Lode", "Portage Lake Volcanics"
AlterationQuartz-pumpellyite
Economic & production
Development statusPast Producer
Production years1898 THROUGH 1925, BUT NOT LATER THAN 1968.
First production1898
Last production1968
Identification
Deposit ID10106400
MRDS IDW062225
RegionNA
Data scoreB
Coordinates47.06333, -88.63478
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.WHITE, W.S., AND WRIGHT, J.C., 1956, GEOLOGIC MAP OF THE SOUTH RANGE QUADRANGLE, MICHIGAN: USGS MAP MF-48, SCALE 1:24000BUTLER AND BURBANK, 1929, P. 70.