Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeM
Orebody formTABULAR
Materials
Ore mineralsCopper
GangueQuartz, Feldspar, Epidote, Pumpellyite-(Mg), Calcite
Geology
Host rockBasalt · "Baltic Amygdaloid", "Portage Lake Volcanics"
AlterationQuartz- pumpellyite
Economic & production
Development statusPast Producer
Production years1902-25 OR LONGER
First production1902
Last production1925
Identification
Deposit ID10082864
MRDS IDW062227
RegionNA
Data scoreB
Coordinates47.03722, -88.66812
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, B.S., AND BURBANK, W.S., 1929, P.82.