Commodities
PrimaryCopper
SecondarySilver
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeS
Orebody formTABULAR
Ore controlOphitic flow having distinctive plagioclase phenocrysts.
Materials
Ore mineralsCopper
GangueFeldspar, Epidote, Quartz, Calcite
Geology
Host rockBasalt · "Kearsarge Amygdaloid", "Portage Lake Volcanics"
Economic & production
Development statusPast Producer
Production years1910-1920
First production1910
Last production1920
Identification
Deposit ID10082870
MRDS IDW062233
Alternate namesCaldwell, Tecumseh
RegionNA
Data scoreB
Coordinates47.21306, -88.46866
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.CORNWALL, H.R., AND WRIGHT, J.C., 1956, GEOLOGIC MAP OF THE LAURIUM QUADRANGLE, MICHIGAN: USGS MAP MF-47, SCALE 1:24000BUTLER, B.S., AND BURBANK, W.S., 1929, P. 88.