Deposit
Model96: Native Cu
Deposit sizeS
Orebody formFISSURE
Ore controlAmygdaloidal flow top
Materials
Ore mineralsCopper
GangueCalcite, Quartz, Prehnite, Epidote
Geology
Host rockBasalt · Portage Lake Volcanics
Economic & production
Development statusPast Producer
Production years1872, 1877, 1878, 1920-25
First production1872
Last production1967
Identification
Deposit ID10082846
MRDS IDW062204
RegionNA
Data scoreB
Coordinates47.38111, -88.34865
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.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.BUTLER AND BURBANK, 1929, P. 95.