Commodities
PrimaryCopper
Commodity typeM
Deposit
Model96: Native Cu
Deposit sizeS
Orebody formAMYGDALOID LODE
Geology
Host rockBasalt · Portage Lake Volcanics
StructureSyncline, Amygdaloidal basalt flow top
Economic & production
Development statusPast Producer
First production1863
Last production1902
Discovery year1898
Identification
Deposit ID10082634
MRDS IDW060072
RegionNA
Data scoreB
Coordinates47.14917, -88.52922
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 HANCOCK QUADRANGLE, MICHIGAN: USGS MAP MF-46, SCALE 1:24000JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, HOUGHTON COUNTY, SITE ID 310019, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.BULTER AND BURBANK, 1929