Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeS
Orebody formIRREGULAR
Materials
Ore mineralsCopper
GangueFeldspar, Epidote, Quartz, Calcite
Geology
Host rockPortage Lake Volcanics
StructureSyncline
Economic & production
Development statusProspect
First production1863
Last production1899
Identification
Deposit ID10082860
MRDS IDW062221
Alternate namesSt. Mary's Exploration
RegionNA
Data scoreB
Coordinates47.1675, -88.54116
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 310064, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.