Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeS
Orebody formTABULAR
Materials
Ore mineralsCopper
GangueFeldspar, Epidote, Quartz, Calcite
Geology
Host rockPortage Lake Volcanics
StructureSyncline
Economic & production
Development statusPast Producer
First production1870
Last production1921
Identification
Deposit ID10082854
MRDS IDW062213
Alternate namesNaumkeag Exploration
RegionNA
Data scoreB
Coordinates47.11167, -88.59811
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.WHITE, W.S., 1956, GEOLOGIC MAP OF THE CHASSELL QUADRANGLE, MICHIGAN: USGS MAP MF-43, SCALE 1:24000JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, HOUGHTON COUNTY, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.