Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeLode
Model96: Native Cu
Deposit sizeS
Orebody formTABULAR
Ore controlFragmental flow top
Materials
Ore mineralsCopper
GangueCalcite, Prehnite
Geology
Host rockBasalt · "Iroquois Amygdaloid", "Portage Lake Volcanics"
StructureAmygdaloidal flow top
Economic & production
Development statusPast Producer
Production yearsMINED MORE OR LESS CONTINUOUSLY FROM 1942 TO 1968.
First production1942
Last production1968
Identification
Deposit ID10082867
MRDS IDW062230
RegionNA
Data scoreC
Coordinates47.32306, -88.35783
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., 1955, BEDROCK GEOLOGY OF THE MOHAWK QUADRANGLE, MICHIGAN: USGS MAP GQ-54, SCALE 1:24000WHITE, W.S., 1968, THE NATIVE COPPER DEPOSITS OF NORTHERN MICHIGAN: IN J.D. RIDGE (EDITOR) ORE DEPOSITS OF THE UNITED STATES 1933-1967 (GRATON-SALES); AM. INSTIT. MIN. METALL. PETROL. ENG., V. 1, P. 303-325.WEEGE, R.J., AND POLLACK, J.P., 1971, RECENT DEVELOPMENTS IN THE NATIVE COPPER DISTRICT OF MICHIGAN: IN W.S. WHITE, (EDITOR) GUIDEBOOK FOR FIELD CONFERENCE, MICHIGAN COPPER DISTRICT, SEPT. 30-OCT. 2, 1971, SOC. ECON. GEOL., P. 19-43.WEEGE, R.J., AND POLLACK, J.P., 1971; WHITE, W.S., 1968.