Commodities
PrimaryCopper
Commodity typeM
Deposit
Model96: Native Cu
Deposit sizeS
Geology
Host rockBasalt · Portage Lake Volcanics
StructureJust south of the Greenstone flow
Economic & production
Development statusPast Producer
Production years1845-1857; DISCONTINUOUSLY AFTER THAT
First production1845
Last production1880
Identification
Deposit ID10082621
MRDS IDW060058
RegionNA
Data scoreC
Coordinates47.4, -88.19171
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER NO. 144, 238 PPCORNWALL, H.R., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE EAGLE HARBOR, MICHIGAN: USGS MAP GQ-36, SCALE 1:24000BUTLER AND BURBANK, 1929