Commodities
PrimaryCopper
SecondarySilver
Commodity typeM
Deposit
Deposit typeVein
Model96: Native Cu
Deposit sizeS
Ore controlFissure
Materials
Ore mineralsCopper, Silver
Geology
Host rockBasalt · Portage Lake Volcanics
StructureSyncline, Fissure cutting the Greenstone flow, mining activity south of flow
Economic & production
Development statusPast Producer
Production years1846-1905 FOR PHOENIX MINE 1865-1867 FOR BAY STATE MINE
First production1844
Last production1931
Identification
Deposit ID10082616
MRDS IDW060053
Alternate namesRobbins Mine (West Vein), Atlas Mine, Bay State (1871), St. Clair, Consolidated (1899); Phoenix Fissure (Old & New), Phoenix Ashbed Mines
RegionNA
Data scoreB
Coordinates47.38528, -88.29476
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PPCORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE PHOENIX QUADRANGLE, MICHIGAN: USGS MAP GQ-34, SCALE 1:24000JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 23-24, 211-227, 233-235, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.BUTLER AND BURBANK, 1929