Michigan · Keweenaw County
Past Producer
Gratiot Copper Mine
Keweenaw County, Michigan, United States
Copper
Silver
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USGS source ↗
Commodities
Primary
Copper
Tertiary
Silver
Commodity type
M
Economic & production
Development status
Past Producer
Identification
Deposit ID
10267743
Region
NA
Data score
D
Coordinates
47.3147, -88.34504
References
VAN HISE & LEITH 1911 US GEOL SUR MONOGRAPH 52, P575, MAP49