Michigan · Keweenaw County
Past Producer
New York and Michigan Exploration
Keweenaw County, Michigan, United States
Copper
Land & claims · BLM · live
Loading land status…
Surface manager + active mining claims at this point, live from BLM. The "open to location" notes are a general 1872-Mining-Law guide, not BLM output — decision-support only; verify with BLM MLRS and on the ground before staking or entry.
Commodities
PrimaryCopper
Commodity typeMetallic
Deposit
Model96: Native Cu
Deposit sizeSmall
Orebody formFISSURE
Ore controlFissure
Materials
Ore mineralsCopper
GangueCalcite, Prehnite, Quartz, Datolite, Laumontite, Epidote, Chlorite
Geology
Host rockPortage Lake Volcanics
Economic & production
Development statusPast Producer
Production years1846-47, 1852-53
First production1846
Last production1853
Community notes
No community notes yet. Be the first to add field knowledge, history, or access tips.
Contribute
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.CORNWALL, H. R., 1955, BEDROCK GEOLOGY OF THE FORT WILKINS QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 74, 1:24,000.BUTLER AND BURBANK, 1929.
Identification
Deposit ID10082835
MRDS IDW062192
RegionNA
Data scoreB
Coordinates47.43556, -87.81002
Base: USGS MRDS (public domain, frozen 2011). Community notes © their authors, CC-BY. Land data live from BLM.