Mine detail: Eureka-Asteroid Mine

Previously called 'Asteroid-North Mikado MineWells & Miner Mine'

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Location

Lat / long: 46.47583, -89.98427

Resource(M)

Primary: Iron
Ore: Hematite
Gangue: Chert, Pyrite, Martite

Production

Operation type: Underground
Deposit type: Secondary Enrichment
Production size: Large
Development status: Past Producer
First production started: 1890
Last production ended: 1926

Geology

Host rock:Ironwood Iron-Formation
Host type:Iron Formation
Alteration processes:Chert to hematite in oxidation zones

References

MRDSW030505
DEP10079776
Reference{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO, PP. 54-55.}{Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, 1914, 1917, 1920, 1923, THE IRON ORES OF LAKE SUPERIOR (1ST-5TH EDS.): CLEVELAND, OHIO, PP. 83-84; 163-164, 168-169; 214-215, 220-221; 192-193, 197-198; 242-243, 247-248.}{Deposit:: PRINZ, W.C., HUBBARD, H.A., 1975, PRELIMINARY MAP OF THE WAKEFIELD QUADRANGLE, GOGEBIC COUNTY, MICHIGAN. GEOLOGICAL SURVEY DIVISION OF THE MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN.}{Deposit:: JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, GOGEBIC COUNTY, P. 49-62, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
ReporterMason Jr., G.T., Anderson, Arlene (M. Gere), Yeager, Keith (Cannon, W.), Sutphin, D.M.