Mine detail: Crystal Falls Mine

Previously called ''

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Location

Lat / long: 46.11111, -88.30615

Resource(M)

Primary: Iron
Ore: Hematite, Goethite
Gangue: Chert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica

Production

Operation type: Underground
Deposit type: Secondary Enrichment
Production size: Unknown
Development status: Past Producer
First production started: 1890
Last production ended: 1913

Geology

Host type:Iron Formation
Alteration processes:Chert and siderite to hematite and goethite in oxidation zones.

References

MRDSW028644
DEP10079384
Reference{Deposit:: JAMES, H.L., DUTTON, C.E., PETTIJOHN, F.J., WIER, K.L., 1968, GEOLOGY AND ORE DEPOSITS OF THE IRON RIVER, CRYSTAL FALLS DISTRICT, IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1968, PP. 45-56, 88-110}{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 112.}{Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, THE IRON ORES OF LAKE SUPERIOR (1ST ED.): CLEVELAND, OHIO. PP. 108-109}{Deposit:: HANNA, T.A., 1962, STATE OF MICHIGAN MINES AND MINERAL STATISTICS, MARQUETTE, MICHIGAN. P. 80.}{Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 104-106, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
ReporterYeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)