Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeU
Ore controlStratigraphically controlled, fault related.
Materials
Ore mineralsHematite, Goethite
GangueChert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica
Geology
Host rockIron Formation
AlterationChert and siderite to hematite and goethite in oxidation zones.
Economic & production
Development statusPast Producer
First production1919
Last production1923
Identification
Deposit ID10106126
MRDS IDW028960
RegionNA
Data scoreB
Coordinates46.11389, -88.6595
References
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.LAKE SUPERIOR IRON ORE ASSOCIATION, 1938, 1952, LAKE SUPERIOR IRON ORES (1ST, 2ND EDS.): CLEVELAND, OHIO. PP. 147, 110 RESPECTIVELY.CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1923, THE IRON ORES OF LAKE SUPERIOR (5TH ED.): CLEVELAND, OHIO. P. 271.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 63-66, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.