Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeM
Ore controlStratigraphically controlled, fault related.
Materials
Ore mineralsHematite, Goethite
GangueChert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica
Geology
Host rockIron Formation · Riverton Iron-Formation
AlterationChert and siderite to hematite and goethite in oxidation zones.
Economic & production
Development statusPast Producer
Identification
Deposit ID10079409
MRDS IDW028938
RegionNA
Data scoreB
Coordinates46.08528, -88.63672
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, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO. P. 162.CROWELL, BENEDICT AND MURRAY, C.B., INC., 1914, 1917, 1923, 1927, 1930, THE IRON ORES OF LAKE SUPERIOR (2ND, 3RD, 5TH-7TH EDS.): CLEVELAND, OHIO. PP. 214, 270-271, 243-244, 315, 284-285 RESPECTIVLY.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.