Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeU
Ore controlStructurally controlled in a synclinal body
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
Identification
Deposit ID10079367
MRDS IDW028622
RegionNA
Data scoreB
Coordinates46.0825, -88.3681
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. 159, 119 RESPECTIVELY.CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1920, 1923, 1927, THE IRON ORES OF LAKE SUPERIOR (4TH, 5TH, 6TH EDS.): CLEVELAND, OHIO. PP. 237, 287, 309 RESPECTIVELY.HANNA, T.A., 1902, STATE OF MICHIGAN MINES AND MINERAL STATISTICS, MARQUETTE, MICHIGAN. P. 81.