Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeU
WorkingsSurface/Underground
Ore controlStructurally controlled by faulting.
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 production1953
Last production1968
Identification
Deposit ID10106112
MRDS IDW028641
RegionNA
Data scoreB
Coordinates46.1, -88.38977
References
JAMES, H.C., 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, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 114.REED, R.C., 1975, ONE THOUSAND MILLION TONS, MICHIGAN IRON ORE SHIPMENTS THROUGH 1974, CIRCULAR 12, GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPARTMENT OF NATURAL RESOURCES, LANSING, MICHIGAN. P. 10.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 154-156, MICHIGAN DEPARTMENT OF NATURAL RESOURCES,