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, associated with faulting.
Materials
Ore mineralsHematite, Goethite, Limonite
GangueChert, Manganite, Sericite, Chlorite
Geology
Host rockIron Formation
AlterationChert to hematite (goethite, limonite) in oxidation zones.
Economic & production
Development statusPast Producer
First production1951
Last production1954
Identification
Deposit ID10079385
MRDS IDW028646
RegionNA
Data scoreB
Coordinates46.09611, -88.27365
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. 21-23, 88-110.LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 110.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 73-75, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.