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, Magnetite, Sericite, Chlorite
Geology
Host rockIron Formation
AlterationChert to hematite (goethite, limonite) in oxidation zones.
Economic & production
Development statusPast Producer
First production1890
Last production1914
Identification
Deposit ID10106111
MRDS IDW028637
RegionNA
Data scoreB
Coordinates46.12278, -88.26115
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, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO. P. 155.CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, THE IRON ORES OF LAKE SUPERIOR (1ST ED.): CLEVELAND, OHIO. PP. 117-118.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 191-193, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.