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
Materials
Ore mineralsHematite, Grunerite, Limonite
GangueMica, Chlorite, Pyrite, Rutile, Stilpnomelane, Siderite
Geology
Host rockIron Formation
AlterationLeaching of silica along with oxidation and iron enrichment in weathering zones.
Economic & production
Development statusPast Producer
First production1890
Last production1913
Identification
Deposit ID10106116
MRDS IDW028658
RegionNA
Data scoreB
Coordinates46.11556, -88.21921
References
BAYLEY, R. W., 1959, GEOLOGY OF THE LAKE MARY QUADRANGLE,IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1959 PP. 40-44.LAKE SUPERIOR IRON ORE ASSOCIATION, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO. P. 158.CROWELL, BENEDICT, AND MURRAY, C. B., INC, 1911, 1914, THE IRON ORES OF LAKE SUPERIOR (1ST, 2ND EDS.): CLEVELAND, OHIO. PP. 121, 205 RESPECTIVELY.SECTION FILES, MICHIGAN GEOLOGICAL SURVEY, OLIVER IRON MINING CO., SECTION FILES OF THE GEOLOGICAL SURVEY DIVISION OF THE MICHIGAN DEPARTMENT OF NATURAL RESOURCES, LANSING, MICHIGAN.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 247-250, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.