Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeChemical Sediment: Taconite
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeL
Orebody formSTRATABOUND
Ore controlMarquette syncline and negaunee iron formation
Materials
Ore mineralsHematite, Martite, Goethite, Magnetite, Siderite
GangueChert, Ankerite, Feldspar, Chlorite
Geology
Host rockIron Formation · Negaunee Iron-Formation
Associated rock"Palmer Gneiss", "Compeau Gneiss"
StructureMarquette syncline - 33 miles - plunging west ; regional trends: E-W
Economic & production
Development statusProducer
First production1929
Discovery year1929
Identification
Deposit ID10068372
MRDS IDW001397
RegionNA
Data scoreA
Coordinates46.4475, -87.63808
References
LAKE SUPERIOR IRON ORES, 1938, P. 120.LAKE SUPERIOR IRON ORES, 1952, P. 91.VAN HISE AND BAYLEY, 1897, U. S. G. S. MONOGRAPH 28.JAMES, H. L., 1955, ZONES OF REGIONAL METAMORPHISM. IN THE PRECAMBRIAN OF NORTHERN MICH., G. S. A. BULL., VOL. 66, P. 1455 - 1488U.S. BUREAU OF MINES, 1954-1994, MINERALS YEARBOOK [1953-1993]: WASHINGTON, D.C., U. S. GOVERNMENT PRINTING OFFICE, VARIOUS VOLUMES.1971 GEOL MAP G. SIMMONS8) LAKE SUPERIOR IRON ORES, 1952, P. 91. MINERALS YEARBOOKS FOR THE APPROPRIATE YEARS.MINERALS YEARBOOK, 1989, V. II.