Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeChemical Bedded
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeY
WorkingsUnderground
Orebody formSTRATABOUND
Materials
Ore mineralsHematite, Goethite
Geology
Host rockIron Formation · Negaunee Iron-Formation
StructureMarquette syncline; regional trends: E-W.
Economic & production
Development statusPast Producer
Production yearsMATHER PRODUCED IRON ORE FROM 1941 TO 1979. IT WAS THE LAST UNDERGROUND IRON MINE IN MICHIGAN. IRON ORE SHIPMENTS FROM STOCKPILES CONTINUED AT LEAST TO 1983. CRUDE RED HEMATITE IRON OXIDE-PIGMENT SHIPMENT FROM STOCKPILES CONTINUED TO AT LEAST 1992.
First production1941
Last production1979
Identification
Deposit ID10068367
MRDS IDW001392
RegionNA
Data scoreB
Coordinates46.49861, -87.6328
References
VAN HISE AND BAYLEY, 1897, U. S. GEOLOGICAL SURVEY MONOGRAPH 28.LAKE SUPERIOR IRON ORE ASSOC., 1952, LAKE SUPERIOR IRON ORES.JAMES, H. L., 1955, ZONES OF REGIONAL METAMORPHISM. IN PRECAMBRIAN OF NORTHERN MICHIGAN, G. S. A. BULL., VOL. 66, P. 1455 - 1488.GRATON-SALES VOL. A. I. M. E., 1968, MARQUETTE DIST., (IN) ORE DEPOSITS OF THE U. S., 1933 - 1967, P. 508 - 517.U.S. BUREAU OF MINES, 1954-1994, MINERALS YEARBOOK [1953-1993]: WASHINGTON, D.C., U. S. GOVERNMENT PRINTING OFFICE, VARIOUS VOLUMES.PUFFETT: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 788.1970 GEOL MAP G. SIMMONS; JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, MARQUETTE COUNTY, P. 15-16, 300-304, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.MINERALS YEARBOOKS FOR APPROPRIATE YEARS.