Description
A. Randall discovered low-grade magnetic material during the survey of the fourth principal meridian.
Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeBanded Iron-Rich Sedimentary Rocks
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeM
WorkingsUnderground
Orebody formSTRATABOUND
Ore controlOxidation and leaching of unaltered banded-iron formation to soft iron-oxide ore bodies.
Geology
Host rockIron Formation · Ironwood Iron-Formation
StructureN-dipping sediments; regional trends are east to west., An E-W linear iron formation going from Gogebic, MI, to Ironwood,MI, and to
AlterationGogebic iron range is in the chlorite metamorphic zone in the least metamorphosed area of the upper peninsula.
Economic & production
Development statusPast Producer
Production years1884 TO 1926
First production1884
Last production1926
Identification
Deposit ID10082653
MRDS IDW062001
RegionNA
Data scoreB
Coordinates46.45139, -90.17178
References
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952: CLEVELAND, OHIO, P. 53.SCHMIDT, 1980, USGS BULLETIN 1460.JOHNSON, A.M., AND GROTH, E.H.,1998, INVENTORY OF UNDERGROUND MINES, GOGEBIC COUNTY, P. 21-27, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.