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 Deposits
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.
Materials
Ore mineralsHematite, Goethite
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 years1886 TO AT LEAST 1950, EXCEPT FOR 1932.
First production1886
Last production1961
Discovery year1848
Identification
Deposit ID10082662
MRDS IDW062011
Alternate namesIron King, Mount Hope, Bonnie
RegionNA
Data scoreB
Coordinates46.45694, -90.12233
References
SCHMIDT, 1980: USGS BULLETIN 1460. JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, GOGEBIC COUNTY, P. 112-128, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.REED, 1975