Description
A. Randall Discovered Low-Grade Magnetic Material During The Survey Of The Fourth Principal Meridian.
Commodities
PrimaryIron
Commodity typeM
Deposit
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeS
WorkingsUnderground
Orebody formSTRATABOUND
Ore controlOxidation And Leaching Of Unaltered Banded-Iron Formation To Soft Iron-Oxide Ore Bodies.
Materials
Ore mineralsGoethite, Hematite
Geology
Host rockIron Formation · Ironwood 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 Mellen, Wi, And A Bit Farther W.
Tectonic settingCanadian Shield
AlterationGogebic Iron Range Is In The Chlorite Metamorphic Zone In The Least Metamorphosed Area Of The Upper Peninsula.
Economic & production
Development statusPast Producer
Production years1890
First production1890
Last production1890
Discovery year1848
Identification
Deposit ID10082666
MRDS IDW062015
RegionNA
Data scoreB
Coordinates46.33611, -90.49206
References
EMATITSCHMIDT, 1980: USGS BULLETIN 1460LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, P. 60.