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 sizeM
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 statusProducer
Production years1886 TO AT LEAST 1950, EXCEPT FOR 1921.
First production1886
Discovery year1848
Identification
Deposit ID10082661
MRDS IDW062010
Alternate namesOttawa, Odanah, 33 Co. Mine, Trimble, Moore, Bourne, Jupiter.
RegionNA
Data scoreB
Coordinates46.42806, -90.23372
References
EMATITSCHMIDT, 1980: USGS BULLETIN 1460LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, P. 56-57.