Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeBanded Iron-Rich Sedimentary Deposits
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeS
WorkingsSurface/Underground
Orebody formSTRATABOUND
Materials
Ore mineralsHematite, Magnetite, Goethite
GangueQuartz
Geology
Host rockIron Formation · Vulcan Iron Formation
StructureMajor troughs into which Iron fm. has slumped; regional trends are E-W to N
AlterationLeaching of silica or replacement by iron oxides or a combination of these processes.
Economic & production
Development statusPast Producer
Production years1881-1925 EXCEPT FOR 1893, 1904-1905, 1910, 1913, AND 1915-1918.
First production1881
Last production1936
Discovery year1849
Identification
Deposit ID10082692
MRDS IDW062042
Alternate namesChapin, Hewitt, Dessau
RegionNA
Data scoreB
Coordinates45.82194, -88.05309
References
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES, 2D ED.: CLEVELAND, OHIO, LAKE SUPERIOR IRON ORE ASSOCIATION, 334 P.BAYLEY, R.W., AND OTHERS, 1966, GEOLOGY OF THE MENOMINEE IRON-BEARING DISTRICT, MICHIGAN AND WISCONSIN: U.S.G.S. PROFESSIONAL PAPER 513, 96 P. VAN HISE, C.E.., AND LEITH, C.E.., 1911, THE GEOLOGY OF THE LAKE SUPERIOR REGION: U.S.G.S MONOGRAPH 52, 641 P.LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, P. 107-128.