Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeL
Ore controlStructural-footwall quartzite and cross-cutting dikes forming ore troughs.
Materials
Ore mineralsHematite
GangueChert, Pyrite, Martite
Geology
Host rockIron Formation · Ironwood Iron-Formation
AlterationChert to hematite in oxidation zones.
Economic & production
Development statusPast Producer
First production1885
Last production1961
Identification
Deposit ID10079773
MRDS IDW030500
RegionNA
Data scoreB
Coordinates46.48333, -89.9201
References
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 59.CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, 1914, 1917, 1920, 1923, 1927, 1930, THE IRON ORES OF LAKE SUPERIOR (1ST-7TH EDS.): CLEVELAND, OHIO. PP. 91-92, 179-180, 233-234, 210, 260, 279-280, 252 RESPECTIVELY.PRINZ, W.C., HUBBARD, H.A., 1975, PRELIMINARY MAP OF THE WAKEFIELD QUADRANGLE, GOGEBIC COUNTY, MICHIGAN. GEOLOGICAL SURVEY DIVISION OF THE MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN.JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, GOGEBIC COUNTY, P. 232-237, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.