Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeS
Ore controlStructural-footwall quartzite and cross-cutting dikes form 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 production1953
Last production1955
Identification
Deposit ID10079775
MRDS IDW030504
Alternate namesPlymouth-Loomis
RegionNA
Data scoreB
Coordinates46.47139, -89.9401
References
LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO, P. 56.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.REED, R.C., 1975, ONE THOUSAND MILLION TONS-MICHIGAN IRON ORE SHIPMENTS THROUGH 1974, CIRCULAR 12, GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN.