Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit sizeL
Orebody formLINEAR
Ore controlInavailability Of Free Oxygen Allowing Ferrous Oxides To Form. Advent Of Photosynthetic Eucaryotic Organisms Releasing O2 2 B.Y. Ago Upset The Oxygen Poor Environment Required For Continued Ferrous Iron Deposition (Garrells, Et Al, 1973).
Materials
Ore mineralsAnkerite, Magnetite, Siderite
GangueCalcite, Chert
Geology
Host rockIron Formation · Biwabik Iron Formation
AlterationMetamorphism In East Mesabi Range. French (1973) Identified Three Distinct Mineral Assembleges Related To Temperature And Pressure Conditions.
Economic & production
Development statusProducer
Identification
Deposit ID10072828
MRDS IDW018511
Alternate namesPilotac Mine
RegionNA
Data scoreB
Coordinates47.54471, -92.65464
References
BAYLEY, R.W. AND JAMES, H.L., 1973, ECON. GEOL. V. 68, N. 7, PP. 934-1004.FRENCH, B.V., 1973, ECON. GEOL. V.68, N. 7, PP. 1063-1074.LA BERGE, G.L., 1973, ECON. GEOL., V. 68, N. 7, PP. 1098-1109.GARRELS, R.M., PERRY, E.A., AND MACKENZIE, F.J., 1973, ECON. GEOL., VOL. 68, N. 7, PP. 1173-1179.W. D. TRETHEWEY, MINING DIR. OF MINN. 1974, 1978, 1980.