Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeU
Ore controlStructurally controlled on synclinal flank.
Materials
Ore mineralsHematite, Goethite
GangueChert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica
Geology
Host rockIron Formation
AlterationChert and siderite to hematite and goethite in oxidation zones.
Economic & production
Development statusPast Producer
First production1882
Last production1963
Identification
Deposit ID10106113
MRDS IDW028645
Alternate namesShafer Mine, Sheldon & Shafer Mine, Union Mine, Chafter Mine
RegionNA
Data scoreB
Coordinates46.08667, -88.35865
References
JAMES, H.L., DUTTON, C.E., PETTIJOHN, F.J., WIER, K.L., 1968, GEOLOGY AND ORE DEPOSITS OF THE IRON RIVER, CRYSTAL FALLS DISTRICT, IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1968, PP. 45-56, 88-110.LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P.111.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MIINES, IRON COUNTY, P. 90-94, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.