Mine detail: Tobin Mine

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Location:	Iron County, Michigan, United States, North America
Lat / long:	46.08833, -88.36032
dep_id:	10079369
mrds_id:	W028624
Commodity type:	metallic
Major mineral:	Iron
Operation type:	Underground
Deposit type:	Secondary Enrichment
Production size:	Unknown
Development status:	Past Producer
ore:	Hematite, Goethite
gangue:	Chert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica
model:	241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
alteration:	Chert and siderite to hematite and goethite in oxidation zones.
ore_ctrl:	Structurally controlled on synclinal flank, fault related.
Reporter:	Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)
hrock_type:	Iron Formation
Year first produced:	1891
yr_lst_prd:	1963
References:	Deposit:: 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. Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES, (2ND ED.): CLEVELAND, OHIO P. 123. Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, 1914, 1917, 1920, 1923, THE IRON ORES OF LAKE SUPERIOR (1ST, 2ND, 3RD, 4TH, 5TH EDS.): CLEVELAND, OHIO. PP. 127-128, 215, 272, 245 AND 295 RESPECTIVELY. Deposit:: HANNA, T. A., THE STATE OF MICHIGAN MINES AND MINERAL STATISTICS, MARQUETTE, MICHIGAN. P. 81. Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, 320-327, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.