Mine detail: Alpha Mine

Previously called 'Alpha Porter'

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Location: Iron County, Michigan, United States, North America
Lat / long: 46.04472, -88.38727
dep_id: 10106115
mrds_id: W028652
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.
Reporter: Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)
hrock_type: Iron Formation
Year first produced: 1882
yr_lst_prd: 1903
References:
  • Deposit:: JAMES, H. L., DUTTON, C. E., PETTIJOHN, F.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, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO, P. 144.
  • Deposit:: JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 1-2, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
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