Mine detail: Dunn Mine

Previously called 'Dunn-Richards Mine;'

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Location: Iron County, Michigan, United States, North America
Lat / long: 46.07139, -88.37448
dep_id: 10079382
mrds_id: W028642
Commodity type: metallic
Major mineral: Iron
Operation type: Surface-Underground
Deposit type: Secondary Enrichment
Production size: Medium ammount of material produced
Development status: Past Producer
ore: Hematite, Goethite
gangue: Chert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica
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: 1887
yr_lst_prd: 1915
References:
  • Deposit:: JAMES, H.L., DUTTON, C.E., PETTIJOHN, F.T., 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:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, 1914, 1917, THE IRON ORES OF LAKE SUPERIOR (1ST, 2ND, 3RD EDS.): CLEVELAND, OHIO. PP. 111-112, 194-195, 250 RESPECTIVELY.
  • Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO. P. 158.
  • Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 140-142, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
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