Mine detail: Davidson Group Mines

Previously called 'Gleason Explorations'

Location:	Iron County, Michigan, United States, North America
Lat / long:	46.11806, -88.64394
dep_id:	10079398
mrds_id:	W028924
Commodity type:	metallic
Major mineral:	Iron
Operation type:	Underground
Deposit type:	Secondary Enrichment
Production size:	Medium ammount of material produced
Development status:	Past Producer
ore:	Limonite, 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 limonite, hematite, goethite in oxidation zones.
ore_ctrl:	Stratigraphically controlled, fault related.
Reporter:	Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere), Yeager, Keith (Cannon, W.)
hrock_unit:	Riverton Iron-Formation
hrock_type:	Iron Formation
Year first produced:	1911
yr_lst_prd:	1953
prod_yrs:	THE DAVIDSON MINE SHUT DOWN ON 11 AUG 1953; ITS ORE EXHAUSTED.
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. PP. 112-113. Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1911, 1914, 1917, 1920, 1923, 1927, 1930, THE IRON ORES OF LAKE SUPERIOR (1ST-7TH EDS.): CLEVELAND, OHIO. PP. 110-111, 193-194, 248-249, 225-226, 275-277, 296-297, 266-267 RESPECTIVELY. Deposit:: REED, R.C., 1975, ONE THOUSAND MILLION TONS, MICHIGAN IRON ORE SHIPMENTS THROUGH 1974, CIRCULAR 12, GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPARTMENT OF NATURAL RESOURCES, LANSING, MICHIGAN, 1975. P. 9. Deposit:: U.S. BUREAU OF MINES, 1954-1994, MINERALS YEARBOOK [1953-1993]: WASHINGTON, D.C., U. S. GOVERNMENT PRINTING OFFICE, VARIOUS VOLUMES. Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 109-116, MICHIGAN DEPARTMENT OF NATURAL RESOURCES,