Mine detail: Coeur Mine

Previously called 'Mineral PointRainbow MineCoeur
*lene Mines'

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Location

Lat / long:

47.49017, -115.98963

Resource(M)

Primary:	Silver
Secondary:	Antimony, Copper
Tertiary:	Zinc, Lead, Gold
Ore:	Tetrahedrite, Galena, Sphalerite, Stibnite, Chalcopyrite, Silver, Boulangerite
Gangue:	Siderite, Quartz, Pyrite, Arsenopyrite, Ankerite
Orebody form:	PINCH AND SWELL
Discovery year:	1885

Production

Operation type:	Underground
Deposit type:	HYDROTHERMAL VEIN AND REPLACEMENT
Production size:	Medium
Development status:	Past Producer
Production years:	1892-1895, 1897-1898, 1919-1922, 1938-1952, 1974, 1976-1991, 1996-1998
First production started:	1892
Last production ended:	1998

Geology

Host rock:	St. Regis Formation, Revett Formation
Host type:	Quartzite
Structure:	Osburn Fault, 1.5 km north of Coeur shaft, N75W 60-80SW, Placer Creek Fault, 3.5 km south of Coeur shaft, Big Creek Anticline, north overturned limb strikes N55W, axial plunge 10 to 20 N, axial plane dips 55SW., Polaris Fault, N55W 50-75SW, cuts north limb of Big Creek anticline, a tension fracture extending from the Osburn to the Placer Creek faults., St. Elmo Fault, N50W 60SW, shows reverse movement., Mineral Point Fault, Fort Wayne Fault, N60W 60-70SW, shows normal displacement., Silver Standard Fault, N60W 65SW, shows normal movement.
Tectonic:	Belt Basin

References

MRDS	W026665
DEP	10107346
Reference	{Deposit:: ENG. MINING JOUR., 1976 , ASARC * NEWLY DEDICATED COEUR SILVER MINE WILL BE FOURTH LARGEST IN US: ENG. MINING JOUR., V. 177 , NO. 7 , P. 23 - 27}{Deposit:: CARTER, R. A., AND LI, TAM., 1976 , IDAH * COEUR *LENE DISTRICT SETS SIGHTS ON RECORD PRODUCTION: MINING ENG., V. 28 , NO. 7 , P. 49 - 64}{Deposit:: Fryklund, V.C., Jr., 1964, Ore deposits of the Coeur *lene district, Shoshone County, Idaho: U.S. Geological Survey Professional Paper 445, 103 p.}{Deposit:: Robinson, Robert Blair, 1980, Structural geology and structural origin of the veins of the Coeur mine, Coeur *lene mining district, Shoshone County, Idaho: Moscow, University of Idaho, MS thesis, 98 p.}{Deposit:: Hackbarth, C.J., and Petersen, U., 1982, Zoning in veins of the Galena and Coeur mines, Coeur *lene mining district, Idaho: Geological Society of America Abstracts with Programs, v. 14, no. 6, p. 314.}{Deposit:: Dahl, Mary Katherine, 1981, Structural and stratigraphic control of ore through the Crescent, Sunshine, Silver Summit, Coeur and Galena mines, Coeur *lene mining district, Idaho: Moscow, Univeristy of Idaho, MS thesis, 97 p.}{Deposit:: Hobbs, S. W., And Others, 1965 , Geology Of The Coeur *lene District, Shoshone County, Idaho: USGS Prof. Paper 478 , 139 P.}
Reporter	Long, Keith R., Kaufmann, Miller, Pat J.