Mine detail: Stillwater Complex

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Location:	Stillwater, Sweet Grass County, Montana, United States, North America
Lat / long:	45.41662, -110.00079
dep_id:	60000949
mrds_id:	M045489
Commodity type:	metallic
Major mineral:	Palladium, Chromium, Copper, Platinum, Nickel
Trace mineral:	Silver, Cobalt, Osmium, Gold, Aluminum, Iridium, Rhodium
Operation type:	Unknown
Deposit type:	MAGMATIC SEGREGATIONS AND SULFIDE CRYSTALLIZATION (MERENSKY REEF PGE, STILLWATER NI-CU, BUSHVELD CR)
Production size:	Large ammount of material produced
Development status:	Producer
model:	{1: Stillwater Ni-Cu}{4: Merensky Reef PGE}
conc_proc:	MAGMATIC SEGREGATION BY CRYSTAL SETTLING, LIQUID IMMISCIBILITY, SULFIDE CRYSTALLIZATION
ore_ctrl:	MAGMATIC SEGREGATION BY CRYSTAL SETTLING FOR CHROMITE DEPOSITS, MAGMATIC SEGREGATION BY LIQUID IMMISCIBILITY FOR CU-NI DEPOSITS, MAGMATIC SULFIDE CRYSTALLIZATION FOR JM REEF DEPOSITS
Structure:	CUMULATE LAYERING, NUMEROUS FAULTS OFFSETTING MINERALIZED LAYERS, THE STILLWATER COMPLEX IS EXPOSED ALONG THE NORTHERN MARGIN OF THE BEARTOOTH UPLIFT, ONE OF SEVERAL LARAMIDE BASEMENT-CORED RANGES THAT MAKE UP THE ROCKY MOUNTAIN FORELAND OF SOUTH-CENTRAL MONTANA (FOOSE AND OTHERS, 1961: KULIK AND SCHMIDT, 1988)
dy_ba:	>
disc_yr:	1883
References:	Deposit:: PAGE, N.J, AND NOKLEBERG, W.J., 1974, GEOLOGIC MAP OF THE STILLWATER COMPLEX, MONTANA: US.S GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP 1-797, SCALE 1:12,000. Deposit:: PAGE, N.J, AND DORHENWEND, J.C., 1973, MINERAL RESOURCE POTENTIAL OF THE STILLWATER COMPLEX AND ADJACENT ROCKS IN THE NORTHERN PART OF THE MOUNT WOOD AND MOUNT DOUGLAS QUADRANGLES, SOUTHWESTERN MONTANA: U.S. GEOLOGICAL SURVEY CIRCULAR 684, 9 P. Deposit:: CABRI, L.J., AND LAFLAMME, J.H.G., 1974, RHODIUM, PLATINUM, AND GOLD ALLOYS FROM THE STILLWATER COMPLEX, MONTANA: CANADIAN MINERALOGIST, V.12, P. 399-403. Deposit:: CABRI, L.J., LAFLAMME, J.H.G., STEWART, J.M., AND CHEN, T.T., 1975, NEW DATA ON SOME ARSENIDES AND ANTIMONIDES: CANADIAN MINERALOGIST, V. 13, P. 321-335. Deposit:: PAGE, N.J, RILEY, L.B., AND HAFFTY, JOSEPH, 1969, PLATINUM, PALLADIUM, AND RHODIUM ANALYSES OF ULTRAMAFIC AND MAFIC ROCKS FROM THE STILLWATER COMPLEX, MONTANA: U.S. GEOLOGICAL SURVEY CIRCULAR 624, 12 P. Deposit:: PAGE, N.J, RILEY, L.B., AND HAFFTY, JOSEPH, 1972, VERTICAL AND LATERAL VARIATION OF PLATINUM, PALLADIUM, AND RHODIUM IN THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 67, NO. 7, P. 915-923. Deposit:: PAGE, N.J, ROWE, J.J., AND HAFFTY, JOSEPH, 1976, PLATINUM METALS IN THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 71, NO. 7, P. 1352-1363. Deposit:: ENGINEERING AND MINING JOURNAL, 1975, JOHNS-MANSVILLE FINDS GOOD PLATINUM-PALLADIUM VALUES IN MONTAN* STILLWATER: ENGINEERING AND MINING JOURNAL, V. 176, NO. 2, P. 36. Deposit:: CZAMANSKE, G.K., AND ZIENTEK, M.L., EDS., 1985, THE STILLWATER COMPLEX, MONTANA: GEOLOGY AND GUIDE: MONTANA BUREAU OF MINES AND GEOLOGY SPECIAL PUBLICATION 92, 396 P. Deposit:: PREMO, W.R., HELZ, R.T., ZIENTEK, M.L., AND LANGSTON, R.B., 1990, U-PB AND SM-ND AGES FOR THE STILLWATER COMPLEX AND ITS ASSOCIATED SILLS AND DIKES, BEARTOOTH MOUNTAINS, MONTANA: IDENTIFICATION OF A PARENT MAGMA?: GEOLOGY, V. 18, P. 1065-1068. Deposit:: ZIENTEK, M.L., 1993, MINERAL RESOURCE APPRAISAL FOR LOCATABLE MINERALS: THE STILLWATER COMPLEX, IN HAMMARSTROM, J.M., ZIENTEK, M.L., AND ELLIOTT, J.E., EDS., MINERAL RESOURCE ASSESSMENT OF THE ABSAROKA-BEARTOOTH STUDY AREA, CUSTER AND GALLATIN NATIONAL FORESTS, MONTANA: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 93-207, P. F1-F83.