Stillwater Mine, Stillwater Complex, Nye, Stillwater Co., Montana, USA
|Latitude & Longitude (WGS84):||45° 23' 20'' North , 109° 52' 25'' West|
|Latitude & Longitude (decimal):||45.38895,-109.87365|
|Köppen climate type:||Dfc : Subarctic climate|
PGM ores (mainly of Pd and Pt) are mined from the eastern portion of the J-M Reef. The deposit was discovered in the early 1970s; mining commenced in 1986. During 2003, the Stillwater Mine (owned by the Stillwater Mining Co.) produced approximately 428,000 ounces of palladium and platinum, compared to approximately 492,000 ounces in 2002 and approximately 504,000 ounces in 2001.
62 valid minerals. 5 (TL) - type locality of valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Holocene - Pleistocene|
0 - 2.588 Ma
|Glacial moraine deposits|
Age: Pleistocene (0 - 2.588 Ma)
Description: glacial moraine deposits
Reference: Zientek, M.L., P.D. Derkey, R.J. Miller, J.D. Causet et al. Spatial Databases for the Geology of the Northern Rocky Mountains - Idaho, Montana, and Washington. U.S. Geological Survey Open-File Report 2005-1235 Version 1.0. 
2500 - 4000 Ma
Age: Archean (2500 - 4000 Ma)
Description: Layered ultramafic and mafic rocks from peridotite and pyroxenite at the base (ultramafic series) to gabbro and anorthosite in the upper part (banded series). Maximum exposed thickness in the Beartooth Mountains is about 6,700 m (22,000 ft).
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.