West Fork West occurrence, Sweet Grass Co., Montana, USAi
| Regional Level Types | |
|---|---|
| West Fork West occurrence | Occurrence |
| Sweet Grass Co. | County |
| Montana | State |
| USA | Country |
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Latitude & Longitude (WGS84):
45° 24' 15'' North , 110° 0' 21'' West
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Greycliff | 112 (2011) | 43.4km |
| Big Timber | 1,648 (2017) | 48.0km |
| Reed Point | 193 (2011) | 49.5km |
Commodities (Major) - PGE - Rhodium, PGE - Palladium, PGE - Platinum; (Minor) - Gold; (Trace) - Nickel, Copper
Development Status: Occurrence
Deposit Model: 4: Merensky Reef PGE
Structure: 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)
Tectonic Structure: Tectonic Setting At Time Of Emplacement Of The Stillwater Complex Is Unknown. The Complex Was E
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
5 valid minerals.
Detailed Mineral List:
| β Chalcopyrite Formula: CuFeS2 Reference: Ohnenstetter, D., Watkinson, D.H., Jones, P.C., Talkington, R.W. (1986) Cryptic compositional variation in laurite and enclosing chromite from the Bird River Sill, Manitoba. Economic Geology: 81(5): 1159-1168. |
| β Chromite Formula: Fe2+Cr3+2O4 Reference: Ohnenstetter, D., Watkinson, D.H., Jones, P.C., Talkington, R.W. (1986) Cryptic compositional variation in laurite and enclosing chromite from the Bird River Sill, Manitoba. Economic Geology: 81(5): 1159-1168. |
| β Laurite Formula: RuS2 Reference: Ohnenstetter, D., Watkinson, D.H., Jones, P.C., Talkington, R.W. (1986) Cryptic compositional variation in laurite and enclosing chromite from the Bird River Sill, Manitoba. Economic Geology: 81(5): 1159-1168. |
| β Pentlandite Formula: (NixFey)Ξ£9S8 Reference: Ohnenstetter, D., Watkinson, D.H., Jones, P.C., Talkington, R.W. (1986) Cryptic compositional variation in laurite and enclosing chromite from the Bird River Sill, Manitoba. Economic Geology: 81(5): 1159-1168. |
| β Sperrylite Formula: PtAs2 Reference: Ohnenstetter, D., Watkinson, D.H., Jones, P.C., Talkington, R.W. (1986) Cryptic compositional variation in laurite and enclosing chromite from the Bird River Sill, Manitoba. Economic Geology: 81(5): 1159-1168. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Laurite | 2.EB.05a | RuS2 |
| β | Pentlandite | 2.BB.15 | (NixFey)Ξ£9S8 |
| β | Sperrylite | 2.EB.05a | PtAs2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Chromite | Fe2+Cr23+O4 |
| S | Sulfur | |
| S | β Laurite | RuS2 |
| S | β Pentlandite | (NixFey)Ξ£9S8 |
| S | β Chalcopyrite | CuFeS2 |
| Cr | Chromium | |
| Cr | β Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | β Chromite | Fe2+Cr23+O4 |
| Fe | β Pentlandite | (NixFey)Ξ£9S8 |
| Fe | β Chalcopyrite | CuFeS2 |
| Ni | Nickel | |
| Ni | β Pentlandite | (NixFey)Ξ£9S8 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| As | Arsenic | |
| As | β Sperrylite | PtAs2 |
| Ru | Ruthenium | |
| Ru | β Laurite | RuS2 |
| Pt | Platinum | |
| Pt | β Sperrylite | PtAs2 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)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.....
Other Databases
| Link to USGS MRDS: | 10093105 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Wyoming DomainDomain
USA
- Absaroka RangeMountain Range
- Montana
- Stillwater ComplexComplex
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