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Chrome Mountain Ni-Cu Occurrence, Sweet Grass County, Montana, USAi
Regional Level Types
Chrome Mountain Ni-Cu OccurrenceOccurrence
Sweet Grass CountyCounty
MontanaState
USACountry

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Latitude & Longitude (WGS84):
45° 26' 2'' North , 110° 7' 18'' West
Latitude & Longitude (decimal):
45.43389,-110.12167
GeoHash:
G#:c81dqngze
GRN:
N31W56
Type:
Occurrence
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Livingston7,302(2017)42.6km
Greycliff112(2011)45.0km
Big Timber1,648(2017)46.4km
Clyde Park309(2017)62.7km
Mindat Locality ID:
160701
Long-form identifier:
mindat:1:2:160701:0
GUID (UUID V4):
0


REF:Deposit:: PAGE, N.J, ROWE, J.J., AND HAFFTY, JOSEPH, 1976, PLATINUM METALS IN THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 71, P. 1352-1363.
Deposit:: PAGE, N.J, AND NOKLEBERG, W.J., 1974, GEOLOGIC MAP OF THE STILLWATER COMPLEX, MONTANA: U.S.
Commodities (Major) - Copper, Nickel; (Minor) - Cobalt, PGE - Platinum, PGE - Rhodium, PGE - Palladium; (Trace) - Silver, Gold, PGE
Development Status: Occurrence
Deposit Model: 1: Stillwater Ni-Cu
Host Rock Unit: Stillwater Complex, Ultramafic Series
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)
Host Rock: Peridotite, Hornfels
Tectonic Structure: Tectonic Setting At Time Of Emplacement Of The Stillwater Complex Is Unknown. The Complex Was E

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Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


4 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical ListTree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
Unclassified
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

OOxygen
OⓘMagnetiteFe2+Fe23+O4
OⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
NaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
AlAluminium
AlⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
SiⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SSulfur
SⓘChalcopyriteCuFeS2
SⓘPentlandite(NixFey)Σ9S8
SⓘPyrrhotiteFe1-xS
CaCalcium
CaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FeIron
FeⓘChalcopyriteCuFeS2
FeⓘMagnetiteFe2+Fe23+O4
FeⓘPentlandite(NixFey)Σ9S8
FeⓘPyrrhotiteFe1-xS
NiNickel
NiⓘPentlandite(NixFey)Σ9S8
CuCopper
CuⓘChalcopyriteCuFeS2

Other Databases

Link to USGS MRDS:10048508

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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