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Stillwater Complex Chromite deposit (Benbow Mine; Gish Mine; Mouat Mine), Stillwater Co., Montana, USAi
Regional Level Types
Stillwater Complex Chromite deposit (Benbow Mine; Gish Mine; Mouat Mine)Deposit
Stillwater Co.County
MontanaState
USACountry

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Latitude & Longitude (WGS84):
45° 23' 10'' North , 109° 54' 11'' West
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Nearest Settlements:
PlacePopulationDistance
Absarokee1,150 (2011)38.9km
Greycliff112 (2011)42.9km
Reed Point193 (2011)45.6km
Big Timber1,648 (2017)50.0km


A former Cr occurrence/mine located in sec. 20, T5S, R15E.

Deposit is chromite layers hosted in harzburgite rock.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

β“˜ 'Chabazite'
Reference: Rick Dalrymple Collection
β“˜ Chromite
Formula: Fe2+Cr3+2O4
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Enstatite
Formula: Mg2Si2O6
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ 'Fayalite-Forsterite Series'
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Hercynite
Formula: Fe2+Al2O4
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Hercynite var. Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Pentlandite
Formula: (NixFey)Ξ£9S8
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
β“˜ Pyrrhotite
Formula: Fe1-xS
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Pentlandite2.BB.15(NixFey)Ξ£9S8
β“˜Pyrrhotite2.CC.10Fe1-xS
Group 4 - Oxides and Hydroxides
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Hercynite4.BB.05Fe2+Al2O4
β“˜var. Picotite4.BB.05(Fe,Mg)(Al,Cr)2O4
Group 9 - Silicates
β“˜Enstatite9.DA.05Mg2Si2O6
β“˜var. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
Unclassified Minerals, Rocks, etc.
β“˜'Chabazite'-
β“˜'Fayalite-Forsterite Series'-

List of minerals for each chemical element

OOxygen
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ EnstatiteMg2Si2O6
Oβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Oβ“˜ HercyniteFe2+Al2O4
Oβ“˜ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
MgMagnesium
Mgβ“˜ EnstatiteMg2Si2O6
Mgβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Mgβ“˜ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
AlAluminium
Alβ“˜ HercyniteFe2+Al2O4
Alβ“˜ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
SiSilicon
Siβ“˜ EnstatiteMg2Si2O6
Siβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
SSulfur
Sβ“˜ Pentlandite(NixFey)Ξ£9S8
Sβ“˜ PyrrhotiteFe1-xS
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
Crβ“˜ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
FeIron
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Feβ“˜ HercyniteFe2+Al2O4
Feβ“˜ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
Feβ“˜ Pentlandite(NixFey)Ξ£9S8
Feβ“˜ PyrrhotiteFe1-xS
NiNickel
Niβ“˜ Pentlandite(NixFey)Ξ£9S8

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
ALLSMAN, P. T., AND NEWMAN, E. W. (1944), Exploration On The Stillwater Chromite Deposits, Stillwater And Sweetgrass Counties, Montana", AIME
PRICE, P. M. (1963), MINING METHODS & COSTS MOUAT MINE, AMERICAN CHROME CO., STILLWATER COUNTY, MONTANA: U.S. BUREAU OF MINES, IC 8204, 58 P.
Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals: 87(3): 208-240.

Other Databases

Link to USGS MRDS:10124787

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate
USA

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