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Regal Mine (Keystone Mine), Ruby Mountains Mining District, Beaverhead County, Montana, USAi
Regional Level Types
Regal Mine (Keystone Mine)Mine
Ruby Mountains Mining DistrictMining District
Beaverhead CountyCounty
MontanaState
USACountry

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09382890017272045637045.jpg
Talc

Regal Mine, Ruby Mountains Mining District, Beaverhead County, Montana, USA
09382890017272045637045.jpg
Talc

Regal Mine, Ruby Mountains Mining District, Beaverhead County, Montana, USA
04051160017272041054395.jpg
Talc

Regal Mine, Ruby Mountains Mining District, Beaverhead County, Montana, USA
Latitude & Longitude (WGS84):
45° 10' 23'' North , 112° 25' 37'' West
Latitude & Longitude (decimal):
45.17333,-112.42722
GRN:
N31W57
Type:
Mine
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Dillon4,210 (2017)17.1km
Alder103 (2011)30.1km
Sheridan677 (2017)36.2km
Virginia City199 (2017)40.0km
Twin Bridges394 (2017)41.9km
Mindat Locality ID:
19531
Long-form identifier:
mindat:1:2:19531:0
GUID (UUID V4):
0


A talc mine located 30 miles from Dillon (direction not specified).


Commodities (Major) - Talc-Soapstone
Deposit Type: Replacement
Development Status: Producer
Host Rock Unit: Minas Series,
Structure: Deposit Close To Core Of Tightly Refolded Synform, Many Faults Cut Ore Body
Host Rock: Marble
Tectonic Structure: Area Of Block Faulting

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


5 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ 'Chlorite Group'
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ 'Fayalite-Forsterite Series'
ⓘ Graphite
Formula: C
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Titanite
Formula: CaTiO(SiO4)
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGraphite1.CB.05aC
Group 5 - Nitrates and Carbonates
ⓘDolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ TalcMg3Si4O10(OH)2
BBoron
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
Cⓘ DolomiteCaMg(CO3)2
Cⓘ GraphiteC
OOxygen
Oⓘ DolomiteCaMg(CO3)2
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ Fayalite-Forsterite Series
Oⓘ ApatiteCa5(PO4)3A
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ Fayalite-Forsterite Series
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
KPotassium
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ DolomiteCaMg(CO3)2
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ TitaniteCaTiO(SiO4)
FeIron
Feⓘ Fayalite-Forsterite Series

Other Databases

Link to USGS MRDS:10111253

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Olsdon, Richard H. (1976) The geology of Montana talc deposits, in Eleventh Industrial Minerals Forum. Special Publication 74, Montana Bureau of Mines and Geology. 99-144p.126
U.S. Bureau of Mines, Minerals Today (1990) (January): 28.
Larson, Amy C. (1991) Talc Formation In The Regal-Keystone Mine Of The Ruby Range, Dillon, Montana. 4th Keck Symposium Volume, Keck Geology Consortium. 232-237
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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