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Lexington Mine, Walkerville, Butte Mining District (Summit Valley Mining District), Silver Bow Co., Montana, USAi
Regional Level Types
Lexington MineMine
Walkerville- not defined -
Butte Mining District (Summit Valley Mining District)Mining District
Silver Bow Co.County
MontanaState
USACountry

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Key
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Latitude & Longitude (WGS84):
46° 1' 41'' North , 112° 32' 3'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Walkerville700 (2017)0.7km
Butte34,190 (2011)2.7km
Butte-Silver Bow (Balance)33,525 (2013)17.0km
Warm Springs3,000 (2013)25.7km
Anaconda9,417 (2011)33.4km


No description has been added for this locality. Can you add one?

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


23 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Calcite
Formula: CaCO3
Reference: Mineralogical Record 33:1
Canfieldite
Formula: Ag8SnS6
Reference: Van King
'Chabazite'
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Chlorite Group'
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Dolomite
Formula: CaMg(CO3)2
Reference: Mineralogical Record 33:1
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Galena
Formula: PbS
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Helvine
Formula: Be3Mn2+4(SiO4)3S
Reference: Rocks & Min.: 16: 244.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Peter Dunn (1976) Genthelvite and the helvine group. Mineralogical Magazine, 40:627-636
'Heulandite subgroup'
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
'Hornblende'
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Marcasite
Formula: FeS2
Reference: Mineralogical Record 33:1
Molybdenite
Formula: MoS2
Reference: From hand sample note on specimen collected by M.H.Gidel, Anaconda Geologist, 1951
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Pearceite
Formula: [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
Pyrargyrite
Formula: Ag3SbS3
Reference: Van King
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
Rhodochrosite
Formula: MnCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
Rhodonite
Formula: Mn2+SiO3
Reference: Rocks & Min.: 16: 244.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Siderite
Formula: FeCO3
Reference: Mineralogical Record 33:1
Silver
Formula: Ag
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website.
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Stilbite subgroup'
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Titanite
Formula: CaTi(SiO4)O
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.
Zircon
Formula: Zr(SiO4)
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Canfieldite2.BA.70Ag8SnS6
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Pearceite2.GB.15[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Pyrargyrite2.GA.05Ag3SbS3
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Rhodochrosite5.AB.05MnCO3
Siderite5.AB.05FeCO3
Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Helvine9.FB.10Be3Mn2+4(SiO4)3S
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Rhodonite9.DK.05Mn2+SiO3
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
'Heulandite subgroup'-
'Hornblende'-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
AmBnXp, with (m+n):p = 3:2
Canfieldite2.5.6.2Ag8SnS6
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø > 4
Pearceite3.1.8.1[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ø = 3
Pyrargyrite3.4.1.2Ag3SbS3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Rhodonite65.4.1.1Mn2+SiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Helvine76.2.4.1Be3Mn2+4(SiO4)3S
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
'Heulandite subgroup'-
'Hornblende'-
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ApatiteCa5(PO4)3(Cl/F/OH)
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
BeBeryllium
Be HelvineBe3Mn42+(SiO4)3S
CCarbon
C RhodochrositeMnCO3
C CalciteCaCO3
C SideriteFeCO3
C DolomiteCaMg(CO3)2
OOxygen
O RhodochrositeMnCO3
O RhodoniteMn2+SiO3
O QuartzSiO2
O HelvineBe3Mn42+(SiO4)3S
O MuscoviteKAl2(AlSi3O10)(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O ZirconZr(SiO4)
O ApatiteCa5(PO4)3(Cl/F/OH)
O TitaniteCaTi(SiO4)O
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O CalciteCaCO3
O SideriteFeCO3
O DolomiteCaMg(CO3)2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg DolomiteCaMg(CO3)2
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
SiSilicon
Si RhodoniteMn2+SiO3
Si QuartzSiO2
Si HelvineBe3Mn42+(SiO4)3S
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si ZirconZr(SiO4)
Si TitaniteCaTi(SiO4)O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S SphaleriteZnS
S PyriteFeS2
S ChalcopyriteCuFeS2
S HelvineBe3Mn42+(SiO4)3S
S GalenaPbS
S AcanthiteAg2S
S MarcasiteFeS2
S PyrargyriteAg3SbS3
S CanfielditeAg8SnS6
S MolybdeniteMoS2
S Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn RhodochrositeMnCO3
Mn RhodoniteMn2+SiO3
Mn HelvineBe3Mn42+(SiO4)3S
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe SideriteFeCO3
Fe MarcasiteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ZnZinc
Zn SphaleriteZnS
AsArsenic
As Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag SilverAg
Ag AcanthiteAg2S
Ag PyrargyriteAg3SbS3
Ag CanfielditeAg8SnS6
Ag Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
SnTin
Sn CanfielditeAg8SnS6
SbAntimony
Sb PyrargyriteAg3SbS3
Sb Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
AuGold
Au GoldAu
PbLead
Pb GalenaPbS

Regional Geology

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

Cretaceous
66 - 145 Ma



ID: 2113917
Biotite-hornblende granodioritic rocks along the Continental Divide, Anaconda Range, Sapphire Mountains, and Flint Creek Range

Age: Cretaceous (66 - 145 Ma)

Lithology: Major:: {biotite-hornblende granodiorite, biotite-hornblende monzogranite, tonalite}

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. [25]

Cretaceous
66 - 145 Ma



ID: 3187684
Mesozoic intrusive rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Cretaceous
66 - 145 Ma



ID: 2984479
Granitic rock

Age: Cretaceous (66 - 145 Ma)

Comments: Original map source: Vuke, S.M., Porter, K.W., Lonn, J.D., and Lopez, D.A., 2007, Geologic Map of Montana - Compact Disc: Montana Bureau of Mines and Geology: Geologic Map 62-C, 73 p., 2 sheets, scale 1:500,000. This map was digitized in 2012 as a result of a contract betwe

Lithology: Major:{granitic}

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. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Gammons, C.H., Szarkowski, J., and Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining Engineering Magazine website [http://me.smenet.org/docs/Publications/ME/Issue/WebExclusiveFinal.pdf].
Rocks & Minerals (xxxx) 16, 244.
Weed, W.H. (1912) Geology and Ore Deposits of the Butte District, Montana. United States Geological Survey Professional Paper 74.
Sales, R.H. (1914) Ore Deposits at Butte, Montana, with discussion. Transactions of the American Institute of Mining Engineers, 46, 3-109.


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