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

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Latitude & Longitude (WGS84): 46° 1' 0'' North , 112° 30' 54'' West
Latitude & Longitude (decimal): 46.01667,-112.51500
GeoHash:G#: c2pvz9j4d
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Butte34,190 (2011)2.1km
Walkerville700 (2017)2.5km
Butte-Silver Bow (Balance)33,525 (2013)16.8km
Warm Springs3,000 (2013)27.7km
Basin212 (2011)34.3km


Ref: Geology and Ore Deposits of the Butte District, Montana; W. Weed 1912; Ore Deposits at Butte, Montana, R. H. Sales, 1914

Consumed by the Berkeley Pit

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


9 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Bornite
Formula: Cu5FeS4
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Chalcocite
Formula: Cu2S
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Enargite
Formula: Cu3AsS4
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Pyrite
Formula: FeS2
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Quartz
Formula: SiO2
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Silver
Formula: Ag
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed
Wulfenite
Formula: Pb(MoO4)
Reference: Geology and Ore Deposits of Butte District, Montana, W. Weed

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Enargite2.KA.05Cu3AsS4
Pyrite2.EB.05aFeS2
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Wulfenite7.GA.05Pb(MoO4)

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 4
Enargite3.2.1.1Cu3AsS4
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O WulfenitePb(MoO4)
O QuartzSiO2
SiSilicon
Si QuartzSiO2
SSulfur
S PyriteFeS2
S EnargiteCu3AsS4
S ChalcociteCu2S
S BorniteCu5FeS4
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S AcanthiteAg2S
FeIron
Fe PyriteFeS2
Fe BorniteCu5FeS4
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
CuCopper
Cu EnargiteCu3AsS4
Cu ChalcociteCu2S
Cu BorniteCu5FeS4
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
ZnZinc
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AsArsenic
As EnargiteCu3AsS4
MoMolybdenum
Mo WulfenitePb(MoO4)
AgSilver
Ag SilverAg
Ag AcanthiteAg2S
SbAntimony
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
PbLead
Pb WulfenitePb(MoO4)

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: 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]

Cretaceous
66 - 145 Ma



ID: 2108663
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]

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


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