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Orphan Girl Mine, Butte, Butte Mining District (Summit Valley Mining District), Silver Bow Co., Montana, USAi
Regional Level Types
Orphan Girl MineMine
Butte- 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° 0' 39'' North , 112° 34' 0'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Butte34,190 (2011)2.6km
Walkerville700 (2017)3.5km
Butte-Silver Bow (Balance)33,525 (2013)14.0km
Warm Springs3,000 (2013)25.3km
Anaconda9,417 (2011)31.8km


This was predominantly a Zinc Mine and is now the home of the World Museum of Mining.

Commodities (Major) - Silver, Lead, Zinc; (Minor) - Manganese; (Trace) - Cadmium
Development Status: Past Producer
Structure: Boulder Batholith
Host Rock: Quartz Monzonite

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


9 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Chalcopyrite
Formula: CuFeS2
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
Galena
Formula: PbS
Reference: Rocks & Min.: 16:244.; 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
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
Pyrite
Formula: FeS2
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
Quartz
Formula: SiO2
Rhodochrosite
Formula: MnCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
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: Rocks & Min.: 16:244.; 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

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pearceite2.GB.15[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Rhodochrosite5.AB.05MnCO3

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
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
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø > 4
Pearceite3.1.8.1[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Rhodochrosite14.1.1.4MnCO3
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

CCarbon
C RhodochrositeMnCO3
OOxygen
O QuartzSiO2
O RhodochrositeMnCO3
SiSilicon
Si QuartzSiO2
SSulfur
S ArsenopyriteFeAsS
S SphaleriteZnS
S GalenaPbS
S ChalcopyriteCuFeS2
S Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
S PyriteFeS2
MnManganese
Mn RhodochrositeMnCO3
FeIron
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
As Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
AgSilver
Ag Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Ag SilverAg
SbAntimony
Sb Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
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)
Rocks & Minerals (xxxx) 16, 244.
Stout, K.S., Ackerman, W.C., Baber, K.D., Kingston, G.A., and Peterson, N.S. (1959) Directory of Known Mining Enterprises. Montana Bureau of Mines and Geology Bulletin 10, 80 p. (p. 65).
Weed, W.H. (1912) Geology and Ore Deposits of the Butte District, Montana. United States Geological Survey Professional Paper 74 (Pl. X).
United States Geological Survey-United States Bureau of Mines Mineral Yearbooks, 1950-1956, 1964.
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].


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