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Speculator Mine, Butte, Butte District (Summit Valley District), Silver Bow Co., Montana, USAi
Regional Level Types
Speculator MineMine
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' 40'' North , 112° 31' 12'' West
Latitude & Longitude (decimal): 46.02778,-112.52000
GeoHash:G#: c2pvze17j
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Walkerville700 (2017)1.4km
Butte34,190 (2011)2.9km
Butte-Silver Bow (Balance)33,525 (2013)17.5km
Warm Springs3,000 (2013)26.6km
Basin212 (2011)33.5km


On June 8, 1917, a mine fire, 2500 feet below ground, caused the death of 168 men, the largest loss of life ever in a US hard-rock mining disaster.

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


8 valid minerals.

Detailed Mineral List:

Bornite
Formula: Cu5FeS4
Chalcopyrite
Formula: CuFeS2
Covellite
Formula: CuS
Enargite
Formula: Cu3AsS4
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Sphalerite
Formula: ZnS
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Enargite2.KA.05Cu3AsS4
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 4
Enargite3.2.1.1Cu3AsS4
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
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 QuartzSiO2
SiSilicon
Si QuartzSiO2
SSulfur
S PyriteFeS2
S BorniteCu5FeS4
S EnargiteCu3AsS4
S ChalcopyriteCuFeS2
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S SphaleriteZnS
S CovelliteCuS
FeIron
Fe PyriteFeS2
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
CuCopper
Cu BorniteCu5FeS4
Cu EnargiteCu3AsS4
Cu ChalcopyriteCuFeS2
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
Cu CovelliteCuS
ZnZinc
Zn SphaleriteZnS
AsArsenic
As EnargiteCu3AsS4
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13

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

Holocene
0 - 0.0117 Ma



ID: 2085655
Tailings, mine dumps, and slag piles

Age: Anthropocene (0 - 0.0117 Ma)

Description: tailings, mine dumps, slag

Lithology: Sand, gravel

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)
Geology and Ore Deposits of the Butte District, Montana; W. Weed 1912; Ore Deposits at Butte, Montana, R. H. Sales, 1914; The Mineralogy of the Butte District, Montana J. M. Guilbert & L. G. Zeihen, 1964


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