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Free Enterprise Mine (Silver Bell), Boulder, Boulder District, Boulder Batholith, Jefferson Co., Montana, USAi
Regional Level Types
Free Enterprise Mine (Silver Bell)Mine
Boulder- not defined -
Boulder DistrictMining District
Boulder BatholithBatholith
Jefferson Co.County
MontanaState
USACountry

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Latitude & Longitude (WGS84): 46° 15' 20'' North , 112° 8' 55'' West
Latitude & Longitude (decimal): 46.25556,-112.14861
GeoHash:G#: c80ppuxf5
USGS MRDS Record:10196522
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


A former Ag-U-Pb-Cu-Zn-Mo-Ba(baryte)-As-Sb mine located in sec. 19, T6N, R4W, MPM, 3.1 km (1.9 miles) NW of Boulder city and SSE of Sugarloaf Mountain.

The mine is developed by a shaft approximately 130 feet deep, with 2 levels and about 2,000 to 3,000 feet of drifts and crosscuts.

Mine status is currently unknown,and workings were partly caved when visited in May 2006.

Regions containing this locality

North America Plate

Plate - 4,949 mineral species & varietal names listed

Rocky Mountains, North America

Mountain Range - 2,070 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


22 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Albite
Formula: Na(AlSi3O8)
Reference: USGS Bulletin 988-G(1953)
Anorthite
Formula: Ca(Al2Si2O8)
Reference: USGS Bulletin 988-G(1953)
Arsenopyrite
Formula: FeAsS
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Baryte
Formula: BaSO4
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
'Biotite'
Reference: USGS Bulletin 988-G(1953)
Chalcopyrite
Formula: CuFeS2
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Galena
Formula: PbS
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
'Gummite'
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: USGS Bulletin 988-G(1953)
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: USGS Bulletin 988-G(1953)
Magnesio-hornblende
Formula: ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Reference: USGS Bulletin 988-G(1953)
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Molybdenite
Formula: MoS2
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: USGS Bulletin 988-G(1953)
Orthoclase
Formula: K(AlSi3O8)
Reference: USGS Bulletin 988-G(1953)
Pyrargyrite
Formula: Ag3SbS3
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Pyrite
Formula: FeS2
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Quartz
Formula: SiO2
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Samarskite-(Y)
Formula: (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Reference: USGS Bulletin 988-G(1953)
Silver
Formula: Ag
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Uraninite
Formula: UO2
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G
Zeunerite
Formula: Cu(UO2)2(AsO4)2 · 12H2O
Reference: USGS Bulletin 988-G(1953); USGS Bull 988G

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Silver'1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Arsenopyrite'2.EB.20FeAsS
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Molybdenite'2.EA.30MoS2
'Pyrargyrite'2.GA.05Ag3SbS3
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
'Samarskite-(Y)'4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
'Uraninite'4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Baryte'7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
'Autunite'8.EB.05Ca(UO2)2(PO4)2 · 11H2O
'Metatorbernite'8.EB.10Cu(UO2)2(PO4)2 · 8H2O
'Zeunerite'8.EB.05Cu(UO2)2(AsO4)2 · 12H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Anorthite'9.FA.35Ca(Al2Si2O8)
'Kaolinite'9.ED.05Al2(Si2O5)(OH)4
'Magnesio-hornblende'9.DE.10☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Orthoclase'9.FA.30K(AlSi3O8)
'Uranophane'9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Gummite'-
'Limonite'-(Fe,O,OH,H2O)

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
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 3
Pyrargyrite3.4.1.2Ag3SbS3
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Zeunerite40.2a.14.1Cu(UO2)2(AsO4)2 · 12H2O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
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 with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Anorthite-Ca(Al2Si2O8)
'Biotite'-
'Gummite'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
Magnesio-hornblende-☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2

List of minerals for each chemical element

HHydrogen
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
OOxygen
O AlbiteNa(AlSi3O8)
O AnorthiteCa(Al2Si2O8)
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O BaryteBaSO4
O KaoliniteAl2(Si2O5)(OH)4
O Limonite(Fe,O,OH,H2O)
O Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
NaSodium
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AnorthiteCa(Al2Si2O8)
Al KaoliniteAl2(Si2O5)(OH)4
Al Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AnorthiteCa(Al2Si2O8)
Si KaoliniteAl2(Si2O5)(OH)4
Si Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
SSulfur
S AcanthiteAg2S
S ArsenopyriteFeAsS
S BaryteBaSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S MolybdeniteMoS2
S PyrargyriteAg3SbS3
S PyriteFeS2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca AnorthiteCa(Al2Si2O8)
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Ca Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
FeIron
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
CuCopper
Cu ChalcopyriteCuFeS2
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Cu ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
AsArsenic
As ArsenopyriteFeAsS
As ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
YYttrium
Y Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
NbNiobium
Nb Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag AcanthiteAg2S
Ag PyrargyriteAg3SbS3
Ag SilverAg
SbAntimony
Sb PyrargyriteAg3SbS3
BaBarium
Ba BaryteBaSO4
TaTantalum
Ta Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
PbLead
Pb GalenaPbS
ThThorium
Th Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U ZeuneriteCu(UO2)2(AsO4)2 · 12H2O

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: 2113744
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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10103894 & 10196522.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0300430122.
USGS Bulletin 988-G, Geology of the area adjacent to the Free Enterprise mine, Jefferson County, Montana.


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