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Beartown Mining District (Bear Creek Mining District), San Juan Co., Colorado, USAi
Regional Level Types
Beartown Mining District (Bear Creek Mining District)Mining District
San Juan Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
37° 43' 22'' North , 107° 30' 9'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


Anaconda; MS 12152; Gold Bug; MS 11691a; Gold Bug Mill Site; MS 11691b; Little Giant; MS 9145; Eclipse; MS 15263; Repeal; MS 11691a; Ferris Heretofore Ptarmigan; MS 8705; Patented Claims: Good Hope; MS 7764; Bonita; MS 11327; Wonder; MS 7764; Scott; MS 1

Commodities (Major) - Gold, Silver; (Minor) - Copper, Lead; (Trace) - Antimony, Tellurium, Zinc
Deposit Type: Vein
Development Status: Past Producer
Deposit Model: 84: Alakaline Au-Te (Au-Ag-Te veins)
Host Rock Unit: Irving Formation, Trimble Granite
Structure: San Juan Uplift, San Juan Volcanic Field, San Juan Uplift, Unnamed Faults, San Juan Caldera, Unnamed Folds
Host Rock: Quartzite, Slate, Gneiss, Schist, Argillite
Tectonic Structure: Central Cordillera (Southern Rocky Mtns)

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 from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

21 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!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
Reference: Minerals of Colorado (1997) Eckels, E. B.
Baryte
Formula: BaSO4
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Bornite
Formula: Cu5FeS4
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Calaverite
Formula: AuTe2
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Calcite
Formula: CaCO3
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcocite
Formula: Cu2S
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Chlorite Group'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Enargite
Formula: Cu3AsS4
Reference: Minerals of Colorado (1997) Eckel, E. B.
Galena
Formula: PbS
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Hematite
Formula: Fe2O3
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Marcasite
Formula: FeS2
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Petzite
Formula: Ag3AuTe2
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Localities: Reported from at least 10 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sylvanite
Formula: (Au,Ag)2Te4
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Tetrahedrite
Formula: Cu6Cu4(Fe2+,Zn)2Sb4S12S
Localities: Reported from at least 9 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Calaverite2.EA.10AuTe2
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Enargite2.KA.05Cu3AsS4
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Petzite2.BA.75Ag3AuTe2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Sylvanite2.EA.05(Au,Ag)2Te4
Tetrahedrite2.GB.05Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite7.BC.10KAl3(SO4)2(OH)6
Baryte7.AD.35BaSO4
Group 9 - Silicates
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Petzite2.4.3.3Ag3AuTe2
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
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
Calaverite2.12.13.2AuTe2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Sylvanite2.12.13.3(Au,Ag)2Te4
Group 3 - SULFOSALTS
ø = 4
Enargite3.2.1.1Cu3AsS4
3 <ø < 4
Tetrahedrite3.3.6.1Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H AluniteKAl3(SO4)2(OH)6
CCarbon
C CalciteCaCO3
C SideriteFeCO3
OOxygen
O HematiteFe2O3
O CalciteCaCO3
O QuartzSiO2
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O MagnetiteFe2+Fe23+O4
O KaoliniteAl2(Si2O5)(OH)4
O Limonite(Fe,O,OH,H2O)
O BaryteBaSO4
O SideriteFeCO3
O AluniteKAl3(SO4)2(OH)6
MgMagnesium
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Al KaoliniteAl2(Si2O5)(OH)4
Al AluniteKAl3(SO4)2(OH)6
SiSilicon
Si QuartzSiO2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si KaoliniteAl2(Si2O5)(OH)4
SSulfur
S TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
S ChalcopyriteCuFeS2
S ChalcociteCu2S
S SphaleriteZnS
S BorniteCu5FeS4
S GalenaPbS
S MarcasiteFeS2
S BaryteBaSO4
S PyriteFeS2
S EnargiteCu3AsS4
S AluniteKAl3(SO4)2(OH)6
KPotassium
K AluniteKAl3(SO4)2(OH)6
CaCalcium
Ca CalciteCaCO3
FeIron
Fe TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Fe ChalcopyriteCuFeS2
Fe BorniteCu5FeS4
Fe MarcasiteFeS2
Fe HematiteFe2O3
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Fe MagnetiteFe2+Fe23+O4
Fe Limonite(Fe,O,OH,H2O)
Fe SideriteFeCO3
Fe PyriteFeS2
CuCopper
Cu TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu BorniteCu5FeS4
Cu EnargiteCu3AsS4
ZnZinc
Zn TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Zn SphaleriteZnS
AsArsenic
As EnargiteCu3AsS4
AgSilver
Ag Sylvanite(Au,Ag)2Te4
Ag PetziteAg3AuTe2
SbAntimony
Sb TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
TeTellurium
Te Sylvanite(Au,Ag)2Te4
Te CalaveriteAuTe2
Te PetziteAg3AuTe2
BaBarium
Ba BaryteBaSO4
AuGold
Au Sylvanite(Au,Ag)2Te4
Au CalaveriteAuTe2
Au PetziteAg3AuTe2
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 67-71, 89-90.
PROSSER, W.C., 1911, THE BEAR CREEK SYLVANITE CAMP, COLORADO: ENG. MINING JOUR., V. 91. 712.

Localities in this Region


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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