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Schwartzwalder Mine (Ralston Creek Mine), Ralston Buttes District, Jefferson Co., Colorado, USAi
Regional Level Types
Schwartzwalder Mine (Ralston Creek Mine)Mine
Ralston Buttes DistrictMining District
Jefferson Co.County
ColoradoState
USACountry

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Latitude & Longitude (WGS84): 39° 50' 41'' North , 105° 16' 50'' West
Latitude & Longitude (decimal): 39.84500,-105.28083
GeoHash:G#: 9xj4sm8cf
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Eldorado Springs585 (2011)9.7km
Coal Creek2,400 (2011)10.7km
Golden20,330 (2017)11.2km
Applewood7,160 (2011)14.0km
West Pleasant View3,840 (2011)15.2km


In the SE 1/4 sec. 25, T. 2 S., R. 71 W. close to Ralston Creek and just west of Ralston Buttes, some 8 mi northwest of Golden.

The Schwartzwalder uranium deposit, in the Front Range west of Denver, Colorado, is the largest vein-type uranium deposit in the United States. The deposit is situated in a steeply dipping fault system that cuts Proterozoic metamorphic rocks. The host rocks represent a submarine volcanic system with associated chert and iron- and sulfide-rich pelitic rocks. Where faulted, the more competent garnetiferous and quartzitic units behaved brittlely and created a deep, narrow conduit.

The ores formed 70-72 m.y. ago beneath 3 km of Phanerozoic sedimentary rocks. Mineralization included two episodes of alteration and three stages of vein-mineralization. Early carbonate-sericite alteration pseudomorphically replaced mafic minerals, whereas the ensuing hematite-adularia episode replaced only the earlier alteration assemblage. Early vein mineralization produced a minor sulfide-adularia-carbonate assemblage. Later vein mineralization generated the uranium ores in two successive stages. Carbonates, sulfides, and adularia filled the remaining voids. Clastic dikes composed of fault gouge and, locally, ore were injected into new and existing fractures. Geologic and chemical evidence suggests that virtually all components of the deposit were derived from major hornblende gneiss units and related rocks. The initial fluids were evolved connate/metamorphic water that infiltrated and resided along the extensive fault zones. Complex fault movements in the frontal zone of the eastern Front Range caused the fluids to migrate to the most permeable segments of the fault zones. The heat was supplied by increased crustal heat flow related to igneous activity in the nearby Colorado mineral belt. Temperatures decreased from 225?C to 125?C during later mineralization, and the pressure episodically dropped from 1000 bars. The CO2 fugacity was initially near 100 bars, and uranium was carried as a dicarbonate complex. Sudden decreases in confining pressure during fault movement caused the evolution of CO2 and a consequent increase in pH. Uranium was released with the destruction of the uranyl complexes; it was subsequently reduced by aqueous sulfur species, thereby leading to the precipitation of pitchblende.

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


46 valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Minerals of Colorado (1997) Eckel, E. B.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Arsenopyrite
Formula: FeAsS
Reference: USGS Open-File Report 83-417
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Bayleyite
Formula: Mg2(UO2)(CO3)3 · 18H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
'Biotite'
Reference: Minerals of Colorado (1997) Eckel, E. B.
Bornite
Formula: Cu5FeS4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Chalcocite
Formula: Cu2S
Reference: Minerals of Colorado (1997) Eckel, E. B.; USGS Open-File Report 83-417
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
'Chlorite Group'
Reference: USGS Open-File Report 83-417
Coffinite
Formula: U(SiO4) · nH2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Covellite
Formula: CuS
Reference: USGS Open-File Report 83-417
Digenite
Formula: Cu9S5
Reference: Minerals of Colorado (1997) Eckel, E. B.
Dolomite
Formula: CaMg(CO3)2
Reference: Minerals of Colorado (1997) Eckel, E. B.; USGS Open-File Report 83-417
Emplectite ?
Formula: CuBiS2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Epsomite
Formula: MgSO4 · 7H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Fluorite
Formula: CaF2
Reference: USGS Open-File Report 83-417
Galena
Formula: PbS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Graphite
Formula: C
Reference: Minerals of Colorado (1997) Eckel, E. B.
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Reference: Minerals of Colorado (1997) Eckel, E. B.
'Gummite'
Reference: Minerals of Colorado (1997) Eckel, E. B.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Hematite
Formula: Fe2O3
Reference: Minerals of Colorado (1997) E.B. Eckel; USGS Open-File Report 83-417
Hexahydrite ?
Formula: MgSO4 · 6H2O
Description: May have formed post collection from epsomite
Reference: Minerals of Colorado (1997) Eckel, E. B.
Johannite
Formula: Cu(UO2)2(SO4)2(OH)2 · 8H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Jordisite
Formula: MoS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
'K Feldspar'
Reference: Minerals of Colorado (1997) Eckel, E. B.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Minerals of Colorado (1997) Eckel, E. B.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Liebigite
Formula: Ca2(UO2)(CO3)3 · 11H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Marcasite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Mixite
Formula: BiCu6(AsO4)3(OH)6 · 3H2O
Reference: Minerals of Colorado (1997) E.B. Eckel
Molybdenite
Formula: MoS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: USGS Open-File Report 83-417
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: USGS Open-File Report 83-417
Nickeline
Formula: NiAs
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417
Phosphuranylite ?
Formula: (H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Reference: Minerals of Colorado (1997) E.B. Eckel
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Pyrrhotite
Formula: Fe7S8
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Quartz var: Amethyst
Formula: SiO2
Reference: Minerals of Colorado (1997) E.B. Eckel; USGS Open-File Report 83-417
Quartz var: Chalcedony
Formula: SiO2
Reference: USGS Open-File Report 83-417
Rammelsbergite
Formula: NiAs2
Reference: Minerals of Colorado (1997) E.B. Eckel; USGS Open-File Report 83-417
Siderite
Formula: FeCO3
Reference: Minerals of Colorado (1997) Eckel, E. B.
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Minerals of Colorado (1997) Eckel, E. B.
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Swartzite
Formula: MgCa(UO2)(CO3)3 · 12H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Sylvanite ?
Formula: (Au,Ag)2Te4
Reference: Minerals of Colorado (1997) E.B. Eckel
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: Minerals of Colorado (1997) E.B. Eckel; USGS Open-File Report 83-417
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Minerals of Colorado (1997) E.B. Eckel
Uraninite
Formula: UO2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Uraninite var: Pitchblende
Formula: UO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open-File Report 83-417; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Woodwardite
Formula: Cu1-xAlx(OH)2(SO4)x/2 · nH2O
Reference: Minerals of Colorado (1997) E.B. Eckel
Zippeite
Formula: K3(UO2)4(SO4)2O3(OH) · 3H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Digenite2.BA.10Cu9S5
Emplectite ?2.HA.05CuBiS2
Galena2.CD.10PbS
Jordisite2.EA.30MoS2
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Nickeline2.CC.05NiAs
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Rammelsbergite2.EB.15aNiAs2
Sphalerite2.CB.05aZnS
Sylvanite ?2.EA.05(Au,Ag)2Te4
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Uraninite4.DL.05UO2
var: Pitchblende4.DL.05UO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Bayleyite5.ED.05Mg2(UO2)(CO3)3 · 18H2O
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Liebigite5.ED.20Ca2(UO2)(CO3)3 · 11H2O
Siderite5.AB.05FeCO3
Swartzite5.ED.10MgCa(UO2)(CO3)3 · 12H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Epsomite7.CB.40MgSO4 · 7H2O
Gypsum7.CD.40CaSO4 · 2H2O
Hexahydrite ?7.CB.25MgSO4 · 6H2O
Johannite7.EB.05Cu(UO2)2(SO4)2(OH)2 · 8H2O
Woodwardite7.DD.35Cu1-xAlx(OH)2(SO4)x/2 · nH2O
Zippeite7.EC.05K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Mixite8.DL.15BiCu6(AsO4)3(OH)6 · 3H2O
Phosphuranylite ?8.EC.10(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Coffinite9.AD.30U(SiO4) · nH2O
Grunerite9.DE.05☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Chlorite Group'-
'Gummite'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Digenite2.4.7.3Cu9S5
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Nickeline2.8.11.1NiAs
Pyrrhotite2.8.10.1Fe7S8
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
Jordisite2.12.11.1MoS2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Rammelsbergite2.12.2.12NiAs2
Sylvanite ?2.12.13.3(Au,Ag)2Te4
Group 3 - SULFOSALTS
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
ø = 2
Emplectite ?3.7.5.2CuBiS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 15 - HYDRATED NORMAL CARBONATES
AmBn(XO3)p·xH2O, with (m+n):p = 1:1
Bayleyite15.3.3.1Mg2(UO2)(CO3)3 · 18H2O
Liebigite15.3.2.1Ca2(UO2)(CO3)3 · 11H2O
Swartzite15.3.3.2MgCa(UO2)(CO3)3 · 12H2O
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Epsomite29.6.11.1MgSO4 · 7H2O
Gypsum29.6.3.1CaSO4 · 2H2O
Hexahydrite ?29.6.8.1MgSO4 · 6H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)6(XO4)Zq·xH2O
Woodwardite31.2.2.1Cu1-xAlx(OH)2(SO4)x/2 · nH2O
(AB)3(XO4)2Zq·xH2O
Johannite31.8.2.1Cu(UO2)2(SO4)2(OH)2 · 8H2O
Miscellaneous
Zippeite31.10.4.1K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Phosphuranylite ?42.4.8.1(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
(AB)7(XO4)3Zq·xH2O
Mixite42.5.1.1BiCu6(AsO4)3(OH)6 · 3H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Coffinite51.5.2.4U(SiO4) · nH2O
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
Unclassified Minerals, Mixtures, etc.
'Biotite'-
'Chlorite Group'-
Grunerite-☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
'Gummite'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
Quartz
var: Amethyst
-SiO2
var: Chalcedony-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
Uraninite
var: Pitchblende
-UO2

List of minerals for each chemical element

HHydrogen
H LiebigiteCa2(UO2)(CO3)3 · 11H2O
H ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
H CoffiniteU(SiO4) · nH2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H BayleyiteMg2(UO2)(CO3)3 · 18H2O
H EpsomiteMgSO4 · 7H2O
H GypsumCaSO4 · 2H2O
H SwartziteMgCa(UO2)(CO3)3 · 12H2O
H JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
H MixiteBiCu6(AsO4)3(OH)6 · 3H2O
H WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2O
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
H HexahydriteMgSO4 · 6H2O
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C LiebigiteCa2(UO2)(CO3)3 · 11H2O
C CalciteCaCO3
C AnkeriteCa(Fe2+,Mg)(CO3)2
C DolomiteCaMg(CO3)2
C BayleyiteMg2(UO2)(CO3)3 · 18H2O
C SwartziteMgCa(UO2)(CO3)3 · 12H2O
C GraphiteC
C SideriteFeCO3
OOxygen
O LiebigiteCa2(UO2)(CO3)3 · 11H2O
O UraniniteUO2
O ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
O CoffiniteU(SiO4) · nH2O
O Uraninite (var: Pitchblende)UO2
O QuartzSiO2
O CalciteCaCO3
O AnkeriteCa(Fe2+,Mg)(CO3)2
O AlmandineFe32+Al2(SiO4)3
O SpessartineMn32+Al2(SiO4)3
O DolomiteCaMg(CO3)2
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O BayleyiteMg2(UO2)(CO3)3 · 18H2O
O EpsomiteMgSO4 · 7H2O
O GypsumCaSO4 · 2H2O
O SwartziteMgCa(UO2)(CO3)3 · 12H2O
O K Feldspar (var: Adularia)KAlSi3O8
O JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
O SideriteFeCO3
O MixiteBiCu6(AsO4)3(OH)6 · 3H2O
O HematiteFe2O3
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Quartz (var: Amethyst)SiO2
O WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2O
O Quartz (var: Chalcedony)SiO2
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
O HexahydriteMgSO4 · 6H2O
FFluorine
F FluoriteCaF2
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
Mg BayleyiteMg2(UO2)(CO3)3 · 18H2O
Mg EpsomiteMgSO4 · 7H2O
Mg SwartziteMgCa(UO2)(CO3)3 · 12H2O
Mg HexahydriteMgSO4 · 6H2O
AlAluminium
Al AlmandineFe32+Al2(SiO4)3
Al SpessartineMn32+Al2(SiO4)3
Al K Feldspar (var: Adularia)KAlSi3O8
Al WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2O
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si CoffiniteU(SiO4) · nH2O
Si QuartzSiO2
Si AlmandineFe32+Al2(SiO4)3
Si SpessartineMn32+Al2(SiO4)3
Si K Feldspar (var: Adularia)KAlSi3O8
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Chalcedony)SiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
SSulfur
S ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
S MolybdeniteMoS2
S ChalcopyriteCuFeS2
S JordisiteMoS2
S GalenaPbS
S BorniteCu5FeS4
S SphaleriteZnS
S PyrrhotiteFe7S8
S PyriteFeS2
S MarcasiteFeS2
S EpsomiteMgSO4 · 7H2O
S GypsumCaSO4 · 2H2O
S ChalcociteCu2S
S JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
S DigeniteCu9S5
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2O
S ArsenopyriteFeAsS
S CovelliteCuS
S EmplectiteCuBiS2
S HexahydriteMgSO4 · 6H2O
KPotassium
K ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
K K Feldspar (var: Adularia)KAlSi3O8
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
CaCalcium
Ca LiebigiteCa2(UO2)(CO3)3 · 11H2O
Ca CalciteCaCO3
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca DolomiteCaMg(CO3)2
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca GypsumCaSO4 · 2H2O
Ca SwartziteMgCa(UO2)(CO3)3 · 12H2O
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca FluoriteCaF2
Ca Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe ChalcopyriteCuFeS2
Fe BorniteCu5FeS4
Fe PyrrhotiteFe7S8
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe PyriteFeS2
Fe MarcasiteFeS2
Fe AlmandineFe32+Al2(SiO4)3
Fe Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Fe SideriteFeCO3
Fe HematiteFe2O3
Fe ArsenopyriteFeAsS
NiNickel
Ni NickelineNiAs
Ni RammelsbergiteNiAs2
CuCopper
Cu ChalcopyriteCuFeS2
Cu BorniteCu5FeS4
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
Cu ChalcociteCu2S
Cu JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
Cu DigeniteCu9S5
Cu MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
Cu WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2O
Cu CovelliteCuS
Cu EmplectiteCuBiS2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As NickelineNiAs
As MixiteBiCu6(AsO4)3(OH)6 · 3H2O
As RammelsbergiteNiAs2
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
As ArsenopyriteFeAsS
MoMolybdenum
Mo MolybdeniteMoS2
Mo JordisiteMoS2
AgSilver
Ag Sylvanite(Au,Ag)2Te4
TeTellurium
Te Sylvanite(Au,Ag)2Te4
AuGold
Au Sylvanite(Au,Ag)2Te4
PbLead
Pb GalenaPbS
BiBismuth
Bi MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Bi EmplectiteCuBiS2
UUranium
U LiebigiteCa2(UO2)(CO3)3 · 11H2O
U UraniniteUO2
U ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
U CoffiniteU(SiO4) · nH2O
U Uraninite (var: Pitchblende)UO2
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U BayleyiteMg2(UO2)(CO3)3 · 18H2O
U SwartziteMgCa(UO2)(CO3)3 · 12H2O
U JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O

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

Triassic
201.3 - 251.902 Ma



ID: 3191821
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 251.902 Ma)

Lithology: Sedimentary 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]

Early Triassic - Pennsylvanian
247.2 - 323.2 Ma



ID: 3001358
Lykins Lyons and Fountain Fms

Age: Phanerozoic (247.2 - 323.2 Ma)

Stratigraphic Name: Lykins Formation; Lyons Sandstone; Fountain Formation

Description: Red siltstone, sandstone, and conglomerate

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{siltstone,sandstone,conglomerate}

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]

Paleoproterozoic
1600 - 2500 Ma



ID: 2442871
Gneiss

Age: Proterozoic (1600 - 2500 Ma)

Description: Composed primarily of gray medium-grained foliated gneiss, consisting mainly of quartz, plagioclase, and biotite, and foliated micaceous schist. Includes large areas of migmatite and migmatitic gneiss near major bodies of Pikes Peak Granite, Silver Plume Quartz Monzonite, and Boulder Creek Granodiorite, as well as garnet, sillimanite, and cordierite-bearing gneisses.

Reference: Trimble, D.E., M.N. Machette. Geologic Map of the Greater Denver Area, Front Range Urban Corridor, Colorado. U.S. Geological Survey Geologic Investigations Series I-856-H. [64]

Paleoproterozoic
1600 - 2500 Ma



ID: 2206736
Hornblende-plagioclase gneiss and amphibolite

Age: Proterozoic (1600 - 2500 Ma)

Description: Dark-gray to black, weakly to strongly foliated, layered, mostly medium grained, hornblende-plagioclase gneiss and amphibolite containing variable amounts of biotite, quartz, and augite. Commonly has black-and-white mottled texture due to weathered plagioclase (white) and hornblende (black). Amphibolite contains greater than 50 percent amphibole. Hornblende-plagioclase gneiss contains interlayered amphibolite, particularly in Nederland 7.5-minute quadrangle, and minor calc-silicate gneiss (Xc) and cordierite-biotite gneiss (Xbc) (Gable, 1969). Commonly intimately interlayered with more felsic gneissic rocks, so many occurrences are included with other units

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

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)
Wallace, Alan R. (1983) Alteration and vein mineralization, Schwartzwalder uranium deposit, Front Range, Colorado. USGS Open-File Report 83-417.
Young, Edward J. (1985) Summary of the geology, economic aspects, and geochemistry of the Schwartzwalder uranium-bearing area, Ralston Buttes district, Jefferson County, Colorado. U.S.Geological Survey Bulletin 1555.
Eckel, Edwin B. (1997) Minerals of Colorado, updated & revised: 19-20.
Caine, J.S., Johnson, R.H., and Wild, E.C. (2011) Review and interpretation of previous work and new data on the hydrogeology of the Schwartzwalder uranium mine and vicinity, Jefferson County, Colorado. U.S. Geological Survey Open-File Report 2011–1092, 55 p.


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