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Cottonwood Wash Area, Blanding, San Juan County, Utah, USAi
Regional Level Types
Cottonwood Wash AreaArea
Blanding- not defined -
San Juan CountyCounty
UtahState
USACountry

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Latitude & Longitude:
37° North , 109° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~159km
GRN:
N26W62
Type:
Area
Mindat Locality ID:
72887
Long-form identifier:
mindat:1:2:72887:1
GUID (UUID V4):
121660b6-720c-419b-bca0-fdea5cde405d


Ref.: Bull. Minéral. , 1987, 110, pp. 145-156.

U-V tabular deposits hosted in the Salt-Wash Member of the Jurassic Morrison Formation (fluviatile sandstones, siltstones and mudstones), east side of the Comb Monocline.
Elogate mineralized clusters (10X10X1 meters) in sandstones along a paleo-channel system.

U originated from the devitrification of volcanic ashes (Brushy Member Basin). U was transported by oxidizing solutions that lost their oxygen by reaction with organic matter (coalification) and Fe2+ minerals, before reaching ore deposition zones.
U and V precipitated in reduced organic-rich zones.
V was probabely released during early diagenetic alteration of Fe-Ti oxide phases by organics and H2S.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Rock Types Recorded

Note: 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:

ⓘ Baryte
Formula: BaSO4
ⓘ Calcite
Formula: CaCO3
Description: Authigenic phase (sandstone cement).
ⓘ 'Chlorite Group'
Description: Vanadium-rich chlorite.
ⓘ Coffinite
Formula: U(SiO4) · nH2O
ⓘ Goethite
Formula: α-Fe3+O(OH)
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
Description: Detrital element in sandstones.
ⓘ Jarosite
Formula: KFe3+3(SO4)2(OH)6
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: Authigenic phase (sandstone cement) : Vermicular books.
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Description: - Detrital element in sandstones (volcanic ashes alteration). - Montmorillonite/illite mixed-layer phase, abundant in mineralized zones.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Detrital element in sandstones.
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Description: Detrital element in sandstones.
ⓘ Pyrite
Formula: FeS2
Description: - Framboidal pyrite I - Automorphic As/Se-rich pyrite II, associated to organic matter
ⓘ Quartz
Formula: SiO2
Description: - Detrital element in sandstones. - Authigenic phase (sandstone cement).
ⓘ Roscoelite
Formula: K(V3+,Al)2(AlSi3O10)(OH)2
ⓘ Rutile
Formula: TiO2
Description: Detrital element in sandstones.
ⓘ Tyuyamunite
Formula: Ca(UO2)2(VO4)2 · 5-8H2O
Description: Associated with iron oxides.
ⓘ Uraninite
Formula: UO2
Description: In cracks of pyrite crystals.
ⓘ Uraninite var. Pitchblende
Formula: UO2
Description: In cracks of pyrite crystals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.α-Fe3+O(OH)
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘUraninite4.DL.05UO2
ⓘvar. Pitchblende4.DL.05UO2
ⓘTyuyamunite4.HB.25Ca(UO2)2(VO4)2 · 5-8H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘJarosite7.BC.10KFe3+3(SO4)2(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘCoffinite9.AD.30U(SiO4) · nH2O
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘRoscoelite9.EC.15K(V3+,Al)2(AlSi3O10)(OH)2
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified
ⓘ'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ CoffiniteU(SiO4) · nH2O
Hⓘ Goethiteα-Fe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ JarositeKFe33+(SO4)2(OH)6
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Hⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ BaryteBaSO4
Oⓘ CalciteCaCO3
Oⓘ CoffiniteU(SiO4) · nH2O
Oⓘ Goethiteα-Fe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ JarositeKFe33+(SO4)2(OH)6
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oⓘ Uraninite var. PitchblendeUO2
Oⓘ QuartzSiO2
Oⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Oⓘ RutileTiO2
Oⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Oⓘ UraniniteUO2
NaSodium
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Alⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
SiSilicon
Siⓘ CoffiniteU(SiO4) · nH2O
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siⓘ QuartzSiO2
Siⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
SSulfur
Sⓘ BaryteBaSO4
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ JarositeKFe33+(SO4)2(OH)6
Sⓘ PyriteFeS2
KPotassium
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ JarositeKFe33+(SO4)2(OH)6
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Caⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
TiTitanium
Tiⓘ RutileTiO2
VVanadium
Vⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Vⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
FeIron
Feⓘ Goethiteα-Fe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ JarositeKFe33+(SO4)2(OH)6
Feⓘ PyriteFeS2
BaBarium
Baⓘ BaryteBaSO4
UUranium
Uⓘ CoffiniteU(SiO4) · nH2O
Uⓘ Uraninite var. PitchblendeUO2
Uⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Uⓘ UraniniteUO2

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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.

References

Utah Geological and Mineral Survey, (1974) Uranium-Vanadium Occurrences of Utah, Open File Report 18.
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