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Hesperus Mine, La Sal Quadrangle, San Juan Co., Utah, USA

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Latitude & Longitude (WGS84): 38° 19' 51'' North , 109° 4' 14'' West
Latitude & Longitude (decimal): 38.33110,-109.07068
GeoHash:G#: 9wf6n1cnu
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


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Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,037 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals.

Detailed Mineral List:

Carnotite
Formula: K2(UO2)2(VO4)2 · 3H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Corvusite
Formula: (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah
Roscoelite
Formula: K(V3+,Al)2(AlSi3O10)(OH)2
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah
Schröckingerite
Formula: NaCa3(UO2)(CO3)3(SO4)F · 10H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah
Tyuyamunite
Formula: Ca(UO2)2(VO4)2 · 5-8H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Uraninite
Formula: UO2
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 4 - Oxides and Hydroxides
'Carnotite'4.HB.05K2(UO2)2(VO4)2 · 3H2O
'Corvusite'4.HE.20(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
'Tyuyamunite'4.HB.25Ca(UO2)2(VO4)2 · 5-8H2O
'Uraninite'4.DL.05UO2
Group 5 - Nitrates and Carbonates
'Schröckingerite'5.EG.05NaCa3(UO2)(CO3)3(SO4)F · 10H2O
Group 9 - Silicates
'Roscoelite'9.EC.15K(V3+,Al)2(AlSi3O10)(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 17 - COMPOUND CARBONATES
Miscellaneous
Schröckingerite17.1.5.1NaCa3(UO2)(CO3)3(SO4)F · 10H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Carnotite40.2a.28.1K2(UO2)2(VO4)2 · 3H2O
Tyuyamunite40.2a.26.1Ca(UO2)2(VO4)2 · 5-8H2O
Group 47 - VANADIUM OXYSALTS
Hydrated Normal Vanadium Oxysalts
Corvusite47.3.2.2(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Roscoelite71.2.2a.4K(V3+,Al)2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H CarnotiteK2(UO2)2(VO4)2 · 3H2O
H Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
H RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
H SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
H TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
CCarbon
C SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
OOxygen
O CarnotiteK2(UO2)2(VO4)2 · 3H2O
O Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
O RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
O SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
O TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
O UraniniteUO2
FFluorine
F SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
NaSodium
Na Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
Na SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
AlAluminium
Al RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
SiSilicon
Si RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
SSulfur
S SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
KPotassium
K CarnotiteK2(UO2)2(VO4)2 · 3H2O
K Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
K RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
CaCalcium
Ca Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
Ca SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
Ca TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
VVanadium
V CarnotiteK2(UO2)2(VO4)2 · 3H2O
V Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
V RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
V TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
FeIron
Fe Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
UUranium
U CarnotiteK2(UO2)2(VO4)2 · 3H2O
U SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2O
U TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
U UraniniteUO2

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

Late Jurassic
145 - 163.5 Ma



ID: 2180642
Brushy Basin Member of Morrison Formation

Age: Jurassic (145 - 163.5 Ma)

Stratigraphic Name: Brushy Basin Member

Description: Variegated siltstone, mudstone, smectitic clay, and lesser amounts of calcareous sandstone and conglomerate, locally with thin lentils of dense limestone; siltstone and mudstone are principally maroon, light purple, grayish red, and light to medium gray; crops out as gentle slopes and steep rounded hills, locally in steep slopes with slight ledges; sandstones range from poorly sorted, conglomeratic, and coarse-grained to well sorted, very fine grained to silty; locally has lenticular conglomeratic sandstone at base with bright-colored chert pebbles and cobbles; lower contact is generally a poorly exposed transition zone of frothy-weathering variegated mudstone and thin light-brown sandstone between the basal conglomeratic sandstone of the Brushy Basin Member and the uppermost sandstone lens of the Salt Wash Member; locally contains petrified dinosaur bone and wood; 76 to150 meters (250-500 ft) thick; Upper Jurassic.

Reference: Doelling, H.H. Geologic map of the La Sal 30'x60'quadrangle, San Juan, Wayne, and Garfield Counties, Utah and Montrose and San Miguel Counties, Colorado. Utah Geological Survey. [31]

Late Jurassic
145 - 163.5 Ma



ID: 2899701
Morrison Formation (Brushy Basin and Salt Wash Members)

Age: Jurassic (145 - 163.5 Ma)

Stratigraphic Name: Brushy Basin Member; Salt Wash Member

Comments: continental environment, braided rivers and streams, overbank mudstones. dinosaur fossils

Lithology: Major:{sandstone mudstone}, Minor:{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]

Early Jurassic - Late Triassic
174.1 - 237 Ma



ID: 3185972
Mesozoic sedimentary rocks

Age: Mesozoic (174.1 - 237 Ma)

Lithology: Sandstone-conglomerate

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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

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