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Leucite Hills Mining District, Sweetwater County, Wyoming, USAi
Regional Level Types
Leucite Hills Mining DistrictMining District
Sweetwater CountyCounty
WyomingState
USACountry

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PhotosMapsSearch
01773810014972466139877.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01664080014961857656785.jpg
Black Rock

Black Rock, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01012270015782442504495.jpg
Zirkel Mesa, 2012

Zirkel Mesa, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
07656470014961009993046.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
03767360015068781898846.jpg
Black Rock

Black Rock, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
03579030015838025576019.jpg
Zirkel Mesa, 2012

Zirkel Mesa, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01773810014972466139877.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01664080014961857656785.jpg
Black Rock

Black Rock, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
Latitude & Longitude:
41° North , 108° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~131km
GRN:
N28W59
Type:
Mining District
Mindat Locality ID:
7337
Long-form identifier:
mindat:1:2:7337:3
GUID (UUID V4):
f8282500-0765-485b-8bb6-ce65e25ddab3


A series of lamproite occurrences in the area NE of Rock Springs - except for Pilot Butte, which is west of Rock Springs.

Lamproites are ultrapotassic volcanic rocks, forming cinder cones, lava flows, and volcanic necks.

The outcrops consist of hills (the Leucite Hills) due to differential erosion.

Due to the extremely high potassium content of the lamproites, some have been mined for fertilizer (e.g., Zirkel Mesa), and most are still considered mining prospects for potassium.

Lamproites can contain rare minerals enriched in K, Ti (potassic-fluoro-richterite, priderite, noonkanbahite...).

Select Mineral List Type

Standard Detailed Gallery Strunz 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

29 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.

Rock Types Recorded

Note: 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:

β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Localities: Reported from at least 6 localities in this region.
β“˜ Aragonite
Formula: CaCO3
β“˜ Armalcolite
Formula: (Mg,Fe2+)Ti2O5
β“˜ Calcite
Formula: CaCO3
β“˜ Chalcopyrite
Formula: CuFeS2
Description: In olivine orendite. Sulfide globules in silicates.
β“˜ Chromite
Formula: Fe2+Cr3+2O4
β“˜ 'Clinopyroxene Subgroup'
β“˜ Diopside
Formula: CaMgSi2O6
Localities: Reported from at least 11 localities in this region.
β“˜ Enstatite
Formula: Mg2Si2O6
β“˜ 'Fayalite-Forsterite Series'
β“˜ Ferrisanidine
Formula: K[Fe3+Si3O8]
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
β“˜ Forsterite
Formula: Mg2SiO4
β“˜ Forsterite var. Peridot
Formula: Mg2SiO4
β“˜ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜ Leucite
Formula: K(AlSi2O6)
Localities: Reported from at least 12 localities in this region.
β“˜ Magnesiochromite
Formula: MgCr2O4
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
β“˜ Noonkanbahite
Formula: BaKNaTi2(Si4O12)O2
Description: Described originally as scherbakovite, but chemical composition corresponds to the newly redefined noonkanbahite
β“˜ Oxyphlogopite
Formula: K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
β“˜ Pentlandite
Formula: (NixFey)Ξ£9S8
Description: In olivine orendite. Sulfide globules in silicates.
β“˜ Perovskite
Formula: CaTiO3
β“˜ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Localities: Reported from at least 13 localities in this region.
β“˜ Potassic-fluoro-richterite
Formula: {K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Localities: Reported from at least 7 localities in this region.
References:
Gunnar FΓ€rber
β“˜ Potassic-jeanlouisite (TL)
Formula: K(NaCa)(Mg4Ti)Si8O22O2
β“˜ Priderite
Formula: K(Ti4+7Fe3+)O16
Localities: Reported from at least 6 localities in this region.
β“˜ Pyrope
Formula: Mg3Al2(SiO4)3
Description: Gem quality
β“˜ Pyrrhotite
Formula: Fe1-xS
Description: In olivine orendite. Sulfide globules in silicates. Monosulfide solid solution (MSS (Fe,Ni)S, varying between hexagonal (Fe,Ni)9 S10 and monoclinic (Fe,Ni)7 S8).
β“˜ Pyrrhotite var. Nickel-bearing Pyrrhotite
Formula: (Fe,Ni)7S8
Description: In olivine orendite. Sulfide globules in silicates. Monosulfide solid solution (MSS (Fe,Ni)S, varying between hexagonal (Fe,Ni)9 S10 and monoclinic (Fe,Ni)7 S8).
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Chalcedony
Formula: SiO2
β“˜ Richterite
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
β“˜ Rutile
Formula: TiO2
β“˜ Sanidine
Formula: K(AlSi3O8)
Localities: Reported from at least 9 localities in this region.
β“˜ Shcherbakovite
Formula: (K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Description: Initially described as shcherbakovite but chemical composition corresponds to the newly redefined noonkanbahite. See individual localities for more details.
β“˜ Spinel
Formula: MgAl2O4
β“˜ Wadeite
Formula: K2Zr(Si3O9)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Pentlandite2.BB.15(NixFey)Ξ£9S8
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Pyrrhotite
var. Nickel-bearing Pyrrhotite		2.CC.10(Fe,Ni)7S8
β“˜2.CC.10Fe1-xS
Group 4 - Oxides and Hydroxides
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Magnetite
var. Titanium-bearing Magnetite		4.BB.05Fe2+(Fe3+,Ti)2O4
β“˜Spinel4.BB.05MgAl2O4
β“˜Magnesiochromite4.BB.05MgCr2O4
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Armalcolite4.CB.15(Mg,Fe2+)Ti2O5
β“˜Perovskite4.CC.30CaTiO3
β“˜Quartz4.DA.05SiO2
β“˜var. Chalcedony4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
β“˜Priderite4.DK.05bK(Ti4+7Fe3+)O16
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Aragonite5.AB.15CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Forsterite
var. Peridot		9.AC.05Mg2SiO4
β“˜9.AC.05Mg2SiO4
β“˜Pyrope9.AD.25Mg3Al2(SiO4)3
β“˜Wadeite9.CA.10K2Zr(Si3O9)
β“˜Enstatite9.DA.05Mg2Si2O6
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Potassic-fluoro-richterite9.DE.20{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
β“˜Richterite9.DE.20Na(NaCa)Mg5(Si8O22)(OH)2
β“˜Potassic-jeanlouisite (TL)9.DE.25K(NaCa)(Mg4Ti)Si8O22O2
β“˜Shcherbakovite ?9.DH.20(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
β“˜Noonkanbahite9.DH.20BaKNaTi2(Si4O12)O2
β“˜Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
β“˜Oxyphlogopite9.EC.20K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
β“˜Sanidine9.FA.30K(AlSi3O8)
β“˜Ferrisanidine9.FA.30K[Fe3+Si3O8]
β“˜Leucite9.GB.05K(AlSi2O6)
Unclassified
β“˜'Clinopyroxene Subgroup'-
β“˜'Fayalite-Forsterite Series'-
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Hβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Hβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cβ“˜ AragoniteCaCO3
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ AragoniteCaCO3
Oβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Oβ“˜ CalciteCaCO3
Oβ“˜ Quartz var. ChalcedonySiO2
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ EnstatiteMg2Si2O6
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ ForsteriteMg2SiO4
Oβ“˜ LeuciteK(AlSi2O6)
Oβ“˜ MagnesiochromiteMgCr2O4
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ PerovskiteCaTiO3
Oβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Oβ“˜ PrideriteK(Ti74+Fe3+)O16
Oβ“˜ PyropeMg3Al2(SiO4)3
Oβ“˜ QuartzSiO2
Oβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Oβ“˜ RutileTiO2
Oβ“˜ SanidineK(AlSi3O8)
Oβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Oβ“˜ SpinelMgAl2O4
Oβ“˜ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oβ“˜ WadeiteK2Zr(Si3O9)
Oβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Oβ“˜ Forsterite var. PeridotMg2SiO4
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Oβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2
Oβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Oβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Oβ“˜ FerrisanidineK[Fe3+Si3O8]
FFluorine
Fβ“˜ FluorapatiteCa5(PO4)3F
Fβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Fβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Fβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
NaSodium
Naβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Naβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Naβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Naβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2
Naβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
MgMagnesium
Mgβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Mgβ“˜ DiopsideCaMgSi2O6
Mgβ“˜ EnstatiteMg2Si2O6
Mgβ“˜ ForsteriteMg2SiO4
Mgβ“˜ MagnesiochromiteMgCr2O4
Mgβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgβ“˜ PyropeMg3Al2(SiO4)3
Mgβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Mgβ“˜ SpinelMgAl2O4
Mgβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Mgβ“˜ Forsterite var. PeridotMg2SiO4
Mgβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Mgβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
AlAluminium
Alβ“˜ LeuciteK(AlSi2O6)
Alβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Alβ“˜ PyropeMg3Al2(SiO4)3
Alβ“˜ SanidineK(AlSi3O8)
Alβ“˜ SpinelMgAl2O4
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Alβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
SiSilicon
Siβ“˜ Quartz var. ChalcedonySiO2
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ EnstatiteMg2Si2O6
Siβ“˜ ForsteriteMg2SiO4
Siβ“˜ LeuciteK(AlSi2O6)
Siβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Siβ“˜ PyropeMg3Al2(SiO4)3
Siβ“˜ QuartzSiO2
Siβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Siβ“˜ SanidineK(AlSi3O8)
Siβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Siβ“˜ WadeiteK2Zr(Si3O9)
Siβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Siβ“˜ Forsterite var. PeridotMg2SiO4
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2
Siβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Siβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Siβ“˜ FerrisanidineK[Fe3+Si3O8]
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ Pentlandite(NixFey)Ξ£9S8
Sβ“˜ PyrrhotiteFe1-xS
Sβ“˜ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ LeuciteK(AlSi2O6)
Kβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Kβ“˜ PrideriteK(Ti74+Fe3+)O16
Kβ“˜ SanidineK(AlSi3O8)
Kβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Kβ“˜ WadeiteK2Zr(Si3O9)
Kβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Kβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2
Kβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Kβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Kβ“˜ FerrisanidineK[Fe3+Si3O8]
CaCalcium
Caβ“˜ AragoniteCaCO3
Caβ“˜ CalciteCaCO3
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ PerovskiteCaTiO3
Caβ“˜ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Caβ“˜ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Caβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
TiTitanium
Tiβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Tiβ“˜ PerovskiteCaTiO3
Tiβ“˜ PrideriteK(Ti74+Fe3+)O16
Tiβ“˜ RutileTiO2
Tiβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Tiβ“˜ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Tiβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2
Tiβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Tiβ“˜ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
Crβ“˜ MagnesiochromiteMgCr2O4
FeIron
Feβ“˜ Armalcolite(Mg,Fe2+)Ti2O5
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ Pentlandite(NixFey)Ξ£9S8
Feβ“˜ PrideriteK(Ti74+Fe3+)O16
Feβ“˜ PyrrhotiteFe1-xS
Feβ“˜ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Feβ“˜ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
Feβ“˜ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Feβ“˜ FerrisanidineK[Fe3+Si3O8]
NiNickel
Niβ“˜ Pentlandite(NixFey)Ξ£9S8
Niβ“˜ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
ZrZirconium
Zrβ“˜ WadeiteK2Zr(Si3O9)
NbNiobium
Nbβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
BaBarium
Baβ“˜ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Baβ“˜ NoonkanbahiteBaKNaTi2(Si4O12)O2

Localities in this Region

USA
USA

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

(n.d.)
(n.d.)
(n.d.)
Carmichael, Ian S.E. (1967) The mineralogy and petrology of the volcanic rocks from the Leucite Hills, Wyoming. Contributions to Mineralogy and Petrology: 15(1): 24-66.
Kuehner, S.M., Edgar, A.D., Arima, M. (1981) Petrogenesis of the ultrapotassic rocks from the Leucite Hills, Wyoming. American Mineralogist: 66(7-8): 663-677.
Mitchell, Roger H., Bergman, Steven C. (1991) Petrology of Lamproites. Plenum Press, New-York, 447 pages.
Mitchell, Roger H., Chakhmouradian, Anton R. (1999) Sr-bearing perovskite and loparite from lamproite and agpaitic nepheline syenite pegmatites. The Canadian Mineralogist, 37 (1) 99-112
Hausel, W. Dan, Jacobson, Mark (2001) Wyoming Mineral Locality Index. Rocks & Minerals, 76 (6) 380-393 doi:10.1080/00357520109603245
Sharygin, Victor Victorovich, Pospelova, L.N., Smirnov, Sergey, Vladykin, N.V. (2003) Ni-rich sulfide inclusions in early lamproite minerals. Russian Geology and Geophysics: 44(9): 855-866.
Mirnejad, Hassan, Bell, K. (2006) Origin and Source Evolution of the Leucite Hills Lamproites: Evidence from Sr–Nd–Pb–O Isotopic Compositions. Journal of Petrology: 47(12): 2463-2489.
alkcarb.myrocks.info (n.d.) https://alkcarb.myrocks.info/node/1136
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