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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
09789360017272025277784.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01416080017272016531151.jpg
Black Rock

Black Rock, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
03044210017272025298501.jpg
Zirkel Mesa, 2012

Zirkel Mesa, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
09789360017272025277784.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
01416080017272016531151.jpg
Black Rock

Black Rock, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
03044210017272025298501.jpg
Zirkel Mesa, 2012

Zirkel Mesa, Leucite Hills Mining District, Sweetwater County, Wyoming, USA
05674190017272025339661.jpg
Some of the Leucite Hills, looking northwest

Leucite Hills Mining District, Sweetwater County, Wyoming, USA
04460250017272016676038.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):
0


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:

ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Localities: Reported from at least 6 localities in this region.
ⓘ Aragonite
Formula: CaCO3
ⓘ Armalcolite
Formula: (Mg,Fe2+)Ti2O5
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
Description: In olivine orendite. Sulfide globules in silicates.
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ 'Clinopyroxene Subgroup'
ⓘ Diopside
Formula: CaMgSi2O6
Localities: Reported from at least 11 localities in this region.
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ 'Fayalite-Forsterite Series'
ⓘ Ferrisanidine
Formula: K[Fe3+Si3O8]
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
ⓘ Forsterite
Formula: Mg2SiO4
ⓘ Forsterite var. Peridot
Formula: Mg2SiO4
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Leucite
Formula: K(AlSi2O6)
Localities: Reported from at least 12 localities in this region.
ⓘ Magnesiochromite
Formula: MgCr2O4
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
ⓘ Noonkanbahite
Formula: BaKNaTi2(Si4O12)O2
Description: Described originally as scherbakovite, but chemical composition corresponds to the newly redefined noonkanbahite
ⓘ Oxyphlogopite
Formula: K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
Description: In olivine orendite. Sulfide globules in silicates.
ⓘ Perovskite
Formula: CaTiO3
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Localities: Reported from at least 13 localities in this region.
ⓘ Potassic-fluoro-richterite
Formula: {K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Localities: Reported from at least 7 localities in this region.
ⓘ Potassic-jeanlouisite (TL)
Formula: K(NaCa)(Mg4Ti)Si8O22O2
ⓘ Priderite
Formula: K(Ti4+7Fe3+)O16
Localities: Reported from at least 6 localities in this region.
ⓘ Pyrope
Formula: Mg3Al2(SiO4)3
Description: Gem quality
ⓘ 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).
ⓘ 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).
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ Richterite
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
ⓘ Rutile
Formula: TiO2
ⓘ Sanidine
Formula: K(AlSi3O8)
Localities: Reported from at least 9 localities in this region.
ⓘ 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.
ⓘ Spinel
Formula: MgAl2O4
ⓘ Wadeite
Formula: K2Zr(Si3O9)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘvar. Nickel-bearing Pyrrhotite2.CC.10(Fe,Ni)7S8
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘMagnesiochromite4.BB.05MgCr2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘMagnetite
var. Titanium-bearing Magnetite		4.BB.05Fe2+(Fe3+,Ti)2O4
ⓘArmalcolite4.CB.15(Mg,Fe2+)Ti2O5
ⓘPerovskite4.CC.30CaTiO3
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘPriderite4.DK.05bK(Ti4+7Fe3+)O16
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAragonite5.AB.15CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
ⓘFluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘvar. Peridot9.AC.05Mg2SiO4
ⓘPyrope9.AD.25Mg3Al2(SiO4)3
ⓘWadeite9.CA.10K2Zr(Si3O9)
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘDiopside9.DA.15CaMgSi2O6
ⓘRichterite9.DE.20Na(NaCa)Mg5(Si8O22)(OH)2
ⓘPotassic-fluoro-richterite9.DE.20{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
ⓘPotassic-jeanlouisite (TL)9.DE.25K(NaCa)(Mg4Ti)Si8O22O2
ⓘShcherbakovite ?9.DH.20(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
ⓘNoonkanbahite9.DH.20BaKNaTi2(Si4O12)O2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘOxyphlogopite9.EC.20K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
ⓘSanidine9.FA.30K(AlSi3O8)
ⓘFerrisanidine9.FA.30K[Fe3+Si3O8]
ⓘLeucite9.GB.05K(AlSi2O6)
Unclassified
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Hⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ AragoniteCaCO3
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AragoniteCaCO3
Oⓘ Armalcolite(Mg,Fe2+)Ti2O5
Oⓘ CalciteCaCO3
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ DiopsideCaMgSi2O6
Oⓘ EnstatiteMg2Si2O6
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ ForsteriteMg2SiO4
Oⓘ LeuciteK(AlSi2O6)
Oⓘ MagnesiochromiteMgCr2O4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ PerovskiteCaTiO3
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PrideriteK(Ti74+Fe3+)O16
Oⓘ PyropeMg3Al2(SiO4)3
Oⓘ QuartzSiO2
Oⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Oⓘ RutileTiO2
Oⓘ SanidineK(AlSi3O8)
Oⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Oⓘ SpinelMgAl2O4
Oⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oⓘ WadeiteK2Zr(Si3O9)
Oⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Oⓘ Forsterite var. PeridotMg2SiO4
Oⓘ Fayalite-Forsterite Series
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2
Oⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Oⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Oⓘ FerrisanidineK[Fe3+Si3O8]
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Fⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
NaSodium
Naⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Naⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Naⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Naⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2
Naⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
MgMagnesium
Mgⓘ Armalcolite(Mg,Fe2+)Ti2O5
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ ForsteriteMg2SiO4
Mgⓘ MagnesiochromiteMgCr2O4
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ PyropeMg3Al2(SiO4)3
Mgⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Mgⓘ SpinelMgAl2O4
Mgⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Mgⓘ Forsterite var. PeridotMg2SiO4
Mgⓘ Fayalite-Forsterite Series
Mgⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Mgⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
AlAluminium
Alⓘ LeuciteK(AlSi2O6)
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ PyropeMg3Al2(SiO4)3
Alⓘ SanidineK(AlSi3O8)
Alⓘ SpinelMgAl2O4
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Alⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
SiSilicon
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ DiopsideCaMgSi2O6
Siⓘ EnstatiteMg2Si2O6
Siⓘ ForsteriteMg2SiO4
Siⓘ LeuciteK(AlSi2O6)
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ PyropeMg3Al2(SiO4)3
Siⓘ QuartzSiO2
Siⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Siⓘ SanidineK(AlSi3O8)
Siⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Siⓘ WadeiteK2Zr(Si3O9)
Siⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Siⓘ Forsterite var. PeridotMg2SiO4
Siⓘ Fayalite-Forsterite Series
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2
Siⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Siⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Siⓘ FerrisanidineK[Fe3+Si3O8]
PPhosphorus
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyrrhotiteFe1-xS
Sⓘ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ LeuciteK(AlSi2O6)
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Kⓘ PrideriteK(Ti74+Fe3+)O16
Kⓘ SanidineK(AlSi3O8)
Kⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Kⓘ WadeiteK2Zr(Si3O9)
Kⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Kⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2
Kⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Kⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
Kⓘ FerrisanidineK[Fe3+Si3O8]
CaCalcium
Caⓘ AragoniteCaCO3
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ PerovskiteCaTiO3
Caⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Caⓘ Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Caⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
TiTitanium
Tiⓘ Armalcolite(Mg,Fe2+)Ti2O5
Tiⓘ PerovskiteCaTiO3
Tiⓘ PrideriteK(Ti74+Fe3+)O16
Tiⓘ RutileTiO2
Tiⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Tiⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Tiⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2
Tiⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Tiⓘ Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ MagnesiochromiteMgCr2O4
FeIron
Feⓘ Armalcolite(Mg,Fe2+)Ti2O5
Feⓘ ChalcopyriteCuFeS2
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ PrideriteK(Ti74+Fe3+)O16
Feⓘ PyrrhotiteFe1-xS
Feⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Feⓘ Fayalite-Forsterite Series
Feⓘ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
Feⓘ OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Feⓘ FerrisanidineK[Fe3+Si3O8]
NiNickel
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ Pyrrhotite var. Nickel-bearing Pyrrhotite(Fe,Ni)7S8
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZrZirconium
Zrⓘ WadeiteK2Zr(Si3O9)
NbNiobium
Nbⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
BaBarium
Baⓘ Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Baⓘ NoonkanbahiteBaKNaTi2(Si4O12)O2

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

www.minsocam.org (n.d.) http://www.minsocam.org/ammin/AM66/AM66_663.pdf
rruff.info (n.d.) https://rruff.info/uploads/CM37_99.pdf
www.researchgate.net (n.d.) https://www.researchgate.net/publication/255712876_Ni-rich_sulfide_inclusions_in_early_lamproite_minerals
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 doi:10.1007/bf01167214
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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