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Little Horn Mountains, Yuma County, Arizona, USAi
Regional Level Types
Little Horn MountainsMountain Range
Yuma CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
33° 21' 49'' North , 113° 41' 7'' West
Latitude & Longitude (decimal):
33.36361,-113.68528
GeoHash:
G#: 9mzjv18vj
GRN:
N23W68
Type:
Mountain Range
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
33853
Long-form identifier:
mindat:1:2:33853:5
GUID (UUID V4):
0


A Au-Ag-Pb-Mn deposits area.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

17 valid minerals.

Detailed Mineral List:

ⓘ Anglesite
Formula: PbSO4
ⓘ Aragonite
Formula: CaCO3
Description: Part of black-banded calcite veins.
ⓘ Aurorite
Formula: Mn2+Mn4+3O7 · 3H2O
Description: Occurs in black calcite veins.
ⓘ Baryte
Formula: BaSO4
Description: Irregular, vein-like masses in places; crystalline, cutting earlier qartz.
ⓘ Calcite
Formula: CaCO3
Localities: Reported from at least 9 localities in this region.
ⓘ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
ⓘ Cerussite
Formula: PbCO3
ⓘ Chalcophanite
Formula: ZnMn4+3O7 · 3H2O
Habit: Tabular
ⓘ 'Chlorite Group'
Description: Occurs in altered andesite wall rocks.
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Description: Veinlets and blebs.
ⓘ Galena
Formula: PbS
ⓘ Galena var. Silver-bearing Galena
Formula: PbS with Ag
ⓘ Groutite
Formula: Mn3+O(OH)
ⓘ Hematite
Formula: Fe2O3
Description: As fine specks.
ⓘ Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
ⓘ 'K Feldspar'
Description: Occurs in a gold-quartz vein.
ⓘ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
Description: Occurs in a gold-quartz vein.
ⓘ 'Limonite'
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs in altered diorite-porphyry tens of feet from the vein; very fine-grained.
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs in altered andesite wall rocks.
ⓘ Native Gold
Formula: Au
ⓘ 'Psilomelane'
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
Colour: Pinkish-gray
Description: Dense-textured.
ⓘ Rhodochrosite
Formula: MnCO3
Colour: Brown
Description: As veins in black-banded calcite veins.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘGalena2.CD.10PbS
ⓘvar. Silver-bearing Galena2.CD.10PbS with Ag
Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘPyrolusite4.DB.05Mn4+O2
ⓘHollandite4.DK.05aBa(Mn4+6Mn3+2)O16
ⓘGroutite4.FD.10Mn3+O(OH)
ⓘAurorite4.FL.20Mn2+Mn4+3O7 · 3H2O
ⓘChalcophanite4.FL.20ZnMn4+3O7 · 3H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘvar. Manganese-bearing Calcite5.AB.05(Ca,Mn)CO3
ⓘRhodochrosite5.AB.05MnCO3
ⓘAragonite5.AB.15CaCO3
ⓘCerussite5.AB.15PbCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnglesite7.AD.35PbSO4
ⓘBaryte7.AD.35BaSO4
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'K Feldspar
var. Adularia'		-KAlSi3O8
ⓘ'Chlorite Group'-
ⓘ'Limonite'-
ⓘ'Psilomelane'-
ⓘ'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hⓘ AuroriteMn2+Mn34+O7 · 3H2O
Hⓘ ChalcophaniteZnMn34+O7 · 3H2O
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ GroutiteMn3+O(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cⓘ AragoniteCaCO3
Cⓘ CalciteCaCO3
Cⓘ CerussitePbCO3
Cⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ K Feldspar var. AdulariaKAlSi3O8
Oⓘ AnglesitePbSO4
Oⓘ AragoniteCaCO3
Oⓘ AuroriteMn2+Mn34+O7 · 3H2O
Oⓘ BaryteBaSO4
Oⓘ CalciteCaCO3
Oⓘ CerussitePbCO3
Oⓘ ChalcophaniteZnMn34+O7 · 3H2O
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ GroutiteMn3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ HollanditeBa(Mn64+Mn23+)O16
Oⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ RhodochrositeMnCO3
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ K Feldspar var. AdulariaKAlSi3O8
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ K Feldspar var. AdulariaKAlSi3O8
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sⓘ AnglesitePbSO4
Sⓘ BaryteBaSO4
Sⓘ GalenaPbS
Sⓘ Galena var. Silver-bearing GalenaPbS with Ag
KPotassium
Kⓘ K Feldspar var. AdulariaKAlSi3O8
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AragoniteCaCO3
Caⓘ CalciteCaCO3
Caⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
MnManganese
Mnⓘ AuroriteMn2+Mn34+O7 · 3H2O
Mnⓘ ChalcophaniteZnMn34+O7 · 3H2O
Mnⓘ GroutiteMn3+O(OH)
Mnⓘ HollanditeBa(Mn64+Mn23+)O16
Mnⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnⓘ PyrolusiteMn4+O2
Mnⓘ RhodochrositeMnCO3
FeIron
Feⓘ HematiteFe2O3
CuCopper
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ZnZinc
Znⓘ ChalcophaniteZnMn34+O7 · 3H2O
AgSilver
Agⓘ Galena var. Silver-bearing GalenaPbS with Ag
BaBarium
Baⓘ BaryteBaSO4
Baⓘ HollanditeBa(Mn64+Mn23+)O16
AuGold
Auⓘ Native GoldAu
PbLead
Pbⓘ AnglesitePbSO4
Pbⓘ CerussitePbCO3
Pbⓘ GalenaPbS
Pbⓘ Galena var. Silver-bearing GalenaPbS with Ag

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

(1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. University of Arizona Bulletin 134. Arizona Bureau of Minespp.131-132
Demsey, K.A. (1990) Geologic map of Quaternary and upper Tertiary alluvium in the Little Horn Mountains 30' x 60' quadrangle, Arizona: Arizona Geological Survey Open-File Report 90-08, 1 sheet, scale 1:100,000.
Grubensky, M.J., and Demsey, K.A. (1991) Geologic map of the Little Horn Mountains 15' quadrangle, southwestern Arizona [Little Horn Mts. SE, Cementosa Wash, Little Horn Mts. NE, Coyote Peak 7.5 min]: Arizona Geological Survey Map M-29, 10 p., 1 sheet, scale 1:50,000.
Spencer, J.E., comp. (1995) Geologic map of the Little Horn Mountains 30' x 60' quadrangle, southwestern Arizona: Arizona Geological Survey Open-File Report 95-01, 10 p., 1 sheet, scale 1:100,000.
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