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Sheep Tanks Mining District, Little Horn Mts, Yuma Co., Arizona, USAi
Regional Level Types
Sheep Tanks Mining DistrictMining District
Little Horn MtsMountain Range
Yuma Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° North , 113° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~6km
Locality type:
Köppen climate type:


A Au-Ag-Mn-Fe-Cu-Pb-Ba (Be) mining district located in T1N-T1S, R14-15W, within a mile of the southern margin of the Little Horn Mountains. Started in 1909 and owned by J.G. Wetterhall.

Mineralization is varied: (1) Gold and silver with local, minor, lead and copper mineralization in irregular vein deposits along fault zones cutting Tertiary volcanics; (2) Irregular manganese oxides in stringers, pods, and overlapping lenses along shear zones in Tertiary volcanics; and, (3) Minor gold placers.

Workings are numerous prospects, but few producing mines, worked from about 1909 through 1950, producing some 17,411 tons of precious and base metal ores containing about 20,900 oz. of gold, 39,730 oz. of silver and one ton of copper. Some 250 long tons of low-grade manganese ore and a few ounces of placer gold were also produced.

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

17 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 140.
Aragonite
Formula: CaCO3
Aurorite
Formula: (Mn2+,Ag,Ca)Mn4+3O7 · 3H2O
Description: Occurs in black calcite veins.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 124; Cousins, N.B. (1972), Relationship of black calcite to gold and silver mineralization in the Sheep Tanks mining district, Yuma Co., AZ, AZ State Univ. M.S. thesis.
Baryte
Formula: BaSO4
Calcite
Formula: CaCO3
Localities: Reported from at least 9 localities in this region.
Calcite var: Manganoan Calcite
Formula: (Ca,Mn)CO3
Reference: Wilson, E.D., et al (1934), AZ Bur. of Mines Bull. 137: 146; Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 139.
Cerussite
Formula: PbCO3
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 140.
Chalcophanite
Formula: ZnMn4+3O7 · 3H2O
Habit: Tabular
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 164.
'Chlorite Group'
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Description: Veinlets and blebs.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 132-140; Wilson, E.D., et al (1934)(revised 1967), AZ Bur. Mines Bull. 137: 144-145.
Galena
Formula: PbS
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 133, 140.
Galena var: Argentiferous Galena
Formula: PbS
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 133, 140.
Gold
Formula: Au
Groutite
Formula: Mn3+O(OH)
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 240; Cousins, N.B. (1972), Relationship of black calcite to gold and silver mineralization in the Sheep Tanks mining district, Yuma Co., AZ, AZ State Univ. M.S. thesis.
Hematite
Formula: Fe2O3
Description: As fine specks.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 132-140.
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
'K Feldspar'
Description: Occurs in a gold-quartz vein.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 88.
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Description: Occurs in a gold-quartz vein.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 88.
'Limonite'
Formula: (Fe,O,OH,H2O)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
'Psilomelane'
Formula: Mn, O
Pyrolusite
Formula: Mn4+O2
Quartz
Formula: SiO2
Rhodochrosite
Formula: MnCO3
Colour: Brown
Description: As veins in black-banded calcite veins.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 353; Cousins, N.B. (1972), Relationship of black calcite to gold and silver mineralization in the Sheep Tanks mining district, Yuma Co., AZ, AZ State Univ. M.S. thesis.

List of minerals arranged by Strunz 10th Edition classification

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

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Groutite6.1.1.3Mn3+O(OH)
Group 7 - MULTIPLE OXIDES
AB3X7
Aurorite7.8.2.2(Mn2+,Ag,Ca)Mn4+3O7 · 3H2O
Chalcophanite7.8.2.1ZnMn4+3O7 · 3H2O
AB8X16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Rhodochrosite14.1.1.4MnCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Baryte28.3.1.1BaSO4
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Aragonite-CaCO3
Calcite
var: Manganoan Calcite
-(Ca,Mn)CO3
'Chlorite Group'-
Galena
var: Argentiferous Galena
-PbS
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Psilomelane'-Mn, O

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
H ChalcophaniteZnMn34+O7 · 3H2O
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
H GroutiteMn3+O(OH)
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
C AragoniteCaCO3
C CerussitePbCO3
C RhodochrositeMnCO3
C Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
OOxygen
O PyrolusiteMn4+O2
O PsilomelaneMn, O
O CalciteCaCO3
O Limonite(Fe,O,OH,H2O)
O BaryteBaSO4
O ChalcophaniteZnMn34+O7 · 3H2O
O HollanditeBa(Mn64+Mn23+)O16
O AragoniteCaCO3
O QuartzSiO2
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O AnglesitePbSO4
O CerussitePbCO3
O Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
O GroutiteMn3+O(OH)
O K Feldspar (var: Adularia)KAlSi3O8
O HematiteFe2O3
O RhodochrositeMnCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al K Feldspar (var: Adularia)KAlSi3O8
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si QuartzSiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si K Feldspar (var: Adularia)KAlSi3O8
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S BaryteBaSO4
S Galena (var: Argentiferous Galena)PbS
S AnglesitePbSO4
S GalenaPbS
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K K Feldspar (var: Adularia)KAlSi3O8
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca AragoniteCaCO3
Ca Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
Ca Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
MnManganese
Mn PyrolusiteMn4+O2
Mn PsilomelaneMn, O
Mn ChalcophaniteZnMn34+O7 · 3H2O
Mn HollanditeBa(Mn64+Mn23+)O16
Mn Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
Mn GroutiteMn3+O(OH)
Mn RhodochrositeMnCO3
Mn Calcite (var: Manganoan Calcite)(Ca,Mn)CO3
FeIron
Fe Limonite(Fe,O,OH,H2O)
Fe HematiteFe2O3
CuCopper
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
ZnZinc
Zn ChalcophaniteZnMn34+O7 · 3H2O
AgSilver
Ag Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
BaBarium
Ba BaryteBaSO4
Ba HollanditeBa(Mn64+Mn23+)O16
AuGold
Au GoldAu
PbLead
Pb Galena (var: Argentiferous Galena)PbS
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Cousins, N.B. (1972), Relationship of black calcite to gold and silver mineralization in the Sheep Tanks mining district, Yuma County, Arizona, Arizona State University M.S. thesis.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 174 (Table 4).
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 132-133.
Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 143-147.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 118, 124, 240.
Arizona Bureau of Mines file data.

Localities in this Region


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