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Sheep Tanks Mine (Sheep Tank Mine; Resolution group), Kofa Game Range, Sheep Tanks Mining District, Little Horn Mountains, Yuma Co., Arizona, USAi
Regional Level Types
Sheep Tanks Mine (Sheep Tank Mine; Resolution group)Mine
Kofa Game RangeMountain Range
Sheep Tanks Mining DistrictMining District
Little Horn MountainsMountain Range
Yuma Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° 22' 25'' North , 113° 45' 21'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Brenda676 (2011)38.3km
Vicksburg597 (2011)41.2km
Salome1,530 (2011)47.1km


A former surface and underground Au-Ag-Cu-Mn-Ba-Pb (Be) mine located on 12 original claims plus an additional 115 claims, in the NE¼ sec. 1, T1S, R15W (protracted), SW of Salome, which is in La Paz County, on the southern margin of the Little Horn Mountains, on federal land. Started 1926 or 27. Owned by the Sheep Tanks Mines Co.; Anozira Mining Co., later the Sheep Tanks Consolidated Mining Co. (1931- ).

Mineralization in the Sheep Tanks Mines is made up of five major veins, the Resolution vein (which is the main ore body), Lower Tunnel vein, Smyrna vein, Black Eagle vein, and the Lead vein. The Resolution vein dips northward at a low angle and has been stepped down by later faults. It is at least 800 feet (243.8 meters) long north to south by 700 feet (213.36 meters) broad east to west and ranges from a few inches to about 40 feet (12.19 meters) in thickness. Ore control was the fault zone. When the hydrothermal solutions reached the breccia on the Resolution claim, they encountered a flat, dipping fault zone with a relatively impervious cover that caused them to spread outward along the zones of greater permeability. The best oreshoot is near the top of it's western portion. It is a gold and silver vein with local oxidized copper, and spotty, local argentiferous lead mineralization in lensing, irregular masses and streaks with gangue of quartz, pyrolusite, brecciated wall rock, iron oxides and barite in fault and shear veins cutting Tertiary andesitic volcanics intruded by diorite porphyry. The wall rocks are intensely silicified, chloritized, and sericitized.

Workings include shaft, tunnel, and open pit operations. There are several hundreds of feet of adit tunnels at various levels, open stopes and raises to a depth of 74.07 meters. Workings on the Sheep Tanks property include a tunnel some 1450 feet long, that penetrates the ridge south of camp; several hundred feet of branch tunnels and raises from this level; a few hundred feet of workings on levels 170, 183, 200, 237, and 243 feet above the long tunnel; some 225 feet of tunnels on the Black Eagle claim; and many short tunnels and shallow pits. A 100 ton cyanide mill was erected. This mine was discovered in the early 1900's but was not developed until 1926. Sporadic production, from 1929 through 1942, amounted to some 17,400 tons of ore averaging about 1.2 oz. Au/T, 2.3 oz. Ag.T and some copper; yield was 1,303.27 oz. Au, 12,525 oz. Ag and a little copper (to 1929). In 1933, 3 carloads of ore were shipped.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

15 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 140.
Aragonite
Formula: CaCO3
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 164.
Baryte
Formula: BaSO4
Description: Irregular, vein-like masses in places; crystalline, cutting earlier qartz.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 174 (Table 4); Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 132-140.
Calcite
Formula: CaCO3
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'
Description: Occurs in wall rocks.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 132-140.
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
Description: Lode gold; small, thin flakes in iron-stained fractures & vugs within the later, dense, grayish-white quartz.
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.
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)
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.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs in altered diorite-porphyry tens of feet from the vein; very fine-grained.
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.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs in altered diorite-porphyry tens of feet from the vein; very fine-grained.
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.
'Psilomelane'
Formula: Mn, O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 339; Romslo, T.M. & S.F. Ravitz (1947), Arizona manganese-silver ores, US Bur. Mines Rept. Inv. 4097.
Pyrolusite
Formula: Mn4+O2
Description: Vein-like masses in oreshoot near top, western portion of the vein.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 174 (Table 4); 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.
Quartz
Formula: SiO2
Colour: Greenish-yellow, grayish-white
Description: Occurs as brecciated fragments to 2 feet diameter; irregular masses of later dense, grayish-white quartz & as small fissures & vugs in greenish-yellow quartz lined with dense to finely-crystalline, grayish-white quartz.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 132-140.
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
Chalcophanite4.FL.20ZnMn4+3O7 · 3H2O
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
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 7 - MULTIPLE OXIDES
AB3X7
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
'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 ChalcophaniteZnMn34+O7 · 3H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Limonite(Fe,O,OH,H2O)
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C AragoniteCaCO3
C CalciteCaCO3
C CerussitePbCO3
C RhodochrositeMnCO3
OOxygen
O PyrolusiteMn4+O2
O BaryteBaSO4
O ChalcophaniteZnMn34+O7 · 3H2O
O HollanditeBa(Mn64+Mn23+)O16
O AragoniteCaCO3
O CalciteCaCO3
O AnglesitePbSO4
O CerussitePbCO3
O K Feldspar (var: Adularia)KAlSi3O8
O HematiteFe2O3
O QuartzSiO2
O PsilomelaneMn, O
O RhodochrositeMnCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O Limonite(Fe,O,OH,H2O)
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si QuartzSiO2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S BaryteBaSO4
S Galena (var: Argentiferous Galena)PbS
S AnglesitePbSO4
S GalenaPbS
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca AragoniteCaCO3
Ca CalciteCaCO3
MnManganese
Mn PyrolusiteMn4+O2
Mn ChalcophaniteZnMn34+O7 · 3H2O
Mn HollanditeBa(Mn64+Mn23+)O16
Mn PsilomelaneMn, O
Mn RhodochrositeMnCO3
FeIron
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
CuCopper
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
ZnZinc
Zn ChalcophaniteZnMn34+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)
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 132-140.
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: 144-145.
Elsing, M.J. and Heineman, E.S. (1936) Arizona Metal Production, Arizona Bureau of Mines Bulletin 140: 104.
Mills, E.W. (1945) Metallurgical tests of Sheep Tanks ore: Mining Journal: 29(4): 5-6.
Romslo, T.M. & S.F. Ravitz (1947), Arizona manganese-silver ores, US Bureau of Mines Report of Investigation 4097.
Farnham, L.L. & L.A. Stewart (1958), Manganese deposits of western Arizona, US Bureau of Mines Information Circular 7843: 86-87.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 88.
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.
Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355: 82.
Elevatorski, E.A. (1978), Arizona Industrial Minerals, Arizona Department of Mineral Resources, Minerals Report No. 2: 70.
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).
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
Arizona Bureau of Mines file data.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 339, 353.
MRDS database Dep. ID file #10027204, MRDS ID #M002463; and, Dep. ID #10207634, MAS ID #0040270361.

Other Databases

USGS MRDS Record:10027204

Localities in this Region

Other Regions, Features and Areas containing this locality

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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.
 
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