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Dos Cabezas Mining District (Two Heads Mining District), Dos Cabezas Mountains, Cochise County, Arizona, USAi
Regional Level Types
Dos Cabezas Mining District (Two Heads Mining District)Mining District
Dos Cabezas MountainsMountain Range
Cochise CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
32° North , 109° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
GRN:
N22W66
Type:
Mining District
KΓΆppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
31620
Long-form identifier:
mindat:1:2:31620:5
GUID (UUID V4):
8fcd80f3-b3ad-465e-838e-e539aa34528e


A Au-Ag-Cu-Pb-Zn-Be-W mining area located in T14-15S, R27-28E, G&SRM, on the southern flank of the Dos Cabezas (Two Heads) Mountains in central Cochise County, Arizona. Production from the beginning (about 1878) to 1970 totaled some 2,000 tons of Cu, 700 tons Pb, 19 tons Zn, 430,000 ounces Ag and 10,000 ounces Au.

The formations in this district outcrop in westward-trending belts with Pre-Cambrian granite on the South, succeeded northward by steeply dipping, metamorphosed Cretaceous shales and sandstones and Carboniferous limestones. These rocks are intruded by dikes of rhyolite-porphyry and diabase. The thrust fault zone that separates the Cretaceous strata from the granite contains a vein of coarse-grained white quartz, called the "Big Ledge," that attains a maximum width of 100 feet but locally branches and pinches out.

The gold-bearing veins consist of coarse-textured, white to grayish-white quartz with scattered small bunches and disseminations of sulfides. Gold occurs within the sulfides. The veins occur both in the Cretaceous rocks and associated with diabase dikes in the granite. They are of the mesothermal type, but tend to be of lenticular form, particularly in the shales. Their walls show silicification. The shales adjacent to the veins contain pyrite metacrysts and abundant graphite.

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

40 valid minerals.

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“˜ Acanthite
Formula: Ag2S
β“˜ Anglesite
Formula: PbSO4
β“˜ Azurite
Formula: Cu3(CO3)2(OH)2
β“˜ Bismutite
Formula: (BiO)2CO3
Habit: Well-crystallized, paper-thin, tetragonal platelets
Colour: Pearly-white to pale tan
Description: Occurs in gossan; crystals in voids.
β“˜ Bornite
Formula: Cu5FeS4
Localities: Reported from at least 7 localities in this region.
β“˜ Calcite
Formula: CaCO3
β“˜ Cerussite
Formula: PbCO3
β“˜ Chalcanthite
Formula: CuSO4 · 5H2O
β“˜ Chalcocite
Formula: Cu2S
β“˜ Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 26 localities in this region.
β“˜ Chalcopyrite var. Gold-bearing Chalcopyrite
Formula: CuFeS2 with Au
Description: Occurs in bands of coarse-textured quartz.
β“˜ 'Chlorite Group'
Description: Occurs in altered Laramide volcanics.
β“˜ Clinobisvanite
Formula: Bi(VO4)
Habit: Small tablets to 1 mm diameter
Colour: Dull red
Description: Occurs as crystals perched on nontronite partially filling voids in massive white vein quartz.
β“˜ Covellite
Formula: CuS
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Localities: Reported from at least 10 localities in this region.
β“˜ 'Feldspar Group'
β“˜ Galena
Formula: PbS
Localities: Reported from at least 25 localities in this region.
Description: Occurs in bands of coarse-textured quartz.
β“˜ Galena var. Silver-bearing Galena
Formula: PbS with Ag
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
Localities: Reported from at least 6 localities in this region.
β“˜ Gladite
Formula: PbCuBi5S9
Description: Occurs as small beads strung along margins of pekoite prisms, which it appears to be replacing.
β“˜ Goethite
Formula: Ξ±-Fe3+O(OH)
β“˜ Gold
Formula: Au
Localities: Reported from at least 7 localities in this region.
β“˜ Gold var. Electrum
Formula: (Au,Ag)
β“˜ Graphite
Formula: C
Localities: Reported from at least 7 localities in this region.
Description: Abundant in shales adjacent to ore veins.
β“˜ Gypsum
Formula: CaSO4 · 2H2O
β“˜ Hematite
Formula: Fe2O3
Localities: Reported from at least 6 localities in this region.
β“˜ Jarosite
Formula: KFe3+3(SO4)2(OH)6
β“˜ 'Limonite'
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 8 localities in this region.
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 6 localities in this region.
β“˜ Mottramite
Formula: PbCu(VO4)(OH)
β“˜ Mottramite var. Duhamelite
Formula: (Pb,Bi,Ca)Cu(VO4)(OH,O)
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Colour: Brown
Description: Greasy material partially filling voids in massive vein quartz.
β“˜ Opal
Formula: SiO2 · nH2O
β“˜ Pekoite
Formula: PbCuBi11S18
Habit: Prismatic
β“˜ Pyrite
Formula: FeS2
Localities: Reported from at least 35 localities in this region.
β“˜ Pyrite var. Gold-bearing Pyrite
Formula: FeS2
β“˜ Pyrolusite
Formula: Mn4+O2
β“˜ Pyrophyllite
Formula: Al2Si4O10(OH)2
β“˜ Quartz
Formula: SiO2
β“˜ Scheelite
Formula: Ca(WO4)
β“˜ Siderite
Formula: FeCO3
β“˜ Silver
Formula: Ag
β“˜ Sphalerite
Formula: ZnS
Localities: Reported from at least 12 localities in this region.
β“˜ Sternbergite
Formula: AgFe2S3
Habit: Euhedral, up to 2mm long
Description: Occurts on the 150 level enclosed in galena & sphalerite in a silver-rich oreshoot.
β“˜ Talc
Formula: Mg3Si4O10(OH)2
Localities: Reported from at least 6 localities in this region.
β“˜ Topaz
Formula: Al2(SiO4)(F,OH)2
Description: Masses to several hundred pounds in coarse-grained granite.
β“˜ Uytenbogaardtite
Formula: Ag3AuS2
Description: Occurs as small patches to 0.5 mm in galena.
β“˜ 'Wad'

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Silver1.AA.05Ag
β“˜Gold1.AA.05Au
β“˜var. Electrum1.AA.05(Au,Ag)
β“˜Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
β“˜Chalcocite2.BA.05Cu2S
β“˜Bornite2.BA.15Cu5FeS4
β“˜Acanthite2.BA.35Ag2S
β“˜Uytenbogaardtite2.BA.75Ag3AuS2
β“˜Covellite2.CA.05aCuS
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite
var. Gold-bearing Chalcopyrite		2.CB.10aCuFeS2 with Au
β“˜2.CB.10aCuFeS2
β“˜Sternbergite2.CB.65AgFe2S3
β“˜Galena
var. Silver-bearing Galena		2.CD.10PbS with Ag
β“˜2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
β“˜var. Gold-bearing Pyrite2.EB.05aFeS2
β“˜Pekoite2.HB.05aPbCuBi11S18
β“˜Gladite2.HB.05aPbCuBi5S9
Group 4 - Oxides and Hydroxides
β“˜Goethite4.00.Ξ±-Fe3+O(OH)
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
β“˜Opal4.DA.10SiO2 Β· nH2O
β“˜Pyrolusite4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Siderite5.AB.05FeCO3
β“˜Cerussite5.AB.15PbCO3
β“˜Azurite5.BA.05Cu3(CO3)2(OH)2
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
β“˜Bismutite5.BE.25(BiO)2CO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Anglesite7.AD.35PbSO4
β“˜Jarosite7.BC.10KFe3+3(SO4)2(OH)6
β“˜Chalcanthite7.CB.20CuSO4 Β· 5H2O
β“˜Gypsum7.CD.40CaSO4 Β· 2H2O
β“˜Scheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Clinobisvanite8.AD.65Bi(VO4)
β“˜Mottramite8.BH.40PbCu(VO4)(OH)
β“˜var. Duhamelite8.BH.40(Pb,Bi,Ca)Cu(VO4)(OH,O)
Group 9 - Silicates
β“˜Topaz9.AF.35Al2(SiO4)(F,OH)2
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Pyrophyllite9.EC.10Al2Si4O10(OH)2
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 Β· nH2O
Unclassified
β“˜'Limonite'-
β“˜'Wad'-
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Feldspar Group'-
β“˜'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ AzuriteCu3(CO3)2(OH)2
Hβ“˜ ChalcanthiteCuSO4 · 5H2O
Hβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ GoethiteΞ±-Fe3+O(OH)
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ JarositeKFe33+(SO4)2(OH)6
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ MottramitePbCu(VO4)(OH)
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ PyrophylliteAl2Si4O10(OH)2
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ TopazAl2(SiO4)(F,OH)2
CCarbon
Cβ“˜ AzuriteCu3(CO3)2(OH)2
Cβ“˜ Bismutite(BiO)2CO3
Cβ“˜ CalciteCaCO3
Cβ“˜ CerussitePbCO3
Cβ“˜ GraphiteC
Cβ“˜ MalachiteCu2(CO3)(OH)2
Cβ“˜ SideriteFeCO3
OOxygen
Oβ“˜ AnglesitePbSO4
Oβ“˜ AzuriteCu3(CO3)2(OH)2
Oβ“˜ Bismutite(BiO)2CO3
Oβ“˜ CalciteCaCO3
Oβ“˜ CerussitePbCO3
Oβ“˜ ChalcanthiteCuSO4 · 5H2O
Oβ“˜ ClinobisvaniteBi(VO4)
Oβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ GoethiteΞ±-Fe3+O(OH)
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ HematiteFe2O3
Oβ“˜ JarositeKFe33+(SO4)2(OH)6
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ MottramitePbCu(VO4)(OH)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ PyrophylliteAl2Si4O10(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ ScheeliteCa(WO4)
Oβ“˜ SideriteFeCO3
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ TopazAl2(SiO4)(F,OH)2
Oβ“˜ Garnet GroupX3Z2(SiO4)3
FFluorine
Fβ“˜ TopazAl2(SiO4)(F,OH)2
NaSodium
Naβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
MgMagnesium
Mgβ“˜ TalcMg3Si4O10(OH)2
AlAluminium
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Alβ“˜ PyrophylliteAl2Si4O10(OH)2
Alβ“˜ TopazAl2(SiO4)(F,OH)2
SiSilicon
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ PyrophylliteAl2Si4O10(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ TopazAl2(SiO4)(F,OH)2
Siβ“˜ Garnet GroupX3Z2(SiO4)3
SSulfur
Sβ“˜ AcanthiteAg2S
Sβ“˜ AnglesitePbSO4
Sβ“˜ Pyrite var. Gold-bearing PyriteFeS2
Sβ“˜ BorniteCu5FeS4
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ ChalcanthiteCuSO4 · 5H2O
Sβ“˜ ChalcociteCu2S
Sβ“˜ CovelliteCuS
Sβ“˜ GalenaPbS
Sβ“˜ GladitePbCuBi5S9
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ JarositeKFe33+(SO4)2(OH)6
Sβ“˜ PekoitePbCuBi11S18
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
Sβ“˜ SternbergiteAgFe2S3
Sβ“˜ UytenbogaardtiteAg3AuS2
Sβ“˜ Galena var. Silver-bearing GalenaPbS with Ag
Sβ“˜ Chalcopyrite var. Gold-bearing ChalcopyriteCuFeS2 with Au
KPotassium
Kβ“˜ JarositeKFe33+(SO4)2(OH)6
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ CalciteCaCO3
Caβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ ScheeliteCa(WO4)
VVanadium
Vβ“˜ ClinobisvaniteBi(VO4)
Vβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Vβ“˜ MottramitePbCu(VO4)(OH)
MnManganese
Mnβ“˜ PyrolusiteMn4+O2
FeIron
Feβ“˜ Pyrite var. Gold-bearing PyriteFeS2
Feβ“˜ BorniteCu5FeS4
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ GoethiteΞ±-Fe3+O(OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ JarositeKFe33+(SO4)2(OH)6
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Feβ“˜ PyriteFeS2
Feβ“˜ SideriteFeCO3
Feβ“˜ SternbergiteAgFe2S3
Feβ“˜ Chalcopyrite var. Gold-bearing ChalcopyriteCuFeS2 with Au
CuCopper
Cuβ“˜ AzuriteCu3(CO3)2(OH)2
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ ChalcanthiteCuSO4 · 5H2O
Cuβ“˜ ChalcociteCu2S
Cuβ“˜ CovelliteCuS
Cuβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Cuβ“˜ GladitePbCuBi5S9
Cuβ“˜ MalachiteCu2(CO3)(OH)2
Cuβ“˜ MottramitePbCu(VO4)(OH)
Cuβ“˜ PekoitePbCuBi11S18
Cuβ“˜ Chalcopyrite var. Gold-bearing ChalcopyriteCuFeS2 with Au
ZnZinc
Znβ“˜ SphaleriteZnS
AgSilver
Agβ“˜ AcanthiteAg2S
Agβ“˜ Gold var. Electrum(Au,Ag)
Agβ“˜ SilverAg
Agβ“˜ SternbergiteAgFe2S3
Agβ“˜ UytenbogaardtiteAg3AuS2
Agβ“˜ Galena var. Silver-bearing GalenaPbS with Ag
WTungsten
Wβ“˜ ScheeliteCa(WO4)
AuGold
Auβ“˜ Gold var. Electrum(Au,Ag)
Auβ“˜ GoldAu
Auβ“˜ UytenbogaardtiteAg3AuS2
Auβ“˜ Chalcopyrite var. Gold-bearing ChalcopyriteCuFeS2 with Au
PbLead
Pbβ“˜ AnglesitePbSO4
Pbβ“˜ CerussitePbCO3
Pbβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Pbβ“˜ GalenaPbS
Pbβ“˜ GladitePbCuBi5S9
Pbβ“˜ MottramitePbCu(VO4)(OH)
Pbβ“˜ PekoitePbCuBi11S18
Pbβ“˜ Galena var. Silver-bearing GalenaPbS with Ag
BiBismuth
Biβ“˜ Bismutite(BiO)2CO3
Biβ“˜ ClinobisvaniteBi(VO4)
Biβ“˜ Mottramite var. Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)
Biβ“˜ GladitePbCuBi5S9
Biβ“˜ PekoitePbCuBi11S18

Localities in this Region

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Other Regions, Features and Areas containing this locality

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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

The Resources of Arizona - A Manual of Reliable Information Concerning the Territory, compiled by Patrick Hamilton (1881), Prescott, AZ: 40.
Tenney, J.B. (1927-1929) History of Mining in Arizona (unpublished in two volumes), Special Collection, University of Arizona Library & Arizona Bureau of Mines Library: 224-227.
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: 117-121.
Cooper, J.R. (1960) Reconnaissance map of the Willcox, Fisher Hills, Cochise, and Dos Cabezas quadrangles, Cochise and Graham Counties, Arizona: U.S. Geological Survey Mineral Investigations Field Studies Map MF-231, 1 sheet, scale 1:62,500.
Keith, Stanton B. (1973), Arizona Bureau of Geology Bull. 187: 8-9, 60.
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