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Twin Buttes Mine, Twin Buttes, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima County, Arizona, USAi
Regional Level Types
Twin Buttes MineMine (Active)
Twin Buttes- not defined -
Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District)Mining District
Sierrita MountainsMountain Range
Pima CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
31° 53' 35'' North , 111° 2' 5'' West
Latitude & Longitude (decimal):
31.89306,-111.03500
GeoHash:
G#: 9t9j3mfy8
GRN:
N22W67
Type:
Mine (Active) - last checked 2018
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Green Valley21,391 (2011)5.8km
Sahuarita25,707 (2017)10.4km
East Sahuarita1,622 (2006)11.5km
Arivaca Junction1,090 (2011)18.6km
Amado295 (2011)20.8km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Old Pueblo Lapidary ClubTucson, Arizona38km
Tucson Gem and Mineral SocietyTucson, Arizona38km
Mindat Locality ID:
3376
Long-form identifier:
mindat:1:2:3376:6
GUID (UUID V4):
5c1b6c99-7aef-41ff-aadb-84927497e62a
Other/historical names associated with this locality:
Twin Buttes Open Pit Mine


A former large surface Cu-Ag-Mo-Zn-Pb-Au-U-Wollastonite mine located in the SW ¼ sec. 5, and the SE¼ sec. 6, T.18S., R.13E. (Twin Buttes 15 minute topo map), 25 miles S of Tucson at Twin Buttes. Previously owned by The Anaconda Co. & Anamax Mining Co. (1975-1985).

Mineralization is dissemination, fracture filling, and bunchy replacements of copper and molybdenum minerals, with minor lead and zinc, oxidized with erratic enrichment in the upper part, in a folded and faulted complex of Paleozoic limestone, silicated limestone, and impure argillaceous limestone; Cretaceous siltstone, arkose, tuffs, and quartzites, and Laramide intrusive quartz monzonite. Ore control was along contacts of dike-like quartz monzonite porphyry with sedimentary rocks. Ore concentration was the secondary enrichment of sulfides. Alteration includes a 200 foot thick ozide zone, skarn, recrystallization, biotitization, and sericitization. Host rock units include the Angelica Arkose and the Concha Limestone. The ore zone depth to top was 121.92 meters and depth to bottom was 243.84 meters.

Total sulfide content generally corresponds to total copper content. The strongest mineralization is found in silicated, garnetized, chloritized limestone & siltstone. The quartzite is only weakly mineralized. Clastics are mineralized on the S, and better Cu values occur in contact with porphyry to the SE. The porphyry shows only scattered and weak mineralization. The sulfide zone is 600-800 feet below the surface. Wollastonite occurs in skarn.

Local structures include sediments folded and contorted, dipping steeply; several fault systems, stratigraphic unconformities.

Workings are an open pit operation at 1,524 meters long, 1,219.2 meters wide and 243.84 meters deep. Planned size was 9,000 X 6,500 feet and 1,000 feet deep. Production from 1965 through 1972 amounted to some 29 million tons of ore averaging about 0.8% Cu, 0.1 oz. Ag/T, and minor Mo, Pb & Au.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


67 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Description: Occurs in skarns & tactites.
ⓘ Andradite
Formula: Ca3Fe3+2(SiO4)3
Description: Zones to 200 feet wide in limestone.
ⓘ Anhydrite
Formula: CaSO4
Description: Hypothermal.
ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Brochantite
Formula: Cu4(SO4)(OH)6
ⓘ Calcite
Formula: CaCO3
Habit: Simply-terminated, rhombic
Colour: Creamy-white (egg shell)
Description: Crusts several inches thick comprised of crystals.
ⓘ Caledonite
Formula: Pb5Cu2(SO4)3(CO3)(OH)6
ⓘ Cerussite
Formula: PbCO3
ⓘ Chalcocite
Formula: Cu2S
Description: Occurs in secondarily enriched ores.
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
Description: Variety penninite.
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Description: Large masses.
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Copper
Formula: Cu
ⓘ Cuprite
Formula: Cu2O
Description: Occurs in oxidized ores.
ⓘ Descloizite
Formula: PbZn(VO4)(OH)
ⓘ Digenite
Formula: Cu9S5
ⓘ Diopside
Formula: CaMgSi2O6
Description: Occurs in skarns.
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Duftite
Formula: PbCu(AsO4)(OH)
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Description: Occurs in tactites and skarns and with laumontite in calcite veinlets.
ⓘ Fluorite
Formula: CaF2
ⓘ Forsterite
Formula: Mg2SiO4
Description: Occurs in garnetite; in skarns or tactites where altered limestones were relatively pure.
ⓘ Galena
Formula: PbS
ⓘ Goethite
Formula: α-Fe3+O(OH)
Description: Abundant in oxidized capping.
ⓘ Grossular
Formula: Ca3Al2(SiO4)3
Description: Occurs in skarns.
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Hematite var. Specularite
Formula: Fe2O3
ⓘ Jarosite
Formula: KFe3+3(SO4)2(OH)6
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: Product of hydrothermal alteration.
ⓘ Kinoite
Formula: Ca2Cu2(H2O)2[Si3O10]
Habit: Micro-crystals; crystals to 0.5 cm.
Description: Occurs as crystals with associated species in wollastonite.
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
ⓘ 'Limonite'
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ 'Manganese Oxides'
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Molybdenite
Formula: MoS2
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Description: A product of hydrothermal alteration.
ⓘ Mottramite
Formula: PbCu(VO4)(OH)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Description: Occurs in the supergene zone in collapse breccias.
ⓘ Palygorskite
Formula: ◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ Plumbojarosite
Formula: Pb0.5Fe3+3(SO4)2(OH)6
ⓘ Powellite
Formula: Ca(MoO4)
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Pyrrhotite
Formula: Fe1-xS
Description: Occurs as a primary mineral.
ⓘ Rhodochrosite
Formula: MnCO3
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Rutile
Formula: TiO2
ⓘ Scheelite
Formula: Ca(WO4)
Description: Occurs in contact zones.
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
Description: Occurs in metamorphic rocks.
ⓘ Siderite
Formula: FeCO3
ⓘ Sphalerite
Formula: ZnS
ⓘ Stibnite
Formula: Sb2S3
ⓘ Stringhamite
Formula: CaCu(SiO4) · H2O
Description: Occurs with associated species in wollastonite.
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Tenorite
Formula: CuO
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Titanite
Formula: CaTi(SiO4)O
ⓘ Topaz
Formula: Al2(SiO4)(F,OH)2
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
Description: Occurs in tactites and skarns.
ⓘ Turquoise
Formula: CuAl6(PO4)4(OH)8 · 4H2O
ⓘ Vanadinite
Formula: Pb5(VO4)3Cl
ⓘ Vesuvianite
Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Description: Occurs in skarns & tactites.
ⓘ Wollastonite
Formula: Ca3(Si3O9)
Description: Occurs in skarns & tactites.
ⓘ Wulfenite
Formula: Pb(MoO4)

Gallery:

Cuⓘ Copper
Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2Oⓘ Nontronite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘCopper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘDigenite2.BA.10Cu9S5
ⓘBornite2.BA.15Cu5FeS4
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘStibnite2.DB.05Sb2S3
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.α-Fe3+O(OH)
ⓘCuprite4.AA.10Cu2O
ⓘTenorite4.AB.10CuO
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite
var. Specularite		4.CB.05Fe2O3
ⓘ4.CB.05Fe2O3
ⓘRutile4.DB.05TiO2
ⓘPyrolusite4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘRhodochrosite5.AB.05MnCO3
ⓘSiderite5.AB.05FeCO3
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘCerussite5.AB.15PbCO3
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnhydrite7.AD.30CaSO4
ⓘBrochantite7.BB.25Cu4(SO4)(OH)6
ⓘJarosite7.BC.10KFe3+3(SO4)2(OH)6
ⓘPlumbojarosite7.BC.10Pb0.5Fe3+3(SO4)2(OH)6
ⓘCaledonite7.BC.50Pb5Cu2(SO4)3(CO3)(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘScheelite7.GA.05Ca(WO4)
ⓘWulfenite7.GA.05Pb(MoO4)
ⓘPowellite7.GA.05Ca(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘDuftite8.BH.35PbCu(AsO4)(OH)
ⓘMottramite8.BH.40PbCu(VO4)(OH)
ⓘDescloizite8.BH.40PbZn(VO4)(OH)
ⓘVanadinite8.BN.05Pb5(VO4)3Cl
ⓘTurquoise8.DD.15CuAl6(PO4)4(OH)8 · 4H2O
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘGrossular9.AD.25Ca3Al2(SiO4)3
ⓘAndradite9.AD.25Ca3Fe3+2(SiO4)3
ⓘStringhamite9.AE.35CaCu(SiO4) · H2O
ⓘTopaz9.AF.35Al2(SiO4)(F,OH)2
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘVesuvianite9.BG.35Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
ⓘKinoite9.BH.10Ca2Cu2(H2O)2[Si3O10]
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘDiopside9.DA.15CaMgSi2O6
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘWollastonite9.DG.05Ca3(Si3O9)
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite
var. Sericite		9.EC.15KAl2(AlSi3O10)(OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘNontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘPalygorskite9.EE.20◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
Unclassified
ⓘ'Limonite'-
ⓘ'Chlorite Group'-
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Apophyllite Group'-AB4[Si8O22]X · 8H2O
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Manganese Oxides'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ BrochantiteCu4(SO4)(OH)6
Hⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ DescloizitePbZn(VO4)(OH)
Hⓘ DuftitePbCu(AsO4)(OH)
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ Goethiteα-Fe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ JarositeKFe33+(SO4)2(OH)6
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ KinoiteCa2Cu2(H2O)2[Si3O10]
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MottramitePbCu(VO4)(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Hⓘ Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ StringhamiteCaCu(SiO4) · H2O
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ TopazAl2(SiO4)(F,OH)2
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Hⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Cⓘ CerussitePbCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ RhodochrositeMnCO3
Cⓘ SideriteFeCO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AndraditeCa3Fe23+(SiO4)3
Oⓘ AnhydriteCaSO4
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BrochantiteCu4(SO4)(OH)6
Oⓘ CalciteCaCO3
Oⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Oⓘ CerussitePbCO3
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ CupriteCu2O
Oⓘ DescloizitePbZn(VO4)(OH)
Oⓘ DiopsideCaMgSi2O6
Oⓘ DolomiteCaMg(CO3)2
Oⓘ DuftitePbCu(AsO4)(OH)
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ ForsteriteMg2SiO4
Oⓘ Goethiteα-Fe3+O(OH)
Oⓘ GrossularCa3Al2(SiO4)3
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ JarositeKFe33+(SO4)2(OH)6
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ KinoiteCa2Cu2(H2O)2[Si3O10]
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MottramitePbCu(VO4)(OH)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Oⓘ Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Oⓘ PowelliteCa(MoO4)
Oⓘ PyrolusiteMn4+O2
Oⓘ RhodochrositeMnCO3
Oⓘ RhodoniteCaMn3Mn[Si5O15]
Oⓘ RutileTiO2
Oⓘ ScheeliteCa(WO4)
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SideriteFeCO3
Oⓘ StringhamiteCaCu(SiO4) · H2O
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TenoriteCuO
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ TopazAl2(SiO4)(F,OH)2
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Oⓘ VanadinitePb5(VO4)3Cl
Oⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Oⓘ WulfenitePb(MoO4)
Oⓘ WollastoniteCa3(Si3O9)
Oⓘ Hematite var. SpeculariteFe2O3
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ FluoriteCaF2
Fⓘ TopazAl2(SiO4)(F,OH)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Naⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ ForsteriteMg2SiO4
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Mgⓘ Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ GrossularCa3Al2(SiO4)3
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Alⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Alⓘ Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ TopazAl2(SiO4)(F,OH)2
Alⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Alⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AndraditeCa3Fe23+(SiO4)3
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ DiopsideCaMgSi2O6
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ ForsteriteMg2SiO4
Siⓘ GrossularCa3Al2(SiO4)3
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ KinoiteCa2Cu2(H2O)2[Si3O10]
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Siⓘ Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ StringhamiteCaCu(SiO4) · H2O
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ TopazAl2(SiO4)(F,OH)2
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Siⓘ WollastoniteCa3(Si3O9)
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
Pⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ AnhydriteCaSO4
Sⓘ BorniteCu5FeS4
Sⓘ BrochantiteCu4(SO4)(OH)6
Sⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ DigeniteCu9S5
Sⓘ GalenaPbS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ JarositeKFe33+(SO4)2(OH)6
Sⓘ MolybdeniteMoS2
Sⓘ PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ StibniteSb2S3
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ClChlorine
Clⓘ VanadinitePb5(VO4)3Cl
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ JarositeKFe33+(SO4)2(OH)6
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ AndraditeCa3Fe23+(SiO4)3
Caⓘ AnhydriteCaSO4
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ FluoriteCaF2
Caⓘ GrossularCa3Al2(SiO4)3
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ KinoiteCa2Cu2(H2O)2[Si3O10]
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Caⓘ PowelliteCa(MoO4)
Caⓘ RhodoniteCaMn3Mn[Si5O15]
Caⓘ ScheeliteCa(WO4)
Caⓘ StringhamiteCaCu(SiO4) · H2O
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Caⓘ WollastoniteCa3(Si3O9)
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ RutileTiO2
Tiⓘ TitaniteCaTi(SiO4)O
VVanadium
Vⓘ DescloizitePbZn(VO4)(OH)
Vⓘ MottramitePbCu(VO4)(OH)
Vⓘ VanadinitePb5(VO4)3Cl
MnManganese
Mnⓘ PyrolusiteMn4+O2
Mnⓘ RhodochrositeMnCO3
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ AndraditeCa3Fe23+(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ Goethiteα-Fe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ JarositeKFe33+(SO4)2(OH)6
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Feⓘ PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ SideriteFeCO3
Feⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Feⓘ Hematite var. SpeculariteFe2O3
CuCopper
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ BorniteCu5FeS4
Cuⓘ BrochantiteCu4(SO4)(OH)6
Cuⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ CupriteCu2O
Cuⓘ CopperCu
Cuⓘ DigeniteCu9S5
Cuⓘ DuftitePbCu(AsO4)(OH)
Cuⓘ KinoiteCa2Cu2(H2O)2[Si3O10]
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ MottramitePbCu(VO4)(OH)
Cuⓘ StringhamiteCaCu(SiO4) · H2O
Cuⓘ TenoriteCuO
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Cuⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
ZnZinc
Znⓘ DescloizitePbZn(VO4)(OH)
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ DuftitePbCu(AsO4)(OH)
MoMolybdenum
Moⓘ MolybdeniteMoS2
Moⓘ PowelliteCa(MoO4)
Moⓘ WulfenitePb(MoO4)
SbAntimony
Sbⓘ StibniteSb2S3
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
WTungsten
Wⓘ ScheeliteCa(WO4)
PbLead
Pbⓘ CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Pbⓘ CerussitePbCO3
Pbⓘ DescloizitePbZn(VO4)(OH)
Pbⓘ DuftitePbCu(AsO4)(OH)
Pbⓘ GalenaPbS
Pbⓘ MottramitePbCu(VO4)(OH)
Pbⓘ PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Pbⓘ VanadinitePb5(VO4)3Cl
Pbⓘ WulfenitePb(MoO4)

Other Databases

Link to USGS MRDS:10103756
Link to USGS MRDS:10234825

Other Regions, Features and Areas containing this locality

Mexico
North America
North America PlateTectonic Plate

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References

Skillings Mining Review, Vol. 59(36).
October 29: 8.
USGS MRDS ID #M050530.
Galbraith, F. W. (1947) Minerals of Arizona (Second Edition, Revised) University of Arizona Bulletin 153. Arizona Bureau of Mines
Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 94.
Engineering and Mining Journal (1967), Stripping at Twin Buttes: 168(4) (April, 1967): 91-99.
Skillings, D.N. (1967), Anaconda Prepares Site for Its New Twin Buttes Copper Concentrator. Skillings' Mining Review: 56(24) (June 17, 1967): 1, 21.
Kalt, W. D., Jr. (1968), Awake the Copper Ghosts; The History of Banner Mining Company and the Treasure of Twin Buttes. Banner Mining Company, 99 pages.
Skillings, D. N., Jr. (1969), Twin Buttes Copper Project of Anaconda Company in Arizona. Skillings' Mining Review: 58(6) (February 8, 1969): 1, 4-5, 8.
Caldwell, A. B. (1970), Twin Buttes--Anaconda 's Concept for Mining and Processing a Low-Grade Copper Ore. Mining Engineering: 22(4) (April, 1970): 51-66.
Engineering and Mining Journal (1970), Twin Buttes Solves the Problems of Great Depth, Low Grade, Complex Orebody: 171(8) (August, 1970): 74-78.
Knaebel, J. B. (1970), Development of the Twin Buttes Mine. Presentation to Society of Mining Engineers, AIME, Denver, Colorado, February 15-19, 1970, AIME Preprint 70-AO-58, 63 pages.
Mining Magazine (1970), Twin Buttes; Pre-Production Stripping with Belt Conveyors: 123(3) (September, 1970): 182-183, 185-186, 189.
Pay Dirt (1970), Anaconda's Twin Buttes Mine in Full Production. No. 370 (April 27, 1970): 4-10, 20, 22, 24, 26, 28, 30.
Paydirt (1970), May 27, 1970.
Skillings, D. N., Jr. (1970), Twin Buttes Project. Skillings' Mining Review: 59(36) (September 5, 1970): 1, 4, 5, 12-16.
World Mining (1971 & 1972).
Paydirt (1972), Aug 28, 1972.
Pay Dirt (1973), AMAX, Anaconda Set Twin Buttes Expansion as Banner Deal is Completed: No. 408, June 25: 7.
Pay Dirt (1973), Construction Under Way at Twin Buttes Leach Plant: No. 412,
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 138 (Table 4).
Sutulov, Alexander (1974) Copper Porphyries, University of Utah Printing Services (mill).
Burgin, L.B. (1976) Time Required in Developing Selected Arizona Copper Mines, U.S. Bureau of Mines Information Circular IC 8702.
Kelly, J.L. (1976) Geology of the Twin Buttes copper deposit, Pima County, Arizona [abs.]: Economic Geology: 71(3): 701.
Lorraine (1976) U.S. Bureau of Mines Information Circular 8702.
World Mining (1976): 11/76: 77.
Brooke, James N. (1977) Uranium Recovery from Copper Leaching Operations. Mining Congress Journal: 8/77: 38-41.
Hopkins, W.R. and A.J. Lynch (1977) ANAMAX Oxide Plant: A New U.S. Dimension. Engineering & Mining Journal: 2/77: 56.
Kelly, J.L. (1977) Geology of the Twin Buttes copper deposit, Pima County, Arizona: American Institute of Mining, Metallurgical, and Petroleum Engineers, Society of Mining Engineers, Transactions: 262: 110-116.
Pay Dirt (1977), (Drying concentrate, exploration): 4/25/77: 57.
Skillings Mining Review (1977) ANAMAX Mining Co.’s Copper Operations at Twin Buttes Mine (Oxide Plant, Mining Equipment, Exploration): 6/4/77: 12-16.
World Mining (1977) (Reserves, Mining Rate, Recovery, Production Stats): 5/77: 96-99.
Barter, C.F. (1978) Stratigraphy, alteration, and ore controls in the main ore zone, Twin Buttes mine, Pima County, Arizona [abs.], in Jenney, J.P., and Hauck, H.R., eds., Proceedings of the Porphyry Copper Symposium, Tucson, Ariz., March 18-20, 1976: Arizona Geological Society Digest: 11: 115-116.
Skillings Mining Review (1980): 5/24/1980: 7.
Barter, C.F., and Kelly, J.L. (1982) Geology of the Twin Buttes mineral deposit, Pima mining district, Pima County, Arizona, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 407-432.
Mining Annual Review (1985): 55.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
Mining Magazine (1991) Moly and More from Sierrita: July, 1991.
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 13 (Table 1).
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 101, 111, 113, 117, 142, 146, 152, 153, 158, 163, 166, 174, 176, 196, 201, 204, 205, 207, 208, 215, 225-226, 233, 240, 246, 262, 266, 268, 272, 286, 298, 302, 305, 307, 314, 319, 324, 326, 332, 334, 341, 343, 346, 353, 354, 359, 363, 368, 377, 382, 385, 388, 391, 393, 397, 399, 400, 402, 405, 409, 411, 414, 424, 426.
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Singer, Donald A., Berger, Vladimir Iosifovich, Moring, Barry C. (2005) Porphyry copper deposits of the world: database, map, and grade and tonnage models. Open-File Report 2005-1060. US Geological Survey doi:10.3133/ofr20051060
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
(n.d.) ADMMR Mines Database, Arizona Geological Survey.
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