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Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USAi
Regional Level Types
Contention-Grand Central Mine groupGroup of Mines
Tombstone Mining DistrictMining District
Cochise CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
31° 42' 5'' North , 110° 3' 42'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Deposit first discovered:
1885
Nearest Settlements:
PlacePopulationDistance
Tombstone1,312 (2017)1.4km
Whetstone2,617 (2017)26.3km
Saint David1,699 (2011)26.7km
Huachuca City1,755 (2017)27.0km
Sierra Vista43,355 (2017)28.1km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Huachuca Mineral and Gem ClubSierra Vista, Arizona28km
Sunsites Gem and Mineral ClubPearce, Arizona32km
Mindat Locality ID:
32909
Long-form identifier:
mindat:1:2:32909:6
GUID (UUID V4):
0


A former medium-output surface and underground Ag-Au-Pb-Cu-Zn group of mines located in the SE ¼ sec. 11 & the NE¼NE¼ sec. 14, T.20S., R.22E, 1 mile (1.61 km) S of Tombstone, on private land. Discovered and started producing in 1885. Owned at times, or in part, by the Western Mining Co., Grand Central Mining Co., Tombstone Mill & Mining Co., Head Center Co., Head Center & Tranquility Co., Contention Mining Co., Tombstone Consolidated Mines Co., Bunker Hill Mines Co., and the Tombstone Development Co. Operated by the Cochise Silver Mines Inc. (1987); and, Cowichan Resources Inc. (1989). The Grand Central Mine is often referred to as part of this mine due to common ownership.

Mineralization is oxidized argentiferous and auriferous galena and minor copper and zinc ores in large, rich orebodies in faulted and fractured segments of a large dike, and in brecciated footwall zones of the dike. Ore was also found in replacements of Cretaceous Bisbee Group limestone beds where intersected by "northeast" fissures. The ore zone is 1,005.84 meters long, 304.8 meters wide, with a depth to bottom of 243.84 meters. The Bisbee Limestone is recrystallized. An associated rock unit is the Schiefflin Granodiorite.

Local structures include the Tombstone Basin; NE-trending fissures, and NW-trending faults. The Contention Dike is faulted by a series of NW-trending normal faults.

Workings included extensive shaft(s) and had a total length of 3,048 meters and a depth of 243.84 meters. This mine had 3 shafts: the Central shaft, the Pump shaft, used for UTM 1000 feet (ca. 305 m) north of the Grand Central shaft. 10 levels of workings. The workings described here are in the Contention, Head Center, and Flora Morrison claims only. The main workings were in the upper 500 feet (ca. 152 m), the 6th level is the most extensive. One of the earliest and most productive mine groups of the district. Over $10,000,000 was produced prior to 1886 and several hundred thousand tons were produced from the 1880s to the early 1900s. There was some sporadic production up to 1929. Most productive ore zone of the district when combined with the Grand Central Mine. See the Grand Central for production after 1885 in ABGMT-USBM file data. Workings in 3 claims described here: Flora Morrison, Contention, and the Head Center. This mine was under development to leach dump and tailings material in 1987. This was an open pit-cyanide heap leaching operation in 1989.

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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

28 valid minerals. 6 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc. 1 erroneous literature entry.

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aldomarinoite
Formula: Sr2Mn3+(AsO4)2(OH)
Description: see https://www.mindat.org/mesg-573772.html
ⓘ Altaite
Formula: PbTe
Description: Occurs rimmed by dunhamite.
ⓘ Anatase
Formula: TiO2
References:
✪ Backite (TL)
Formula: Pb2AlTeO6Cl
Type Locality:
Habit: Hexagonal plates stacked on each other.
Colour: Gray to white.
✪ Bairdite
Formula: Pb2Cu2+4Te6+2O10(OH)2(SO4) · H2O
Habit: Monoclinic crystal shaped like a spear.
Colour: Bright, fluorescent green.
References:
Thorne, Brent (n.d.) Personal communcation.Brent Thorne specimen. EDS and XRD analyzed.
ⓘ Cerussite
Formula: PbCO3
ⓘ Chlorargyrite
Formula: AgCl
Description: Micro-crystals.
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ 'Dunhamite'
Formula: PbTeO3(?)
Description: ccurs as rims on altaite and associated with rodalquilarite.
ⓘ Emmonsite
Formula: Fe3+2(TeO3)3 · 2H2O
ⓘ Fairbankite (TL)
Formula: Pb2+12(Te4+O3)11(SO4)
Type Locality:
Habit: Crystals less than 0.5 mm
Colour: Colorless
Description: Tiny, clear crystals in thin crusts plastered of walls of voids left by leaching of galena. Closely associated with oboyerite.
✪ Flaggite (TL)
Formula: Pb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O)
Type Locality:
ⓘ Galena
Formula: PbS
ⓘ Galena var. Gold-bearing Galena
Formula: PbS with Au
References:
Locality descriptionIdentification: Visual Identification
ⓘ Galena var. Silver-bearing Galena
Formula: PbS with Ag
ⓘ 'Girdite'
Formula: H2Pb3(Te4+O3)(Te6+O6)
Description: Occurs as dense, chalky spherules to 3 mm diameter & some to 6 mm.
ⓘ Hessite
Formula: Ag2Te
ⓘ Jarosite
Formula: KFe3+3(SO4)2(OH)6
ⓘ 'K Feldspar'
Description: Occurs as a component of quartz-adularia-opal rock formed by alteration of granodiorite.
ⓘ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
Description: Occurs as a component of quartz-adularia-opal rock formed by alteration of granodiorite.
ⓘ Linarite
Formula: PbCu(SO4)(OH)2
ⓘ Murphyite (TL)
Formula: Pb(Te6+O4)
Type Locality:
ⓘ Native Gold
Formula: Au
Localities: Reported from at least 6 localities in this region.
ⓘ Native Silver
Formula: Ag
Description: Occurs as small masses of wire silver clinging to iron-stained, drusy quartz.
ⓘ 'Oboyerite' (FRL)
Type Locality:
Colour: Milk-white
Description: Occurs as spherules perched on clear, botryoidal opal (hyalite), in turn coating jarosite filling voids left in altered shale by removal of galena.
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Opal var. Opal-AN
Formula: SiO2 · nH2O
ⓘ Ottoite
Formula: Pb2TeO5
ⓘ Plumbotellurite
Formula: Pb(TeO3)
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
Description: Occurs as a component of quartz-adularia-opal rock formed by alteration of granodiorite.
ⓘ Raspite
Formula: Pb(WO4)
ⓘ Rodalquilarite
Formula: Fe2(TeO2OH)3(TeO3)Cl
✪ Schieffelinite
Formula: Pb10Te6+6O20(OH)14(SO4)(H2O)5
✪ Tombstoneite (TL)
Formula: (Ca0.5Pb0.5)Pb3Cu2+6Te6+2O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Type Locality:
✪ Winstanleyite (TL)
Formula: TiTe4+3O8
Type Locality:
Habit: simple cubes to 0.5 mm on an edge
Colour: Yellow, tan, cream-colored
Description: Occurs in a quartz-adularia-opal rock formed by alteration of granodiorite.
ⓘ Wulfenite
Formula: Pb(MoO4)
References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
ⓘNative Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
ⓘHessite2.BA.60Ag2Te
ⓘAltaite2.CD.10PbTe
ⓘGalena2.CD.10PbS
ⓘvar. Silver-bearing Galena2.CD.10PbS with Ag
ⓘvar. Gold-bearing Galena2.CD.10PbS with Au
ⓘPyrite2.EB.05aFeS2
Group 3 - Halides
ⓘChlorargyrite3.AA.15AgCl
Group 4 - Oxides and Hydroxides
ⓘ'Oboyerite' (TL)4..
ⓘQuartz4.DA.05SiO2
ⓘOpal
var. Opal-AN
4.DA.10SiO2 · nH2O
ⓘ4.DA.10SiO2 · nH2O
ⓘAnatase4.DD.05TiO2
ⓘRaspite4.DG.20Pb(WO4)
ⓘWinstanleyite (TL)4.JK.05TiTe4+3O8
ⓘFairbankite (TL)4.JK.50Pb2+12(Te4+O3)11(SO4)
ⓘPlumbotellurite4.JK.55Pb(TeO3)
ⓘRodalquilarite4.JL.05Fe2(TeO2OH)3(TeO3)Cl
ⓘ'Girdite'4.JL.30H2Pb3(Te4+O3)(Te6+O6)
ⓘEmmonsite4.JM.10Fe3+2(TeO3)3 · 2H2O
ⓘTombstoneite (TL)4.JN.(Ca0.5Pb0.5)Pb3Cu2+6Te6+2O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Group 5 - Nitrates and Carbonates
ⓘCerussite5.AB.15PbCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘOttoite7.AB.25Pb2TeO5
ⓘMurphyite (TL)7.AD.Pb(Te6+O4)
ⓘBackite (TL)7.BC.Pb2AlTeO6Cl
ⓘJarosite7.BC.10KFe3+3(SO4)2(OH)6
ⓘLinarite7.BC.65PbCu(SO4)(OH)2
ⓘSchieffelinite7.CD.55Pb10Te6+6O20(OH)14(SO4)(H2O)5
ⓘBairdite7.DF.Pb2Cu2+4Te6+2O10(OH)2(SO4) · H2O
ⓘFlaggite (TL)7.DF.Pb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O)
ⓘWulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘAldomarinoite ?8.BG.Sr2Mn3+(AsO4)2(OH)
Group 9 - Silicates
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'K Feldspar
var. Adularia'
-KAlSi3O8
ⓘ'Dunhamite'-PbTeO3(?)
ⓘ'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ EmmonsiteFe23+(TeO3)3 · 2H2O
Hⓘ GirditeH2Pb3(Te4+O3)(Te6+O6)
Hⓘ Opal var. Opal-ANSiO2 · nH2O
Hⓘ JarositeKFe33+(SO4)2(OH)6
Hⓘ LinaritePbCu(SO4)(OH)2
Hⓘ OpalSiO2 · nH2O
Hⓘ RodalquilariteFe2(TeO2OH)3(TeO3)Cl
Hⓘ SchieffelinitePb10Te66+O20(OH)14(SO4)(H2O)5
Hⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Hⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Hⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Hⓘ AldomarinoiteSr2Mn3+(AsO4)2(OH)
CCarbon
Cⓘ CerussitePbCO3
OOxygen
Oⓘ K Feldspar var. AdulariaKAlSi3O8
Oⓘ AnataseTiO2
Oⓘ CerussitePbCO3
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ DunhamitePbTeO3(?)
Oⓘ EmmonsiteFe23+(TeO3)3 · 2H2O
Oⓘ FairbankitePb122+(Te4+O3)11(SO4)
Oⓘ GirditeH2Pb3(Te4+O3)(Te6+O6)
Oⓘ Opal var. Opal-ANSiO2 · nH2O
Oⓘ JarositeKFe33+(SO4)2(OH)6
Oⓘ LinaritePbCu(SO4)(OH)2
Oⓘ OpalSiO2 · nH2O
Oⓘ PlumbotelluritePb(TeO3)
Oⓘ QuartzSiO2
Oⓘ RaspitePb(WO4)
Oⓘ RodalquilariteFe2(TeO2OH)3(TeO3)Cl
Oⓘ SchieffelinitePb10Te66+O20(OH)14(SO4)(H2O)5
Oⓘ WinstanleyiteTiTe34+O8
Oⓘ WulfenitePb(MoO4)
Oⓘ OttoitePb2TeO5
Oⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Oⓘ BackitePb2AlTeO6Cl
Oⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Oⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Oⓘ AldomarinoiteSr2Mn3+(AsO4)2(OH)
Oⓘ MurphyitePb(Te6+O4)
AlAluminium
Alⓘ K Feldspar var. AdulariaKAlSi3O8
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ BackitePb2AlTeO6Cl
SiSilicon
Siⓘ K Feldspar var. AdulariaKAlSi3O8
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ Opal var. Opal-ANSiO2 · nH2O
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
SSulfur
Sⓘ FairbankitePb122+(Te4+O3)11(SO4)
Sⓘ GalenaPbS
Sⓘ JarositeKFe33+(SO4)2(OH)6
Sⓘ LinaritePbCu(SO4)(OH)2
Sⓘ PyriteFeS2
Sⓘ SchieffelinitePb10Te66+O20(OH)14(SO4)(H2O)5
Sⓘ Galena var. Silver-bearing GalenaPbS with Ag
Sⓘ Galena var. Gold-bearing GalenaPbS with Au
Sⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Sⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Sⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
ClChlorine
Clⓘ ChlorargyriteAgCl
Clⓘ RodalquilariteFe2(TeO2OH)3(TeO3)Cl
Clⓘ BackitePb2AlTeO6Cl
KPotassium
Kⓘ K Feldspar var. AdulariaKAlSi3O8
Kⓘ JarositeKFe33+(SO4)2(OH)6
CaCalcium
Caⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
TiTitanium
Tiⓘ AnataseTiO2
Tiⓘ WinstanleyiteTiTe34+O8
MnManganese
Mnⓘ AldomarinoiteSr2Mn3+(AsO4)2(OH)
FeIron
Feⓘ EmmonsiteFe23+(TeO3)3 · 2H2O
Feⓘ JarositeKFe33+(SO4)2(OH)6
Feⓘ PyriteFeS2
Feⓘ RodalquilariteFe2(TeO2OH)3(TeO3)Cl
CuCopper
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ LinaritePbCu(SO4)(OH)2
Cuⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Cuⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Cuⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
AsArsenic
Asⓘ AldomarinoiteSr2Mn3+(AsO4)2(OH)
SeSelenium
Seⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
SrStrontium
Srⓘ AldomarinoiteSr2Mn3+(AsO4)2(OH)
MoMolybdenum
Moⓘ WulfenitePb(MoO4)
AgSilver
Agⓘ ChlorargyriteAgCl
Agⓘ HessiteAg2Te
Agⓘ Native SilverAg
Agⓘ Galena var. Silver-bearing GalenaPbS with Ag
TeTellurium
Teⓘ AltaitePbTe
Teⓘ DunhamitePbTeO3(?)
Teⓘ EmmonsiteFe23+(TeO3)3 · 2H2O
Teⓘ FairbankitePb122+(Te4+O3)11(SO4)
Teⓘ GirditeH2Pb3(Te4+O3)(Te6+O6)
Teⓘ HessiteAg2Te
Teⓘ PlumbotelluritePb(TeO3)
Teⓘ RodalquilariteFe2(TeO2OH)3(TeO3)Cl
Teⓘ SchieffelinitePb10Te66+O20(OH)14(SO4)(H2O)5
Teⓘ WinstanleyiteTiTe34+O8
Teⓘ OttoitePb2TeO5
Teⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Teⓘ BackitePb2AlTeO6Cl
Teⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Teⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Teⓘ MurphyitePb(Te6+O4)
WTungsten
Wⓘ RaspitePb(WO4)
AuGold
Auⓘ Native GoldAu
Auⓘ Galena var. Gold-bearing GalenaPbS with Au
PbLead
Pbⓘ AltaitePbTe
Pbⓘ CerussitePbCO3
Pbⓘ DunhamitePbTeO3(?)
Pbⓘ FairbankitePb122+(Te4+O3)11(SO4)
Pbⓘ GalenaPbS
Pbⓘ GirditeH2Pb3(Te4+O3)(Te6+O6)
Pbⓘ LinaritePbCu(SO4)(OH)2
Pbⓘ PlumbotelluritePb(TeO3)
Pbⓘ RaspitePb(WO4)
Pbⓘ SchieffelinitePb10Te66+O20(OH)14(SO4)(H2O)5
Pbⓘ WulfenitePb(MoO4)
Pbⓘ Galena var. Silver-bearing GalenaPbS with Ag
Pbⓘ Galena var. Gold-bearing GalenaPbS with Au
Pbⓘ OttoitePb2TeO5
Pbⓘ BairditePb2Cu42+Te26+O10(OH)2(SO4) · H2O
Pbⓘ BackitePb2AlTeO6Cl
Pbⓘ FlaggitePb4Cu42+Te26+(SO4)2O11(OH)2(H2O)
Pbⓘ Tombstoneite(Ca0.5Pb0.5)Pb3Cu62+Te26+O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O
Pbⓘ MurphyitePb(Te6+O4)

Other Databases

Link to USGS MRDS:10048228

Localities in this Region

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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