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Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USAi
Regional Level Types
Contention-Grand Central Mine group- not defined -
Tombstone Mining DistrictMining District
Cochise CountyCounty
ArizonaState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
31° 42' 5'' North , 110° 3' 42'' West
Latitude & Longitude (decimal):
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):
c766f27b-3ece-4d7d-8487-e9fcc5ac7cd7


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 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 1005.84 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 3048 meters and a depth of 243.84 meters. This mine had 3 shafts: the Central shaft, the Pump shaft, used for UTM 1000 feet 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, 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 1880's to the early 1900's. 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.

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

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

Select Rock List Type

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
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.
Cerussite
Formula: PbCO3
Chlorargyrite
Formula: AgCl
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. 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.
Gold
Formula: Au
Localities: Reported from at least 6 localities in this region.
Description: Occurs in altered dikes as visible flakes, particularly near the dike walls.
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:
'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
Description: Occurs as a component of quartz-adularia-opal rock formed by alteration of granodiorite.
Opal var. Opal-AN
Formula: SiO2 · nH2O
References:
Ottoite
Formula: Pb2TeO5
Plumbotellurite
Formula: Pb(TeO3)
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Description: Drusy.
Raspite
Formula: Pb(WO4)
Rodalquilarite
Formula: Fe2(TeO2OH)3(TeO3)Cl
Schieffelinite
Formula: Pb10Te6+6O20(OH)14(SO4)(H2O)5
Silver
Formula: Ag
Description: Occurs as small masses of wire silver clinging to iron-stained, drusy quartz.
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)

Gallery:

Pb2AlTeO6Cl Backite (TL)
Pb2+12(Te4+O3)11(SO4) Fairbankite (TL)
H2Pb3(Te4+O3)(Te6+O6) 'Girdite'
KFe3+3(SO4)2(OH)6 Jarosite
Pb2TeO5 Ottoite
Fe2(TeO2OH)3(TeO3)Cl Rodalquilarite
Pb10Te6+6O20(OH)14(SO4)(H2O)5 Schieffelinite
(Ca0.5Pb0.5)Pb3Cu2+6Te6+2O6(Te4+O3)6(Se4+O3)2(SO4)2 · 3H2O Tombstoneite (TL)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
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
Pyrite2.EB.05aFeS2
Group 3 - Halides
Chlorargyrite3.AA.15AgCl
Group 4 - Oxides and Hydroxides
'Oboyerite' (TL)4..
Quartz4.DA.05SiO2
Opal4.DA.10SiO2 · nH2O
var. Opal-AN4.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'-
'Dunhamite'-PbTeO3(?)
'K Feldspar
var. Adularia'
-KAlSi3O8

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 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 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 GoldAu
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 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

Mexico
North America
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.

References

 
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