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Quijotoa Mining District, Quijotoa Mountains, Pima County, Arizona, USAi
Regional Level Types
Quijotoa Mining DistrictMining District
Quijotoa MountainsMountain Range
Pima CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
32° North , 112° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Köppen climate type:
Mindat Locality ID:
36302
Long-form identifier:
mindat:1:2:36302:7
GUID (UUID V4):
7ec73555-5316-44d9-93a3-739cc32c2e45


Ref.: 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: 178-179.

Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 77-78.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 139 (Table 4).

Arizona Bureau of Mines file data.

A Ag-Au-Cu-Pb-Zn-U-Ba + limestone & quartzite mining area located in T.13-16S., R.2-3E. in the Quijotoa Mountains, Ben Nevis Mountain, Sierra Blanca, and the Brownell Mountains, forming a North-South strip of localities from dead North of the town of Quijotoa, southward to its West and continuing to dead South of the town.

Mineralization is varied: (1) Spotty, irregular, and local silver and gold values with minor, largely oxidized, base metal sulfides in irregular quartz, calcite, hematite, manganese oxides, and gouge along fissure and breccia zones accompanying strong faults cutting Cretaceous and Tertiary volcanic and sedimentary formations; (2) Spotty and bunchy, oxidized base metal sulfgides with enriched precious metals along faults and fractures cutting Laramide grantitic intrusive - Cretaceous or early Tertiary volcanic and sedimentary formation contacts. Traces of uranium mineralization; (3) Gold placer deposits in valley alluvium; and, (4) Paleozoic limestone and quartzite in a thrust-faulted sliver in Laramide metamorphics.

Workings include numerous, small, relatively shallow mines and prospects, some with spectacular high-grade silver-gold pockets. Worked sporadically since the 1880's and up through 1972. Produced some 15,600 tons of ore containing about 233,000 oz. Ag, 10,000 oz. Au, 66 tons of Cu, and 29 tons of Pb. Some 1,400 oz. of gold have been produced from dry placer operations since the 1700's.

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

39 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Albite
Formula: Na(AlSi3O8)
Description: Colored red by rich disseminations of hematite.
Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: Forms a later groundmass of the spessartite.
Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Anglesite
Formula: PbSO4
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Habit: Euhedral crystals to 10 cm long
Description: Early mineral in the contact phase.
Azurite
Formula: Cu3(CO3)2(OH)2
Description: Sparse.
Baryte
Formula: BaSO4
Habit: Rosette-shaped aggregates to 15 cm
Colour: Pink
Calcite
Formula: CaCO3
Localities: Reported from at least 10 localities in this region.
Cerussite
Formula: PbCO3
Chalcocite
Formula: Cu2S
Chalcopyrite
Formula: CuFeS2
Chlorargyrite
Formula: AgCl
'Chlorite Group'
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Description: Small amounts present as alteration product of the mafites.
'Davidite'
Description: Occurs as dark, pitchy-lustered masses in a matrix of feldspar and titanite.
Davidite-(La)
Formula: La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Colour: Dark brown
Description: Pitchy-lustered masses in matrix; nearly entirely metamict.
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
'Feldspar Group'
Fluorite
Formula: CaF2
Galena
Formula: PbS
Localities: Reported from at least 6 localities in this region.
Galena var. Silver-bearing Galena
Formula: PbS with Ag
Goethite
Formula: α-Fe3+O(OH)
Gold
Formula: Au
Localities: Reported from at least 9 localities in this region.
Description: Lode gold along shear zones & fractures.
'Gummite'
Description: Occurs in a vein cutting arkose.
Gypsum
Formula: CaSO4 · 2H2O
Description: Secondary mineral.
Gypsum var. Selenite
Formula: CaSO4 · 2H2O
Hematite
Formula: Fe2O3
Localities: Reported from at least 10 localities in this region.
Ilmenite
Formula: Fe2+TiO3
Jarosite
Formula: KFe3+3(SO4)2(OH)6
'Limonite'
Litharge
Formula: PbO
Magnetite
Formula: Fe2+Fe3+2O4
Malachite
Formula: Cu2(CO3)(OH)2
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Microcline ?
Formula: K(AlSi3O8)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Orthoclase ?
Formula: K(AlSi3O8)
Description: Occurs with some late albite and quartz as a late granophyric product in the spessartite (late keratophyric stage).
Pyrite
Formula: FeS2
Localities: Reported from at least 7 localities in this region.
Quartz
Formula: SiO2
Rutile
Formula: TiO2
Description: In wallrock; partly replaced by titanite; replaces an opaque mineral that may be davidite.
'Silica'
Spessartine
Formula: Mn2+3Al2(SiO4)3
Description: Occurs as a dense green rock.
Sphalerite
Formula: ZnS
Titanite
Formula: CaTi(SiO4)O
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Description: Occurs in a vein cutting arkose.
'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
Uraninite
Formula: UO2
Description: Traces.
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

Gallery:

BaSO4 Baryte

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Acanthite2.BA.35Ag2S
Sphalerite2.CB.05aZnS
Chalcopyrite2.CB.10aCuFeS2
Galena
var. Silver-bearing Galena
2.CD.10PbS with Ag
2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 3 - Halides
Chlorargyrite3.AA.15AgCl
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Litharge4.AC.20PbO
Magnetite4.BB.05Fe2+Fe3+2O4
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Davidite-(La)4.CC.40La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Baryte7.AD.35BaSO4
Jarosite7.BC.10KFe3+3(SO4)2(OH)6
Gypsum7.CD.40CaSO4 · 2H2O
var. Selenite7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Metatorbernite8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Group 9 - Silicates
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Titanite9.AG.15CaTi(SiO4)O
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Allanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Orthoclase ?9.FA.30K(AlSi3O8)
Microcline ?9.FA.30K(AlSi3O8)
Albite
var. Oligoclase
9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
var. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
9.FA.35Na(AlSi3O8)
Unclassified
'Silica'-
'Davidite'-
'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
'Limonite'-
'Gummite'-
'Chlorite Group'-
'Feldspar Group'-
'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 Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
H AzuriteCu3(CO3)2(OH)2
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H Goethiteα-Fe3+O(OH)
H GypsumCaSO4 · 2H2O
H JarositeKFe33+(SO4)2(OH)6
H MalachiteCu2(CO3)(OH)2
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H Gypsum var. SeleniteCaSO4 · 2H2O
H Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
BBoron
B TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C CerussitePbCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O AlbiteNa(AlSi3O8)
O Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
O Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
O AnglesitePbSO4
O AzuriteCu3(CO3)2(OH)2
O BaryteBaSO4
O CalciteCaCO3
O CerussitePbCO3
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O Goethiteα-Fe3+O(OH)
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O IlmeniteFe2+TiO3
O JarositeKFe33+(SO4)2(OH)6
O LithargePbO
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O RutileTiO2
O SpessartineMn32+Al2(SiO4)3
O TitaniteCaTi(SiO4)O
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O TourmalineAD3G6 (T6O18)(BO3)3X3Z
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O Gypsum var. SeleniteCaSO4 · 2H2O
O Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
O ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
F Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
F FluoriteCaF2
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Na Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Al Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Al OrthoclaseK(AlSi3O8)
Al SpessartineMn32+Al2(SiO4)3
Al Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si AlbiteNa(AlSi3O8)
Si Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Si Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SpessartineMn32+Al2(SiO4)3
Si TitaniteCaTi(SiO4)O
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
PPhosphorus
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S AcanthiteAg2S
S AnglesitePbSO4
S BaryteBaSO4
S ChalcopyriteCuFeS2
S ChalcociteCu2S
S GalenaPbS
S GypsumCaSO4 · 2H2O
S JarositeKFe33+(SO4)2(OH)6
S PyriteFeS2
S SphaleriteZnS
S Gypsum var. SeleniteCaSO4 · 2H2O
S Galena var. Silver-bearing GalenaPbS with Ag
ClChlorine
Cl ChlorargyriteAgCl
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K JarositeKFe33+(SO4)2(OH)6
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Ca Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Ca CalciteCaCO3
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
Ca Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Ca TitaniteCaTi(SiO4)O
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca Gypsum var. SeleniteCaSO4 · 2H2O
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
VVanadium
V Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
CrChromium
Cr Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Fe ChalcopyriteCuFeS2
Fe Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe JarositeKFe33+(SO4)2(OH)6
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu MalachiteCu2(CO3)(OH)2
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Zn SphaleriteZnS
YYttrium
Y Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
AgSilver
Ag AcanthiteAg2S
Ag ChlorargyriteAgCl
Ag Galena var. Silver-bearing GalenaPbS with Ag
BaBarium
Ba BaryteBaSO4
LaLanthanum
La Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
CeCerium
Ce Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
AuGold
Au GoldAu
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb LithargePbO
Pb Galena var. Silver-bearing GalenaPbS with Ag
UUranium
U Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Localities in this Region

Other Regions, Features and Areas containing this locality

Mexico
North America
North America PlateTectonic Plate
USA

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