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Old Baldy Mining District, Santa Cruz County, Arizona, USAi
Regional Level Types
Old Baldy Mining DistrictMining District
Santa Cruz CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
31° North , 110° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~51km
Locality type:


Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 166-180.

Whitacre, H.E., 1964, Geology of the Madera-Agua Caliente Canyon area, southern Arizona: Tucson, University of Arizona, M.S. thesis, 41 p.

Drewes, H.D. (1971) Geologic map of the Mount Wrightson quadrangle, southeast of Tucson, Santa Cruz and Pima Counties, Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-614, 1 sheet, scale 1:48,000.

Drewes, H.D. (1972) Cenozoic rocks of the Santa Rita Mountains, southeast of Tucson, Arizona: U.S. Geological Survey Professional Paper 746, 66 p.

Drewes, H.D. (1972) Structural geology of the Santa Rita Mountains, southeast of Tucson, Arizona: U.S. Geological Survey Professional Paper 748, 35 p., scale 1:12,000, 4 sheets.

Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 61 (Table 4). Arizona Bureau of Mines file data.

A Cu-Pb-Zn-Ag-Au-Mo mining area located in T.20S., R.14E., on the West slope of the Santa Rita Mts, on the drainage of that part of Madera Canyon which is within Santa Cruz Co.

Mineralization is spotty and weak, partially oxidized, base metal sulfides with associated minor gold and silver values, with or without quartz, along shear zones in LAramide intrusives or metamorphosed volcanics.

Workings are scattered, small, and generally shallow operations. Mostly prospects with no recorded production.

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

23 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 176-177.
Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 176-177.
Arsenopyrite
Formula: FeAsS
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 177.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 179.
Baryte
Formula: BaSO4
Description: A little.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 175-176.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 176-177.
Bornite
Formula: Cu5FeS4
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 179.
Calcite
Formula: CaCO3
Colour: White to black
Description: Coarsely crystalline, variously colored bodies in altered schist.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 176.
Cerussite
Formula: PbCO3
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 179.
Chalcocite
Formula: Cu2S
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 178.
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 9 localities in this region.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Cuprite
Formula: Cu2O
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 178.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Colour: Dark green
Description: Occurs in/with amphibolite.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 175-176.
Galena
Formula: PbS
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 177.
'Garnet Group'
Formula: X3Z2(SiO4)3
Description: Occurs near a contact.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 175-176.
Gold
Formula: Au
Reference: MRDS database Dep. ID file #10037132, MRDS ID #M030557.
Hematite
Formula: Fe2O3
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 177.
Hematite var. Specularite
Formula: Fe2O3
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 177.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Colour: Yellowish
Description: Occurs as a soft, earthy material which looks like clay.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174-175.
'Limonite'
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Magnetite
Formula: Fe2+Fe3+2O4
Description: As phenocrysts in lamprophyric porphyry.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 176.; Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 176-177.
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 6 localities in this region.
Description: Mostly as stains.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 175-176.
Molybdenite
Formula: MoS2
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Alteration product of feldspars.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 176.
Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Alteration product of feldspars.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 176.
Orthoclase
Formula: K(AlSi3O8)
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 176-177.
'Psilomelane'
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 179.
Pyrite
Formula: FeS2
Localities: Reported from at least 7 localities in this region.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Quartz
Formula: SiO2
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Quartz var. Smoky Quartz
Formula: SiO2
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 174.
Sphalerite
Formula: ZnS
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 179.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
var. Specularite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var. Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
'Garnet Group'-X3Z2(SiO4)3
'Limonite'-
'Psilomelane'-

List of minerals for each chemical element

HHydrogen
H JarositeKFe3+ 3(SO4)2(OH)6
H MalachiteCu2(CO3)(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
H AzuriteCu3(CO3)2(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
C AzuriteCu3(CO3)2(OH)2
C CerussitePbCO3
OOxygen
O QuartzSiO2
O JarositeKFe3+ 3(SO4)2(OH)6
O Quartz var. Smoky QuartzSiO2
O MalachiteCu2(CO3)(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O BaryteBaSO4
O Garnet GroupX3Z2(SiO4)3
O CalciteCaCO3
O MagnetiteFe2+Fe23+O4
O Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
O Hematite var. SpeculariteFe2O3
O CupriteCu2O
O AzuriteCu3(CO3)2(OH)2
O CerussitePbCO3
O OrthoclaseK(AlSi3O8)
O Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O HematiteFe2O3
O AlbiteNa(AlSi3O8)
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
NaSodium
Na Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
SiSilicon
Si QuartzSiO2
Si Quartz var. Smoky QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si AlbiteNa(AlSi3O8)
SSulfur
S MolybdeniteMoS2
S PyriteFeS2
S ChalcopyriteCuFeS2
S JarositeKFe3+ 3(SO4)2(OH)6
S BaryteBaSO4
S ArsenopyriteFeAsS
S GalenaPbS
S ChalcociteCu2S
S BorniteCu5FeS4
S SphaleriteZnS
KPotassium
K JarositeKFe3+ 3(SO4)2(OH)6
K Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe MagnetiteFe2+Fe23+O4
Fe Hematite var. SpeculariteFe2O3
Fe ArsenopyriteFeAsS
Fe BorniteCu5FeS4
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Fe HematiteFe2O3
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
Cu ChalcociteCu2S
Cu CupriteCu2O
Cu BorniteCu5FeS4
Cu AzuriteCu3(CO3)2(OH)2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
MoMolybdenum
Mo MolybdeniteMoS2
BaBarium
Ba BaryteBaSO4
AuGold
Au GoldAu
PbLead
Pb GalenaPbS
Pb CerussitePbCO3

Localities in this Region

Other Regions, Features and Areas containing this locality

Mexico
North America
North America PlateTectonic Plate
USA

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.
 
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