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Esperanza Mine group [old], Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima Co., Arizona, USAi
Regional Level Types
Esperanza Mine group [old]- not defined -
Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District)Mining District
Sierrita MountainsMountain Range
Pima Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
31° 51' 45'' North , 111° 6' 59'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Green Valley21,391 (2011)11.6km
Arivaca Junction1,090 (2011)15.9km
Amado295 (2011)17.9km
Sahuarita25,707 (2017)18.5km
East Sahuarita1,622 (2006)19.9km


Ref.: Ransome, F.L. (1922) Ore deposits of the Sierrita Mountains, Pima County, Arizona, in Contributions to Economic Geology (Short Papers and Preliminary Reports), 1921 - Part I.--Metals and Nonmetals except Fuels: U.S. Geological Survey Bulletin 725J: 427.

Anderson, C.A., and Kupfer, D.H. (1945) Report on the properties of the Amargosa Molybdenum and Copper Corporation, Pima County, Arizona: U.S. Geological Survey Open-File Report [unnumbered], 20 p., 8 sheets.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 135 (Table 4).

USGS Twin Buttes Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10234530, MAS ID #0040190221.

A former surface and underground Pb-Zn-Cu-Ag-Au-Mo mine group located in southern sec. 8, the SW ¼ sec. 9, southern sec. 16, northern sec. 17 & North-central sec. 21, T.18S., R.12E, on land of unknown status. Owned at times, or in part, by the Chesterfield Copper Co.; Elston Esperanza Co.; the Blanche Rose Mining Co.; Pike; and the Magnet Copper Co.

Included at various times the mines listed under this file plus the Crown King and Tiger Mine groups.

Mineralization is partly oxidized, relatively weak and irregular, quartz-calcite fissure veins containing spotty sulfides in Cretaceous sedimentary-volcanic rocks. Locally low-grade, disseminated copper and molybdenum mineralization in siliceous, brecciated Laramide quartz monzonite porphyry, Cretaceous rocks, and quartz masses.

Workings include numerous realtively shallow shafts, adits, pits and small open cuts. Originally prospected in Spanish colonial times. Intermittent production occurred mainly from the early 1900's through 1943, on a small scale, producing about 2,000 tons of ore averaging some 12% Pb, 4% Cu, 12 oz. Ag/T and minor Zn & Au. For later production under Duval, see the Esperanza open pit mine.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

7 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: MRDS database Dep. ID file #10026759, MRDS ID #M000103.
Chalcopyrite
Formula: CuFeS2
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 135 (Table 4); Arizona Bureau of Mines file data.
Galena
Formula: PbS
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 135 (Table 4); Arizona Bureau of Mines file data.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: MRDS database Dep. ID file #10026759, MRDS ID #M000103.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID file #10026759, MRDS ID #M000103.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID file #10026759, MRDS ID #M000103.
Pyrite
Formula: FeS2
Reference: MRDS database Dep. ID file #10026759, MRDS ID #M000103.
Sphalerite
Formula: ZnS
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 135 (Table 4); Arizona Bureau of Mines file data.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Mixtures, etc.
Kaolinite-Al2(Si2O5)(OH)4
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H KaoliniteAl2(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O CalciteCaCO3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O KaoliniteAl2(Si2O5)(OH)4
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al KaoliniteAl2(Si2O5)(OH)4
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si KaoliniteAl2(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S GalenaPbS
S SphaleriteZnS
S ChalcopyriteCuFeS2
S PyriteFeS2
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
PbLead
Pb GalenaPbS

Other Databases

USGS MRDS Record:10234530

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