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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 County, 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 CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
31° 51' 45'' North , 111° 6' 59'' West
Latitude & Longitude (decimal):
31.86250,-111.11639
GeoHash:
G#: 9t8vr2rs8
GRN:
N22W67
KΓΆppen climate type:
BSk : Cold semi-arid (steppe) climate
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
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Old Pueblo Lapidary ClubTucson, Arizona44km
Tucson Gem and Mineral SocietyTucson, Arizona44km
Mindat Locality ID:
36246
Long-form identifier:
mindat:1:2:36246:2
GUID (UUID V4):
1673d1ac-f022-427f-941a-2dcc86926196


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 ΒΌ 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 Gallery Strunz Chemical Elements

Mineral List

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

7 valid minerals.

Detailed Mineral List:

β“˜ Calcite
Formula: CaCO3
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ Galena
Formula: PbS
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Pyrite
Formula: FeS2
β“˜ Sphalerite
Formula: ZnS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

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

List of minerals for each chemical element

HHydrogen
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ CalciteCaCO3
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ GalenaPbS
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ CalciteCaCO3
FeIron
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ PyriteFeS2
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
ZnZinc
Znβ“˜ SphaleriteZnS
PbLead
Pbβ“˜ GalenaPbS

Other Databases

Link to USGS MRDS:10234530

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