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Cobre Grande Mine (Duval Sulfur and Potash Co. Mine; Cowboy Mine; Cowboy tunnel), Cobre Grande Mountain, Aravaipa, Aravaipa Mining District, Graham County, Arizona, USAi
Regional Level Types
Cobre Grande Mine (Duval Sulfur and Potash Co. Mine; Cowboy Mine; Cowboy tunnel)Mine
Cobre Grande MountainMountain
AravaipaTown (Former)
Aravaipa Mining DistrictMining District
Graham CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
32° 58' 34'' North , 110° 17' 36'' West
Latitude & Longitude (decimal):
32.97611,-110.29333
GeoHash:
G#: 9tced5ngg
GRN:
N22W67
Type:
Mine
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Bylas1,962 (2011)23.9km
Fort Thomas374 (2011)31.3km
Peridot1,350 (2011)40.1km
Mammoth1,487 (2017)43.0km
Bryce175 (2011)43.7km
Mindat Locality ID:
46252
Long-form identifier:
mindat:1:2:46252:2
GUID (UUID V4):
0


A former underground Cu-Pb-Zn-Ag-Fe mine located in secs. 21, 22, 27 & 28, T5S, R20E, 3.7 miles NE of Imperial Mountain, on National Forest land. Discovered by Julius Riser and W.A. Clark in 1905. Produced 1916-1957. Past operators include the Cobre Grande Co.; Mr. Julius Riser; and the Duval Sulphur and Potash Co. Owned by Snell, Elliot, Fisk, and Alderman of Globe, AZ (1920).

Mineralization is a tabular ore body hosted in Escabrosa Limestone; Horquilla Limestone and thin shale beds. The ore zone is 2.44 meters wide, strikes NNW and dips 85SW. Several zones of mineralization occur in more than one vein. Limestone is replaced in zones both across and parallel to bedding. Silicic dikes intrude the area. The entire area is closely faulted and highly altered. Relationships are obscure. Ore control was faults and bedding planes. Ore concentration was replacement and fissure filling. Alteration was oxidation and silicification. An associated rock unit is diorite.

Area structures include block faulting trending NNW. Regional trends: minor Pre-Cretaceous E- and NE-trending folds and major Post-Cretaceous NNW-trending faults.

Workings included one adit 700 feet long (Cowboy tunnel), raises, and winzes up to 30 feet deep. Workings achieved a depth of 48.77 meters.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


12 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Calcite
Formula: CaCO3
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Hematite
Formula: Fe2O3
ⓘ Hematite var. Specularite
Formula: Fe2O3
ⓘ Johannsenite
Formula: CaMn2+Si2O6
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Tenorite
Formula: CuO

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘTenorite4.AB.10CuO
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘvar. Specularite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘJohannsenite9.DA.15CaMn2+Si2O6
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ ChalcanthiteCuSO4 · 5H2O
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ MalachiteCu2(CO3)(OH)2
CCarbon
Cⓘ CalciteCaCO3
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ CalciteCaCO3
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ HematiteFe2O3
Oⓘ JohannseniteCaMn2+Si2O6
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ QuartzSiO2
Oⓘ TenoriteCuO
Oⓘ Hematite var. SpeculariteFe2O3
Oⓘ Garnet GroupX3Z2(SiO4)3
AlAluminium
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
SiSilicon
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ JohannseniteCaMn2+Si2O6
Siⓘ QuartzSiO2
Siⓘ Garnet GroupX3Z2(SiO4)3
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ PyriteFeS2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ JohannseniteCaMn2+Si2O6
MnManganese
Mnⓘ JohannseniteCaMn2+Si2O6
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ HematiteFe2O3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ Hematite var. SpeculariteFe2O3
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcanthiteCuSO4 · 5H2O
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ TenoriteCuO

Other Databases

Link to USGS MRDS:10039447

Other Regions, Features and Areas containing this locality

North AmericaContinent
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.

References

USGS Cobre Grande Mountain Quadrangle map.
Arizona Department of Mineral Resources Cobre Grande Mountain file.
Arizona Department of Mineral Resources U file.
MRDS database Dep. ID #10039447, MRDS ID #M050093; and Dep. ID #10185895, MAS ID #0040090024.
Ross, Clyde P. (1925) Geology and ore deposits of the Aravaipa and Stanley mining districts, Graham County, Arizona, USGS Bull. 763: 102-103.
Denton, T.C. (1947), Aravaipa lead-zinc deposits, Graham County, Arizona, U.S. Bureau of Mines Report of Investigation 4007: Figure 3, 5.
Simons, F.S. (1964) Geology of the Klondyke Quadrangle Graham and Pinal Counties. USGS Professional Paper 461: 135-136, Plate 1.
Brown, S.D. (1993) Mineral Appraisal of the Coronado National Forest, part 10, Santa Teresa Mountains Unit, Graham County, Arizona, U.S. Bureau of Mines Open File Report MLA 26-93, 53 pp.
Anthony, John W., Williams, Sidney A., Bideaux, Richard A., Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.246
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