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Standard and Thunder prospects (Thunder and Standard Mine group), Alum Gulch, Harshaw Mining District, Patagonia Mountains, Santa Cruz Co., Arizona, USAi
Regional Level Types
Standard and Thunder prospects (Thunder and Standard Mine group)Group of Prospects
Alum GulchGulch
Harshaw Mining DistrictMining District
Patagonia MountainsMountain Range
Santa Cruz Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
31° 26' 40'' North , 110° 44' 54'' West
Latitude & Longitude (decimal):
Locality type:
Group of Prospects
Nearest Settlements:
PlacePopulationDistance
Patagonia890 (2017)10.6km
Kino Springs136 (2011)10.8km
Beyerville177 (2011)13.7km
Francisco Miguel Cárdenas Valdez (Mascareñas)541 (2014)19.3km
Nogales20,252 (2017)21.1km


‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 256-257.

Simons, F.S. (1974) Geologic map and sections of the Nogales and Lochiel
quadrangles, Santa Cruz County, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-762, 9 p., 1 sheet, scale 1:48,000.

Arizona Bureau of Geology and Mineral Technology file data.

MRDS database Dep. ID file #10037095, MRDS #M030390.

A group of 2 Cu-Ag-Au-Mo prospects with underground workings located in the SE¼ sec. 23, T23S, R16E, 2/3 mile south of the Sunnyside Mine and 1½ miles west of American Peak in the extreme head of Alum Gulch, 3 miles SW of Harshaw, on National Forest land. The property comprises the Thunder group of 8 claims and, adjacent to the N, the Standard group of 14 claims.

The deposits are similar to those of the Sunnyside Mine. They occur in shear or sheeting zones in the granite porphyry country rock and contain principally copper minerals. Alteration is silicification. Volcanic rocks are highly altered to quartz, alunite and kaolinite. The associated rock units are the Mt. Wrightson formation, rhyolite and latite flows and tuffs and tuffaceous sandstone. The ore zone depth to top is 6.1 meters. Local structures include NW shear zones and an ENE system of faults and joints with a flat southerly dip. A local tectonic feature is the Thunder Mine block.

Workings include an 82 foot (24.99 meters) tunnel on the Thunder group of claims and a 40 foot shaft on the Standard group of claims. No records of production. The ore was reported to average 0.6% Cu, 2 oz/t Ag, and 40 oz/t Au (1915).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

6 valid minerals.

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
Reference: MRDS database Dep. ID file #10037095, MRDS #M030390.
Chalcocite
Formula: Cu2S
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 256.
Chalcopyrite
Formula: CuFeS2
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: MRDS database Dep. ID file #10037095, MRDS #M030390.
Molybdenite
Formula: MoS2
Pyrite
Formula: FeS2
'Tetrahedrite'
Formula: Cu6(Cu4X2)Sb4S13

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
'Tetrahedrite'2.GB.05Cu6(Cu4X2)Sb4S13
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite7.BC.10KAl3(SO4)2(OH)6
Group 9 - Silicates
Kaolinite9.ED.05Al2(Si2O5)(OH)4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
'Tetrahedrite'3.3.6.1Cu6(Cu4X2)Sb4S13
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Unclassified Minerals, Mixtures, etc.
Kaolinite-Al2(Si2O5)(OH)4

List of minerals for each chemical element

HHydrogen
H AluniteKAl3(SO4)2(OH)6
H KaoliniteAl2(Si2O5)(OH)4
OOxygen
O AluniteKAl3(SO4)2(OH)6
O KaoliniteAl2(Si2O5)(OH)4
AlAluminium
Al AluniteKAl3(SO4)2(OH)6
Al KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Si KaoliniteAl2(Si2O5)(OH)4
SSulfur
S ChalcociteCu2S
S PyriteFeS2
S ChalcopyriteCuFeS2
S TetrahedriteCu6(Cu4X2)Sb4S13
S MolybdeniteMoS2
S AluniteKAl3(SO4)2(OH)6
KPotassium
K AluniteKAl3(SO4)2(OH)6
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu TetrahedriteCu6(Cu4X2)Sb4S13
MoMolybdenum
Mo MolybdeniteMoS2
SbAntimony
Sb TetrahedriteCu6(Cu4X2)Sb4S13

Other Databases

USGS MRDS Record:10037095

Localities in this Region

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North America PlateTectonic Plate

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