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El Tigre Mine (Tiger Mine), Little Horn Peak, Big Horn District, Big Horn Mts, Maricopa Co., Arizona, USA

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Latitude & Longitude (WGS84): 33° 44' 35'' North , 113° 11' 27'' West
Latitude & Longitude (decimal): 33.74306,-113.19083
GeoHash:G#: 9mzxbq8zw
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate

‡Ref.: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163; ‡Ref.: Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, AZ Dept. Mines & Min. Resources Open File Rept. 92-10: 10 (Table 1); Allen, G.B. (1985), Economic Geology of the Big Horn Mountains of west-central Arizona: AZ Bur. of Geol. & Min. Tech. open-file report 85-1; AZ Bur. Mines Bull. 137: 163; USGS 15 minute Big Horn Mountains topo map; AZ Dept. Min. Resources (ADMR) El Tigre Mine file; Elsing, M.J. & R.E.S. Heineman (1936), Arizona metal production, AZ Bur. Mines Bull. 140: 94; AZ Dept. Min. Resources (ADMR) "U" file; Cunningham & Butler, AZ Bur. Mines Bull. 137: 157-162; US Bur. Mines card file; MRDS files #10027591 & 10137796.

A former underground Au-Cu-Ag mine located in the NW¼ sec. 20, T.6N., R.4W. (Wickenburg SW 7.5 minute topo map), 15 road miles South of Aguila. Discovered in 1914 by the Sisson Brothers. Worked 1918 to 1924.

33.74333; -113.19028, or 33.74360; -113.19030.

Mineralization is hosted in fine-grained gneissic granite intruded by basic dike rocks. Floors a hilly pediment. The ore occurs within a nearly flat fault zone that consists of massive to coarse-grained, shiny quartz with abundant specularite and limonite. Wall rock is notably altered to sericite and have spotty, moderately intense alteration. The orebody is very lenticular with a maximum wodth of about 5 feet (1.5 meters). Ore control was a flat fault zone. Related structures are the Little Horn Peak fault and the Flat Fault zone.

Workings include 3 inclined shafts (50, 197 & 200 feet deep, respectively). Production was more than $14,454 in Au (period values).

Regions containing this locality

Sonoran Desert, North America

Desert - 1,135 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

3 valid minerals.

Detailed Mineral List:

Formula: Fe2O3
Reference: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163.
Hematite var: Specularite
Formula: Fe2O3
Reference: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163.
Formula: (Fe,O,OH,H2O)
Reference: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163.
Formula: KAl2(AlSi3O10)(OH)2
Reference: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Wilson, E.D., et al 1934), AZ Bur. Mines Bull. 137: 163.
Formula: FeS2
Reference: MRDS file #10027591.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
var: Specularite4.CB.05Fe2O3
Group 9 - Silicates
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Unclassified Minerals, Rocks, etc.
var: Specularite
var: Sericite

List of minerals for each chemical element

H Limonite(Fe,O,OH,H2O)
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O HematiteFe2O3
O Limonite(Fe,O,OH,H2O)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O Hematite (var: Specularite)Fe2O3
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
S PyriteFeS2
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe Hematite (var: Specularite)Fe2O3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Quaternary - Miocene
0 - 23.03 Ma

ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

1600 - 1800 Ma

ID: 2748537
Early Proterozoic metamorphic rocks

Age: Statherian (1600 - 1800 Ma)

Description: Undivided metasedimentary, metavolcanic, and gneissic rocks. (1600-1800 Ma)

Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.

Lithology: Major:{metasedimentary,metavolcanic,gneiss}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

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