Arizona Consolidated Mine (Uncle Sam Mine; Josephine Mine), Saguaro National Monument, Amole District, Tucson Mts, Pima Co., Arizona, USA
|Latitude & Longitude (WGS84):||32° 18' 47'' North , 111° 8' 54'' West|
|Latitude & Longitude (decimal):||32.31306,-111.14833|
|Other regions containing this locality:||Sonoran Desert, North America|
‡Ref.: Jenkins, O.P., and Wilson, E.D. (1920) A geological reconnaissance of the Tucson and Amole Mountains, with Notes on the southern section of the Amole mining district, by M.A. Allen: Arizona Bureau of Mines Bulletin No. 106, 29 p.: 6 (Pl 1).
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 83 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 11 (Table 1).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10108980, MRDS ID #M001018; and, Dep. ID #10210562, MAS ID #0040190102.
A former small underground Cu-Ag-Au mine group located in the North-central sec. 7, the West ½ sec. 8, & the NW ¼ sec. 17, T.13S., R.12E. (Avra 7.5 minute topo map), 11 miles NW of Tucson on National Park land. Operated 1901-1905. Owned at times, or in part, by the Arizona Consolidated Mining Co.; and the Arizona Copper Mining Co.
Mineralization is spotty copper carbonates, oxides, silicates, and sulfides along strongly altered shear zones and fractures in chloritized and silicified Cretaceous andesite and in blocks of dolomite cut by porphyry dikes.
Workings include relatively shallow shafts and tunnels. Intermittent production occurred in the early 1900's. It amounted to some 1,000 tons of ore averaging about 0.7% Cu, 2.6 oz. Au/T and a trace of gold. Probably shipped as smelter flux.
The mines that make up this group have separate crib records, but names were not given to the records due to the lack of information. These other records are field examinations by Roger Ashley in 1974, they are listed here by record numbers: M050870, M050871, M050843, M050899, M050900, and M051017.
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 Macrostrat.org
|Ypresian - Campanian|
47.8 - 83.6 Ma
|Early Tertiary to Late Cretaceous volcanic rocks|
Age: Phanerozoic (47.8 - 83.6 Ma)
Stratigraphic Name: Williamson Canyon Volcanics
Description: Rhyolite to andesite and closely associated sedimentary and near-surface intrusive rocks; commonly dark gray to dark greenish gray or greenish brown. In the ranges west of Tucson, this unit includes thick welded ash-flow tuffs. Volcanic rocks of this unit are inferred to be derived from vents and volcanoes above magma chambers that solidified to form the granitic rocks of map unit TKg. These rocks are restricted to southeastern Arizona except for a small outcrop near Bagdad. (50-82 Ma)
Comments: Related, broadly, to unit TKg
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.