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Old Yuma Mine (Yuma Mine), Saguaro National Monument, Amole District, Tucson Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 32° 18' 53'' North , 111° 7' 16'' West
Latitude & Longitude (decimal): 32.3147222222, -111.121111111
Other regions containing this locality:Sonoran Desert, North America
North America

Ref.: Guild, F.N. (1910), The Mineralogy of Arizona, The Chemical Publishing Co., Easton, PA.

Guild, F.N. (1911), Mineralogische Notizen, Zeit. Krystal. und Mineral.: 49: 321-331.

University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 59, 61.

Guild, F.N. (1917), A microscopic study of the silver ores and their associated minerals, Economic Geology: 12: 297-353.

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, 16-17, Plate I.

Newhouse, W.H. (1934), The source of vanadium, molybdenum, tungsten and chromium in oxidized lead deposits, American Mineralogist: 19: 209-220.

Frondel, C. (1935), Catalog of mineral pseudomorphs in the American Museum, Bull. American Museum of Natural History: 67.

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 70, 73, 80.

Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, Arizona Geological Society Digest: 3: 53-56.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 102 (Table 4).

Jones, D. (1983). "Famous mineral localities: the Old Yuma mine." Mineralogical Record: 14(2): 95-107, 326.

Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.

Rocks & Minerals (1988): 63: 310 & 328.

Rocks & Minerals (1989): 64: 58.

Rocks & Minerals (1990): 65: 23.

Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 158, 201, 225, 229, 307, 331, 410, 420, 426.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10103758, MRDS ID #M050625; and, Dep. ID #10234968, MAS ID #0040190345.

A former small surface and underground Pb-Cu-Zn-Mo-Ag-Au (V) mine located in the center of sec. 9, T.13S., R.12E, 1 mile ENE of the Tucson Mountain Park. Owned/operated, in whole or in part, by Col. Randolph; the International Ore Separation Co.; Reilly Mines Co.; Consolidated Mining And Milling (1986); and the Tucson Ore Milling Co.

Mineralization is lens-shaped ore masses with partly oxidized base metal sulfides with spotty wulfenite and vanadinite, and quartz and calcite gangue, in a steeply-dipping, lensing, and faulted orebody along a fracture zone cutting Cretaceous andesite and associated with a Laramide porphyritic intrusive. The ore zone is 5 meters wide, strikes N60E and dips 40S. Ore concentration was supergene enrichment. Alteration includes argillitic.

Workings include a shaft and underground workings to at least the 300 foot (95 meter) level. A later open cut exposed underground stopes; numerous shafts, pits. The development of underground workings and heap leach facility occurred in 1984-1986. This mine produced sporadically from 1916 through 1947, with a total of some 5,700 tons of ore averaging about 4% Pb, 1% Cu, 0.6% Zn, 0.3% Mo, 1 oz. Ag/T and 0.1 oz. Au/T. ($3/t Au - period values). Average mine ore contained 2-3% wulfenite.

Mineral List

17 valid minerals.

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