Latitude: 31°22'9"N
Longitude: 110°41'38"W
A former small surface and underground Zn-Pb-Cu-Ag-Au mine located one patented claim in East-central (SE¼SW¼SE¼) sec. 3, T23S, R16E (protracted), about 1.0 mile S of Washington Camp, on private land. Also located adjacent on the NW to the Empire Mine and on the NE to the Belmont Mine. Discovered 1875. Produced 1955-1957. Owned at times, or in part, by the Duquesne Mining & Reduction Co.; Nash Mines; and, Mr. Alberto De la Ossa (1957).
Mineralization is small, spotty, and irregular lenses of sulfides in pyrometasomatized Permian Naco Group limestone, partly oxidized near the surface with supergene enrichment in silver. The host rock unit is the Colina Limestone. Ore concentration was partial oxidation near surface.
Local structures include nearby granodiorite intrusions. Tectonic elements include the Duquesne Fault Block.
Mineral deposits of the Washington-Duquesne area occupy a limestone-sediment belt (2.5 miles long by 1.25 miles wide) surrounded by igneous rocks which also form detached masses and dikes within the belt.
Workings include tunnel, open cut, and shaft operations. Developments included an 80 foot inclined shaft, stoped at the 80 foot level. Worked sporadically by lessees, mainly in the 1950's. Produced some 800 tons of ore averaging about 7% Zn, 6% Pb, 2% Cu, and 6 oz. Ag/T.
References
Crosby, W.O. (1906) The limestone-granite contact deposits of Washington Camp, Arizona: American Institute of Mining Engineers, Transactions: 36: 626-646.
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.
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 79 (Table 4).
Lehman, Norman E. (1978) The Geology and Pyrometasomatic Ore Deposits of the Washington Camp-Duquesne District, Santa Cruz County, Arizona. PhD dissertation, University of Arizona: 126-143.
U.S. Bureau of Mines - Arizona Bureau of Geology and Mineral Technology file data.
U.S. Bureau of Land Management Mining District Sheet #727.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10046340, MRDS ID #M241347; and, Dep. ID #10113683, MAS ID #0040230277.
Mineral List
5 entries listed. 4 valid minerals.
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