Cottonwood Mine (Apache Pass District), Dos Cabezas (Two Heads) District, Dos Cabezas Mts, Cochise Co., Arizona, USA

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‡Ref.: Cooper, J.R. (1960) Reconnaissance map of the Willcox, Fisher Hills, Cochise, and Dos Cabezas quadrangles, Cochise and Graham Counties, Arizona: U.S. Geological Survey Mineral Investigations Field Studies Map MF-231, 1 sheet, scale 1:62,500.

Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 60 (Table 4).

Drewes, Harold, USGS unpublished data, 1977-1980.

Drewes, Harold, et al (1988), Volcanic Structural Controls of Mineralization in the Dos Cabezas Mountains, Southeastern Arizona, USGS Bull. 1676: 21 (Figure 6), 23 (Table 2).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 398.

MRDS database Dep. ID file #10026953, MRDS ID #M001272; and, Dep. ID #10234164, MAS ID #0040030125.

A former small underground Au-Ag-Pb mine located in the SE¼ sec. 6, T. 15S., R. 28E about 6 air miles E of Dos Cabezas, AZ, on private land. Owned at times, or in part, by the Cottonwood Mining Co. and the Western Mining Co.

Mineralization consists of spotty gold and galena in quartz-filled fissure veins in Precambrian granitic rocks, near a rhyolite dike. The vein is 1,371.6 meters long, strikes N-S and dips 32E. Host rock units include quartz monzonite, andesite and granite. Associated rock units include rhyolite.

Workings include shafts and are 365.76 meters long and 121.92 meters deep. One main shaft and a smaller shaft down to the 56 foot level. Workings at the 56, 113, 180, and 280 foot levels. Some 500 or more tons of gold ore were produced from the 1880's to 1934.

Mineral List

Galena var: Argentiferous Galena

Pyrite

2 entries listed. 1 valid mineral.