‡Ref.: Davis, R.E. (1955), Geology of the Mary G Mine area, Pima County, Arizona, University of Arizona Masters of Science thesis.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 114 (Table 4).
Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.
Arizona Bureau of Mines file data.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 175, 233.
MRDS database Dep. ID file #10048097, MRDS ID #M800085; and, Dep. ID #10113512, MAS ID #0040190311.
A former small underground Ag-Au-Pb-Cu-Zn-Hg mine located in East-central sec. 21, T.20S., R.10E, 100 yards from the eastern edge of section 21 and 3 miles of Cerro Colorado Peak. Operated 1890-1950. This mine was open 1928-1950, with the exception of 1931, 1933, 1936, 1938, 1939, & 1945. Discovered 1890 by Clark. Owned by H.G. Worsley. Operated at times, or in part, by the Mary Leasing Co.; Ayers; Goodsill & Carry Brothers; Workman; Worsley; Bledsoe; Turner; Mary G. Mining Co.; and, L.A. Roberts (1949-1950); the Battle Ax Mining Co. (1986); and the Acme Mining & Devedlopment (1951).
Mineralization is a vein deposit with irregular, lensing, drusy, and milky, partly oxidized quartz veins containing stringers and veinlets of sulfides, copper carbonates and mercurian tetrahedrite with minor barite and calcite along a fault zone in Laramide (?) propylitized andesite porphyry. Ore depth to bottom is 41.15 meters. Ore control was veins adjacent to fault intersections, NE-trending main fault at N10E, dipping 45W. Alteration includes partial ozidation, propylitic, and drusy quartz. Cinnabar is present as specks. The ore shoot was controlled by fault intersection. Faults cutting the main fault include N40E and N60W and have a northerly dip. Geologically similar to the Cerro Colorado Mine.
Workings include a shaft(s). A surface drilling project and pilot mill test were conducted. Operated intermittently from the late 1880's to 1950, producing some 800 tons of ore averaging about 60 oz. Ag/T, 1.5% Pb, 0.7% Cu and minor Au & Zn.
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Map Reference: 31°40'21"N , 111°18'57"W
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Mineral List:12 entries listed. 10 valid minerals.
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