‡Ref.: Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 62-63.
Parker, F.Z. (1966) The Geology and Mineral Deposits of the Silver District Trigo Mountains, Yuma County, Arizona. Masters Thesis, San Diego State College: 131-132.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 178 (Table 4).
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
Rocks & Minerals (1988): 63: 328.
Bancroft, P. & G. Bricker (1990), Arizona's silver mining district, Mineralogical Record: 21: 151-168.
Arizona Bureau of Mines file data. 64: 58.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 100, 128, 169, 223, 398, 419, 420, 425.
MRDS database Dep. ID file #10027195, MRDS ID #M002440; and, Dep. ID #10113762, MAS ID #0040120420.
A former surface and underground Pb-Ag-Zn-Fe-Mn-Be-Sr-Baryte mine located in the SW¼ sec. 36, T3S, R23W, about 1½ miles NE of the red Cloud Mine, on BLM-administered land. Owned at times, or in part, by Pryor; Neal Mining Co. (1933); and the Yuma Metals, Inc.
Mineralization is irregular fissure and massive cavity fillings of argentiferous lead and zinc carbonates with a gangue of iron oxides, manganese oxides, barite, celestine, manganiferous calcite, quartz, and gypsum along a fault zone separating Tertiary dacitic and andesitic lavas, rhyolite tuffs and lapilli tuffs on the West from Laramide contact metamorphosed intrusive and granitized rock and schist on the East. The main fault strikes N.20ºW. and dips 60ºSW, and is joined near the center of the claim by a branch fault that strikes N.10ºW. These faults contain veins of similar character but the main one is wider, longer & more strongly mineralized. It is traceable for 2,000 feet (609.6 meters) southward and it is a few feet from the schist and granite in tuff & breccia which show considerable chloritization & carbonitization. The richer portion of the vein, which is some 300 feet long and from a few inches to 1½ feet (0.5 meters) wide, occurs near the hanging wall of the wider portions of the vein.
Workings include an 86 foot (26.2 meters) deep vertical shaft with a 45 foot crosscut, several short tunnels, trench and several pit operations. This mine was developed from the early days but probably did not produce much more than 6 - 10 tons of ore averaging about 48% Pb and 67 oz. Ag/T, mostly in 1919-1920 from shallow workings.
A visit to this mine in recent years revealed a shaft, a trench cut through the thickness of the vein, about 40 - 50 feet, to the footwall, and a tunnel connecting the trench cut to the shaft. The vein material is very pockety with tiny wulfenite crystals, sprays of acicular, colorless willemite crystals, small, sceptered, water-clear quartz crystals and other species in the cavities. Much of the vein material is contaminated with abundant ocherous, adherent iron and manganese oxides of a dark red to blackish color. Observations by C. Lemanski, Jr.
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Map Reference: 33°6'59"N , 114°35'11"W
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Mineral List:22 entries listed. 18 valid minerals.
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