Latitude: 31°50'56"N
Longitude: 111°8'48"W
Ref.: Cooper, J.R. (1960) Some geologic features of the Pima mining district, Pima County, Arizona: U.S. Geological Survey Bulletin 1112-C, p. 63-103, 1 sheet, scale 1:31,680.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 135 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 12 (Table 1).
USGS Twin Buttes Quadrangle topo map.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10026760, MRDS ID #M000104; and, Dep. ID #10210555, MAS ID #0040190251.
A former small underground Pb-Zn-Cu-Ag-Au mine located in East-central sec. 19 & West-central sec. 20, T.18S., R.12E. (Twin Buttes 15 minute topo map), 6½ miles SW of Twin Buttes on private land. Produced 1931-1954. Owned at times, or in part, by Costello; Paly & Anderson; Amargosa Molybdenum & Copper Co.; and, Wilson.
Mineralization is spotty and irregular, partly oxidized lead, zinc and copper minerals in quartz shear veins cutting Laramide volcanics and diorite intrusive. The volcanics consist of andesite tuffs, breccia flows and some conglomerates.
Workings include shaft operations. Worked intermittently from 1921 to 1956, of some 170 tons of ore averaging about 4% Pb, 3% Zn, 2% Cu, 3 oz. Ag/T and 0.07 oz. Au/T.
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