Latitude: 31°35'33"N
Longitude: 111°20'27"W
‡Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 104 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10039620, MRDS ID #M050510; and, Dep. ID #10184054, MAS ID #0040190110.
A former small underground Au-Ag-Pb-Zn-Cu mine located in the center of sec. 8, T.21S., R.10E., 3 miles N of Arivaca. Produced 1932-1942. Owned at times, or in part, by the Backbone Mining Co.; and, Walsh. NOTE: Alternate coordinates provided: 31.6142N, 111.3411W.
Mineralization is irregular quartz-fissure lenses with spotty auriferous and argentiferous galena and othe sulfides in Laramide granitic intrusives. Near surface enrichment of gold and silver by oxidation and weathering.
Workings include a shaft(s) to a depth of 41.15 meters and length of 91.44 meters. Worked from the 1930's into the 1940's. Produced some 140 tons of ore averaging about 0.5 oz. Au/T, 0.8 oz. Ag/T, traces of Cu and 1% Pb. The zinc was not recovered.
Mineral List
3 entries listed. 2 valid minerals.
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