Latitude: 31°42'4"N
Longitude: 110°53'28"W
‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 183-184.
University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 58.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 393.
USGS Mt Wrightson Quadrangle topo map.
U.S. Bureau of Mines field notes, CU50.
MRDS database Dep. ID file #10161764, MAS ID #0040230386.
A former underground Cu-Zn-Ag-Pb mine located in the SE¼SE¼ sec. 10, T20S, R14E, in the upper part of Agua Caliente Canyon at an elevation of about 6,650 feet, on National Forest land. It was discovered in 1899 and is owned by the Santa Rita Mining Co., of Tucson (1970).
Mineralization involves a fault fissure which strikes N.75ºE. and stands about vertical in altered porphyritic diorite which is intruded by granite porphyry on the SE. The diorite is fine-grained and consists of andesine, hornblende, and orthoclase, with a little quartz, biotite, and magnetite. Next to the fault it contains phenocrysts of hornblnde ¾ of an inch in maximum length.
The fissure filling consists principally of about 4 feet of hard sheared and altered diorite and quartz. It is separated from the walls by a thin selvage. The ore contains sulphides with quartz and some calcite. It occurs principally as pockets or stringers in the selvage and is only sparingly disseminated in the main filling. Some of it is reported to average 18% Cu and 100 oz. Ag/T and $20 Au/T (period values).
Workings include a shaft and 2 tunnels separated by 80 feet vertically. The tunnels are driven eastward in a ridge that separates the head forks of Agua Caliente Canyon. The lower tunnel is 135 feet long, and from it a 30 foot long crosscut has been driven to the south. The shaft is 100 feet deep and is located 100 feet above the upper tunnel, which is 80 feet long and caved.
Mineral List
7 entries listed. 6 valid minerals.
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