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Anaconda Mine group, Temporal Gulch, Wrightson District, Santa Rita Mts, Santa Cruz Co., Arizona, USA
‡Ref.: Engineering & Mining Journal (Jan 15, 1910).Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 233-237.
Rohrbacker, R.T. (1964) Geology of the Temporal Gulch-Mansfield Canyon area, Santa Cruz County, Arizona: Tucson, University of Arizona, M.S. thesis, 81 p.
Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 15.
Galbraith, F.W. & Brennan (1959), Minerals of Arizona: 42.
Arizona Bureau of Mines file data.
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 88 (Table 4).
A Pb-Ag-Cu-Zn-Au mine group located in the NW ¼, South-central & SW ¼ sec. 3 & the North-central & NE ¼ sec. 10, T.21S., R.15E., on 54 claims occupying a mineralized belt ¾ mile wide. The belt extends from the Mansfield Camp northward on each side of Temporal Gulch for about 2 miles. The Anaconda Camp is near the center of the belt, about 7 miles north of Patagonia. Some of the veins occurring in this belt were worked as early as 1873. Owned at times, or in part, by Parks; the Anaconda-Arizona Mining Co., Kansas City, MO (circa 1905-1915); Altamirano; and the Boulder Mining Co.
The topography is mostly rough, but in most of its course through the belt Temporal Gulch widens into an open valley or basin.
The country rock is highly altered whitish older andesite. It is in part tuffaceous and is intruded by dikes and masses of a younger black andesite.
The country rock is cut by a system of quartz veins which strike about N.60ºW. and usually dip steeply either to the north or to the south. The veins, as plainly shown by their mineralized croppings, are numerous. They are spaced from about 200 to 300 feet apart. any of them are small, but about 40 by estimate are of workable size. They range from 6 inches (15 cm) to 6 feet in width. As shown by the croppings and the exposures in the workings, the continuity of any one vein is interrupted to an unusual degree, so that along the course and depth of its fissure the vein may consist of a series of tabular sheets or relatively flat lenses.
The veins differ from one another in their economic content. Most of them carry chiefly copper minerals, commonly chalcocite containing silver. In some the principal ore mineral is argentiferous galena.
Mineralization is lensing quartz-fissure veins containing calcite and barite, and with shoots, stringers, and seams of argentiferous galena and other sulfides and sulfosalts. Veins are often vuggy with mineralization banded or lining vugs. The wall rock is Triassic rhyolite and latite volcanics.
Workings are tunnel and shaft operations. This group was worked from the early 1870's and intermittently through 1949. It produced some 300 tons of ore averaging about 5% Pb, 30 oz. Ag/T, 3% Cu, and minor Au.
Mineral List
Mineral list contains entries from the region specified including sub-localities24 entries listed. 15 valid minerals.
Localities in this Region
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