Latitude: 31°37'52"N
Longitude: 110°48'14"W
‡Ref.: Engineering & Mining Journal (Jan 15, 1910).
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 234-235.
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.
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 88 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10113549, MAS ID #0040230167.
A former underground Pb-Ag-Cu-Zn-Au mine located in the N½N½N½ sec. 10, T21S, R15E, 1/8 mile south of the Ultimo prospect, on National Forest land. Owned at times, or in part, by Parks; Anaconda-Arizona Mining Co.; Altamirano; and the Boulder Mining Co. The locality of double header shafts on the USGS (1981) 7.5 minute Mt. Wrightson Quadrangle is incorrect. Actual locality is 1200-1300 feet ESE, where a single shaft is shown.
Mineralization is an east-west lensing quartz-fissure vein in white silicified rock which seems to be rhyolite tuff and is probably intrusive into the andesite. This rock contains a little disseminated pyrite. The dip of the vein flattens from about 60º near the surface to 30º in the lower part of the shaft. A thin, black, clayey gouge separates the vein from the rock wall, especially on the hanging wall side. The vein is composed mainly of the brecciated siliceous rock in which the ore occurs in lenses that are generally connected by seams of barite. The lenses contain mainly quartz, barite, and sulphides-sulphosalts. They are usually banded, with the sulphides mostly in the outer portion and barite in the inner or middle portion. Quartz is sparingly present and is well crystallized in comb structure at right angles to the wall.
Workings include a 100 foot deep inclined shaft.
Mineral List
5 entries listed. 5 valid minerals.
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