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St. Louis Prospect, Wrightson district | |
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The claim of the St. Louis prospect adjoins that of the Philadelphia prospect on the north. The principal openings, consisting of short tunnels and shafts, are in the side and bottom of a canyon-like gulch, on a 4 foot vein which dips 80° S. It is said that John Parks in 1882 shipped from the prospect 20 sacks of silver-copper ore which netted $300 to the ton. The vein is composed mostly of chrushed or brecciated reddish andesite cemented by quartz. On the hanging or south wallit carries a 9 inch pat streak of ore which consists mainly of quartz, barite, limonite, galena, gray copper, chalcopyrite, pyrite, and sphalerite, the whole being more or less stained with malachite, azurite, and cerusite. It is said that 2 tons of this ore shipped to the Copper Queen smelter, at Douglas, AZ, gave returns of 5.75% in copper and 96 ounces to the ton in silver. The mine is part of the Anaconda group. Alternate NamesNone CompanyJohn Parks, Anaconda-Arizona Mg. Co., Altamirano, Boulder Mg. Co.5 Mining DistrictWrightson District Location21S 15E, NW¼ Cen. S., Cen. & SW¼ 3 N. Cen. & NE¼ 105 Mineral ProductsAg, Pb, Cu, Zn-, Au- 5 GeologyLensing quartz fissure veins containing calcite and barite, and with shoots, stringers, and seams of argentiferous galena, chalcopyrite, sphalerite, tetrahedrite and pyrite. Veins are often vuggy with mineralization banded or lining vugs. Wall rock is Triassic rhyolite and latite volcanics [Anaconda Group as a whole].5 Type of Operation and ProductionTunnel and shaft operations. Worked from early 1870s and intermittently through 1949, producing some 300 tons of ore averaging about 5% Pb, 30 oz. Ag/T, 3% Cu, and minor Au. [Anaconda Group as a whole]5 References
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