Mine Descriptions

Anaconda Mine group


Wrightson Mining district

Alternate Names

Double Header, Ultima, Copper Mountain or Armada, Philadelphia, Little Joker, St. Louis, Silver Cave.

Company

Anaconda-Arizona Mg. Co., Altamirano, Boulder Mg. Co.

Location

?

Mineral Products

Ag, Pb, Cu, Zn-, Au-

Type of Operations

Tunnel and shaft operations. Worked from early 1870's and intermttently through 1949, producting some 300 tons of ore averaging about 5% Pb, 30 oz. Ag/T, 3% Cu and minor Au.5

Geology

Lensing 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.5


  1. Mineral Appraisal of Coronado National Forest, Part 12, Santa Rita Mountains Unit, MLA11-94 (1994). SR 591-609
    http://repository.azgs.az.gov/sites/default/files/dlio/files/nid1813/usbm_mla_011-94.pdf
  2. Mining in the Santa Rita and Patagonia Mountains of Arizona, U.S. Department of Interior, 1915. Republished 2014 by Kerby Jackson.
  3. Mike Bertram,
  4. USGS Mineral Resources Data System - using WGS84 (https://mrdata.usgs.gov/mrds/map-commodity.html#home)
  5. Index of Mining Properties in Santa Cruz County by Staton B. Keith, bulletin 1991, Arizona Geological Survey, 1975