Mine Descriptions

Mansfield Mine group


Wrightson Mining district

Alternate Names

Sweet, Black Cap, Ruby, Rupert, Lee.

Company

Mansfield & Ryan, Gunsight Mg. Co., Powers, Mansfiled Mg. & Smltg. Co., Pierce, Laycock. Bradsher.

Location

?

Mineral Products

Pb, Ag, Cu, Zn, Au

Type of Operations

Tunnel and shaft operations. Worked intermittently from 1879 through 1951, producting some 370 tons of ore averaging about 19% Pb, 22 oz. Ag/T, 2% Cu and 0.1 oz. Au/T.5

Geology

Cluster of roughly parallel quartz-fissure veins containing pyrite, argentiferous galena, sphalerite, tetrahedite, chalcopyrite, bornite, in a quartz, calcite, barite and manganese gangue. Wall rocks are strongly altered Triassic dacitic and latitic flows and Cretaeous andesite breccia intruded by Laramide quartz latite dikes, stocks, sills, and breccia.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