Mine Descriptions

Hancock Mine


Mining District and Mines

Greaterville District

USBM: Historical: Worked in 1885, shipped a small amount of high grade Pb - Ag ore; 1

Location

SE¼. sec. 14, T. 19 S., R. 15 E.1

31.78152N, -110.77512W1

Mineral Products

USBM: samples 138. Ag 270 ppm, Au 260 ppb, Bi 222 ppm, Cr 800 ppm, Cu 1,150 ppm, Pb 9220 ppm, Zn 630 ppm1.

Geology

Quartz vein cutting granite. Vein is vuggy and contains pyrite, galena, limonite, and haematite 1.

Type of Operation and Production

Shaft 100 ft. deep. USBM: shaft flooded at 15 ft. depth.3


References

  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. mindat.org
  4. USGS Mineral Resources Data System - possibly using NAD72 (https://mrdata.usgs.gov/mrds/map-commodity.html#home)