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Mine Descriptions

Silver Shield Mine

AKA: Colorado Clark

Mining District and Mines

Cerro Colorado District

USBM:

Location

20S 10E NE¼ 35, 31.6512N, -111.2853W7

Mineral Products7

Ag, Pb, Au, Cu, Zn (Hg).

Ownership7

Owner Name: Falk, Mitchell

Type of Operation and Production7

Shallow shaft operation. Worked intermittently from 1880’s to early 1900’s, producing about 20 tons of high grade silver ore with minor base metals.

Geology7

Irregular, spotty and weak, oxidized, argentiferous base metal sulfides in a lensing quartz fissure vein in Cretaceous andesite porphyry.
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References

  1. Mineral Appraisal of Coronado National Forest, Part 12, Santa Rita Mountains Unit, MLA11-94 (1994). SR 591-609
    https://data.azgs.arizona.edu/api/v1/collections/BMRI-1552428987530-264/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)
  5. https://westernmininghistory.com/mine-detail/10162214/
  6. Index of Mining Properties in Santa Cruz county, Arizona; Stanton B. Keith, Arizona Geological Survey, Bulletin 191 (1975).
  7. Index of Mining Properties in Pima county, Arizona; Stanton B. Keith, Arizona Geological Survey, Bulletin 189 (1974).