Black Princess Mine

Trash-filled Main shaft, 2026-02-21

Subsidiary shaft, 2026-02-21

Mining District and Mines

Cerro Colorado District

USBM:

Location

20S 10E SE¼ 14, 31.68263N, 111.28263W⁷

31.6825N, 111.2825W (main shaft)⁸

31.6826N, 111.2826W (subsidiary shaft)⁸

Mineral Products⁷

Ag, Au, Pb, Cu-

Ownership⁷

Owner Name: Udall.

Type of Operation and Production⁷

Shallow shaft and surface operations. Worked sporadically from early 1800’s to 1939. Some 100 tons of ore produced, averaging about 29 oz. Ag/T, 0.2 oz. Au/T with minor lead and copper

Geology⁷

Spotty anglesite, cerussite, argentiferous galena and minor copper carbonates in an oxidized and supergene enriched quartz fissure zone in Cretaceous andesite porphyry.

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).
8. Mike Bertram 2026-02-21