Extension Mine

A former underground Pb-Cu-Ag mine/prospect located to the east of the Glove Mine in Cottonwood Canyon on National Forest land. ¹⁰.

Ownership

Owned and operated by Mr. Henry Worsley and Mr. Otho Kinsley (1960)¹⁰

Location

31.66342,-110.93515¹⁰

center W½ sec. 29, T20S, R14E.¹⁰

Mineral Products

Pb, Cu, Ag¹⁰

3/26/69

Photos

View of mine from the north

Loading platform

Loading platform 2

Loading platform 3

Shaft

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. http://docs.azgs.az.gov/OnlineAccessMineFiles/C-F/ExtensionSantacruz11b.pdf
4. USGS Mineral Resources Data System - possibly using NAD72 (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
6. Geology of the Three R Mine, Palmetto Mining District, Santa Cruz County, Arizona by Paul Handverger, MS thesis 1963, University of Arizona
7. https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10046338
8. Wikipedia
9. https://tucson.com/news/local/three-r-mine-contributed-to-arizonas-rep-for-copper-production/article_2a25e1e1-7280-5fd5-be97-a40732a39b1b.html
10. mindat.org