Vulcan Mines Group

Description

The Vulcan mine is 3½ miles north of Wise's ranch, 5 miles north north west of Salero, and a mile west of Josephine Canyon, in the foothills. It is on a prominent 40-foot silicified iron-bearing or ferruginous ledge, in intrusive diorite or andesite "porphyry," on or near its contact with the Paleozoic limestone, which dips to the south south west. The deposit contains, besides iron, some chalcopyrite and copper carbonates².

Company

Allen, Wingfield & Farrel².

Mining District and Mines

Tyndall District

Sample Locations¹

Arizona Geological Survey Mining data

http://docs.azgs.az.gov/OnlineAccessMineFiles/S-Z/VulcanminegroupSantacruz186b.pdf

Location

20S 14E SW¼ 28⁵

31.65903N, -110.92038W⁴

Mineral Products

Cu, Ag-.⁵

Geology

Copper carbonates and sparse chalcopyrite and pyrite as irregular replacements in engulfed exotic blocks of Paleozoic limestone and in ferruginous quartz-fissure veins in Cretaceous dacite volcanic breccia. Associated Tertiary quartz latite dikes.⁵

Type of Operation and Production

Adit operations. Worked in early 1900's and in 1954, producing some 650 tons of ore averaging 8% Cu and 1 oz. Ag/T.⁵.

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, F. C. Schrader, 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