Sweet Water Mine

Not in Schrader

Plan from Mineral Appraisal¹

Alternate Names

Last Chance, Lonesome One, Jewell

Company

Vargas⁵.

Mining District and Mines

Greaterville District

Location

NE¼ 10
20 S, 15 E.¹

Mineral Products

Historical: 1962 - shipped one car load. Forest Service Examination (1965) - Two samples from adit on Sweet Water B and Lonesome One claims (adit shown on plan above) assayed: Ag 0.8 - 2.7 oz./t., Au trace and nill, Cu 0.7% - 3.5%, Pb trace. Two samples taken across shear at portal of an inaccessible adit on Last Chance A assayed: Ag 6.0 - 8.0 oz./t, Au tract, Cu 0.9% - 2.3%; Pb trace. 1963 - shipped some 90 tons of ore averaging about 1.5% Cu and 0.8oz./t Ag.

USBM: Ag 2.6 - 44.8 ppm, Au all <64 ppb, Cu 587 - >10,000 ppm, Pb 195 - 872 ppm, Sb 44.3 - 900 ppm, Zn 550 - 3,200 ppm¹

Geology

Adesitic (?) dike intruded volcanic breccia, and both have been faulted and sheared. The rocks have been heavily silicified and contain chalcopyrite, azurite, and malachite.¹

Type of Operation and Production

Historical: Two adits, one inaccessible and the other 116 feet long with 46 feet of drifts and a 21 foot raise to the surface.

USBM: Adit 120 ft. long, with 40 ft. of drifts and 20ft. deep connecting shaft. Area where inaccessible adit was located had been bulldozed and partly reclaimed.¹

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 Stanton B. Keith, bulletin 1991, Arizona Geological Survey, 1975
6. WesternMiningHistory.com
7. https://www.gvrhc.org/Library/LuckyLedgeMine.pdf