Falls claim, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA

• Display
  • Standard
  • Detailed
  • By Strunz Category
  • By Dana Category
• Photos
  • Add Photo
• Maps
  • Map Pages
  • Nearest Localities
• Search
  • Mineral Search
  • Search Google
  • Link to USGS

Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 125 (Table 4).

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 12 (Table 1).

USGS Sahuarita Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10026769, MRDS ID #M000172; and, Dep. ID #10186708, MAS ID #0040190223.

A former small underground Cu-Ag mine/claim located in the center (NW¼SE¼) of sec. 25, T.18S., R.15E. (Sahuarita 15 minute topo map), 2 miles SE of Helvetia. Produced 1958-1959. Owned by the Lewisohn Copper Co. (1959); owned and operated by ASARCO (1988-1994 and beyond). The Falls patented claim is part of the Helvetia property owned by ASARCO (1992).

Mineralization is copper carbonates and sulfide in irregular pyrometasomatic lenses in thrust-faulted segments of silicated Paleozoic limestone, cut by cross-faulting.

Workings include a shallow shaft and tunnel. Some 170 tons of ore averaging about 5% Cu and 0.3 oz. Ag/T were produced in 1958-1959.

Mineral List

No entries listed.