Mindat Logo

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

Latitude: 31°50'20"N
Longitude: 110°45'46"W
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.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
This page is currently not sponsored. To sponsor this page click here.

Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: December 18, 2014 10:33:12 Page generated: June 15, 2011 00:25:33
Mineral and Locality Search
and/or Locality:
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds