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Franco Riqueza claims, Silver Bell District, Silver Bell Mts, Pima Co., Arizona, USA

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Ref.: Watson, B.N. (1964) Structure and petrology of the eastern portion of the Silver Bell Mountains, Pima County, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 168 p.

Banks, N.G. (1975) Field Examination (Franco Riqueza claims).

MRDS database Dep. ID file #10109625, MRDS ID #M051099.

A former small Pb-Zn mine/group of claims located in sec. 23, T11S, R8E.

Mineralization is ore along fractures in granodiorite porphyry. Galena, sphalerite, chalcopyrite, and pyrite sulfides were observed in dump material. Much pyrite-limonite on surface with moderate to heavy propylitic alteration.

Workings include shafts, winzes, drifts, prospect pits, short adits, and crosscuts. Group of 2 major adits, several minor adits + prospects. The deepest adit is 300 feet (91.44 meters) long. 2 carloads of ore were shipped.

Mineral List

5 entries listed. 4 valid minerals.

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