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Horseshoe Basin occurrence (Ballam occurrence), Quijotoa District, Quijotoa Mts, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USA

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Ref.: Harrer, C.M. (1964), Reconnaissance of Iron Resources in Arizona, US Bureau of Mines Information Circular 8236: 82.

USGS Quijotoa Mountains Quadrangle topo map.

MRDS database Dep. ID file #10026748, MRDS ID #M000061; and, Dep. ID #10258927, MAS ID #0040190496.

An Fe-Ti-Cu-Au occurrence located in sec. 14, T15S, R2E at Quijotoa, 3 miles SW of the Quijotoa Trading Post.

Mineralization is a replacement deposit with ore in intermittent bands. The bands were found in a zone of highly epidotized granite, ranging from 100 to 300 feet wide. Individual bands of magnetite and hematite are 4 to 30 feet thick. Extensive magnetite sand placer deposits containing gold are present in the desert floor.

The ore body is 4,827.9 meters long, 91.44 meters wide and 152.4 meters deep. It strikes N30W and dips 75NE. Then host rock is epidotized granite.

Mineral List

3 entries listed. 3 valid minerals.

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