Unnamed corundum prospect, Sacaton Peak area, Sacaton Mts, Gila River Indian Reservation, Pinal Co., Arizona, USA

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A corundum prospect located in the SE¼ sec. 12, T5S, R5E (Phillips reports the township and range as 6S, 6E), about 1½ miles due W of Sacaton Peak.

Mineralization is a coarse-grained, locally iron-stained granite intruded by dikes of dioritic porphyry and hard, dense felsite. Crystalline corundum, and associated quartz and rutile, form irregular masses up to several inches in diameter, in the felsite dikes.

The future of production of abrasive quality corundum in Arizona is practically nil; however, specimens of gem (largely semi-precious) quality may still be found.

References

Wilson, E.D. (1963) Mineral Deposits of the Gila River Indian Reservation, Arizona. Arizona Bureau of Mines Open-File Report, 35 pp.

Larrabee, D.M. (1969), “Corundum”, in Arizona Bureau of Mines Bull. 180 (USGS Bull. 871): 336.

Wilson, E.D. (1969) Mineral Deposits of the Gila River Indian Reservation, Arizona. Arizona Bureau of Mines Bull. 179, 34 pp.

Moore, R.T. & R.J. Varga (1976), Maps showing nonmetallic mineral deposits in the Phoenix area, Arizona: USGS Misc. Investigations map I-845-J, 1:250,000.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file;

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 189, 359.

MRDS database Dep. ID #10095955, MRDS ID #TC10257.

Mineral List

Corundum

Rutile

2 entries listed. 2 valid minerals.