Latitude: 33°47'27"N
Longitude: 110°30'14"W
A former underground asbestos mine located in sec. 35, T5N, R17E, about ½ mile (0.8 km) E. of the southern extremity of Mule Hoof Bend, and about ¾ mile SW of the highway 60-77 bridge, 400 feet W of the highway, at 4,400 feet of altitude. Discovered in 1921 by George P. Bartlett, John C. Bartlett, Andrew J. Dunaway, and John B. Cobb.
Mineralization is an asbestos-bearing serpentine band 1½ to 2 feet (0.5 to 0.6 meters) thick in the Mescal Limestone. It strikes N50E and dips 35NW. A concordant diabase sill is about 9 feet below this zone. The best asbestos appears to be limited to an elongate zone 40 to 50 feet wide trending NE.
Area structures include several small scale thrusts of northwest trend and southwest dip, which are exposed in the underground workings. Movement on these thrusts amounts to only a few inches.
Workings include an 80 foot long adit with 2 left-hand branches at 35 feet and 40 feet, plus several cuts, totalling 22.86 meters in length and 24.38 meters in depth. No production record.
Assay data: The asbestos fiber averages between 1.5 and 2.5 inches in aggregate; fiber is semi-harsh.
References
Stewart, L.A. (1955), Chrysotile-Asbestos Deposits of Arizona, U.S. Bureau of Mines Information Circular 7706: 62-63.
Bromfield, C.S. & Shride (1956), Mineral resources of the San Carlos Indian Reservation, Arizona, USGS Bull. 1027-N: 617, 658-660.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
MRDS database Dep. ID #10027440, MRDS ID #M003093; and Dep. ID #10185659, MAS ID #0040070081.
Mineral List
2 entries listed. 1 valid mineral.
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