Latitude: 33°46'9"N
Longitude: 110°30'54"W
A former underground asbestos-W-Fe mine/deposit located in sec. 19, T4N, R18E, about a ½ mile W of highway 60, ¾ mile NW of Seneca, on Indian Reservation land.
Mineralization involves Mescal Limestone intruded by diabase. At or near the contact at least 3 thin lenses of magnetite, ranging from 100 to 400 feet (121,92 meters) long and from 2 to 3 feet (0.91 meters) thick, replace the limestone. The lenses parallel the bedding which strikes NW and dips from 5 to 10NE.
The principal workings are on the Accident claim. They include two tunnels on the lowest fiber zone and five tunnels on the upper, with some lateral stoping. Much of the production was limited to the Accident claim.
Assay data: Three zones contain the principal asbestos of the fiber-bearing horizon. The fiber of the lower varies in length from 4 inches to less than ¾ inch; and, as a rule, is of very excellent quality. The middle zone is usually less than 6 inches thick, but a large proportion of its fiber is of crude No. I and No. II length and quality. The fiber of the upper zone is slightly harsh at the surface, and, due to the presence of numerous, minute serpentine lenses throughout its veins, only a minor percentage of the material exposed is of crude No. I or No. II length.
References
Wilson, E.D. (1928) Asbestos Deposits of Arizona. Arizona Bureau of Mines Bull. 126: 58.
Bromfield, C.S. & A.F. Shride (1956), Mineral Resources of the San Carlos Indian Reservation, Arizona, USGS Bull. 1027-N: 637, 639.
Harrer, C.M. (1964), Reconnaissance of Iron Resources in Arizona, US Bureau of Mines Information Circular 8236: 54.
MRDS database Dep. ID #10027404, MRDS ID #M003035; and Dep. ID #10113018, MAS ID #0040070605.
Mineral List
3 entries listed. 3 valid minerals.
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