Latitude: 32°34'35"N
Longitude: 110°20'12"W
A former surface and underground Au-Ag mine located on 3 unpatented claims (1965), in sec. 7, T10S, R20E, 1 mile South of the Powers Mine and 6.5 miles E of the Pinal-Graham County line on land of mixed status. Owned and operated by E. Knothe, R.C. Roberts (1934).
Mineralization is a tabular ore body 0.91 meters wide, hosted in rhyolite. The rhyolite is intruded by dikes of andesite porphyry. The deposit occurs within a silicified, brecciated zone, up to about 3 feet (1 meter) wide that strikes SE-ward and dips steeply NE-ward. Richest portion generally less than 1 foot wide and occurs near the hanging wall. An associated rock unit is andesite.
Workings include several open cuts, a 40 foot (12.19 meters) deep shaft with a drift 30 feet N and a stub 20 feet long to the south from the bottom of the shaft. Production years of record: 1923-1928, 1933-1935.
The ore consists of silicified, brecciated rhyolite, cemented & partly replaced by sugary, grayish-white quartz and traversed by irregular veinlets of finely crystalline white quartz.
References
Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 194.
Creasey, S.C. et al (1981) Mineral Resources of the Galiuro Wilderness and Contiguous Planning Areas, Arizona. USGS Bull. 1490, 94 pp.
Brown, S.D. (1993) Mineral Appraisal of the Coronado National Forest, part 4, Galiuro Mountains Unit, Graham County, Arizona, U.S. Bureau of Mines Open File Report MLA 26-93, 40 pp.
USGS Basset Peak Quadrangle map.
Arizona Department of Mineral Resources Long Tom Mine file.
Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).
MRDS database Dep. ID #10027018, MRDS ID #M001726; and Dep. ID #10234503, MAS ID #0040090195.
Mineral List
2 entries listed. 1 valid mineral.
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