Silver Coin Mine (Quinn Mine; Silver Coin Extension Mine; Aravaipa Leasing Co. property; Verdun Mining Co. property), Klondyke, Santa Teresa Mts, Aravaipa District, Graham Co., Arizona, USA
Latitude: 32°50'14"N
Longitude: 110°16'41"W
A small former underground Pb-Cu-Mo-Ag-V-Au mine located in the NW¼SW¼ sec. 11, T7S, R20E, 3.1 miles east of Klondyke, on BLM-administered land. Small production reported in 1947. Operated by the Verdun Mining Co. of Arizona (1942).
Mineralization is a tabular ore body hosted in the Buford Canyon Volcanics, andesite or basalt flows and flow breccia; rhyolite dikes; Pinal Schist. The ore zone is 213.36 meters long, strikes N30W, and dips steeply E. An associated rock unit is diabase. Ore control was a fault between a biotite quartz latite plug and Buford Canyon Volcanics. Ore concentration was fissure filling. Alteration was thorough silicification. Along the adit level, most of the vein is low grade or barren except for streaks a few inches wide containing galena.
Area structures include block faulting trending NNW. Regional trends: minor Pre-Cretaceous E- and NE. A fault striking N70E may be a SW extension of Quartz Hill Fault.
Workings include a 105 foot deep shaft, an adit connecting with a level 40 feet below the shaft, a 180 foot tunnel with crosscuts and a 50 foot deep winze, a 200 foot (60.96 meters) deep shaft connects with the winze. Small lots of ore had been shipped up to 1925. An unknown tonnage was produced in 1947.
References
Ross, Clyde P. (1925) Geology and ore deposits of the Aravaipa and Stanley mining districts, Graham County, Arizona, USGS Bull. 763: 86.
Denton, T.C. (1947) U.S Bureau of Mines Report of Investigation 4007.
Flagg, A.G. (1942), Vanadium report, Book II, Aravaipa Mining District: 2.
Wilson, E.D., et al (1950), Arizona zinc and lead deposits, part I, Arizona Bureau of Mines Bull. 156: 62.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 80.
Simons, F.S. (1964), Geology of the Klondyke quadrangle, Graham and Pinal Counties, Arizona, USGS PP 461: 148.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 425.
USGS Klondyke Quadrangle map.
Arizona Department of Mineral Resources U file.
Arizona Department of Mineral Resources Silver Coin Extension file.
U.S. Bureau of Mines War Materials Report 130 Verdun Mine, Graham County, Arizona (1943).
MRDS database Dep. ID #10039488, MRDS ID #M050156; and Dep. ID #10137463, MAS ID #0040090316; and Dep. ID #10161087, MAS ID #0040090284.
Mineral List
4 entries listed. 4 valid minerals.
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