Dos Cabezas placers, Dos Cabezas, Dos Cabezas (Two Heads) District, Dos Cabezas Mts, Cochise Co., Arizona, USA
‡Ref.: Wilson, E.D. (1927), Arizona Gold placers, 2nd. ed. (revised), University of Arizona Bull. 124: 51.
Arizona Bureau of Mines Bull. 135 (1933), Arizona Gold placers &
Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 69.
Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355, 103 p.
Orris, G.J. and Bliss, J.D. (1985), Geologic and Grade Volume Data on 330 Gold Placer Deposits, USGS Open-File Report 85-213, 172 pp.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 236.
MRDS database Dep. ID file #10014838, MRDS ID D011818; and, Dep. ID #10258728, MAS ID #0040030267.
A surface placer gold deposit area located in secs. 14, 16, and 22, T14S, R28E, and secs. 27, 29, 31 through 34, T14S, R27E, near the village of Dos Cabezas, at over 5,000 feet of altitude. Discovered 1901. Produced 1906-1914, 1934-1936. Closed 1947.
Mineralization is a placer gold deposit with concentration due to mechanical enrichment of heavy elements. A sampling of gravels to a depth of 6 feet assayed $4.08/Cubic yard ($35 US/Troy ounce Au [about 0.11 TO Au per CY]).
Gold was found in nearly all the canyons around Dos Cabezas. Alluvium in small streams draining an area of Au (Ag-base metal) vein deposits along the southwest flank of the Dos Cabezas Mountains. The veins are associated with a major fault zone. Gravels extend to at least a depth of 6 feet and are located in gulches and on pediments. The gold is usually flat, ragged, and coarse. Nuggets ranged from 1 to 20 ounces in size.
Development 1 DISCOVERED IN 1901 AND OPERATED CHIEFLY AS DRY PLACERS UNTIL ABOUT 1947.
Environment 1 Hydrologic unit code calculated 3-94 using GIS overlay analysis with 1:1000000(est) scale federal ownership boundaries.
Location 1 LOCATED NORTH AND NORTHEAST OF DOS CABEZAS.
Workings 1 DRY PLACER USED DRYLAND DREDGE.
1 entry listed. 1 valid mineral.
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