Double Eagle Mine (Gold Leaf Mine), Coyote Wash, Barry M. Goldwater Air Force Range, Wellton Hills, La Posa District (Wellton District; Wellton Hills District), Wellton Hills-Copper Mts, Yuma Co., Arizona, USA
A former underground Au-Ag-Cu mine located in central sec. 22, T10S, R18W, near the West bank of Coyote Wash, southern end of the Wellton Hills, on a military reservation. Started about 1880. Owned at times, or in part, by the Arizona Double Eagle Corp. (1933); Mr. N. Wanamaker (discoverer); and, Fuher.
Mineralization is spotty gold with minor oxidized copper minerals in a lensing, fractured, and iron stained quartz vein, in a sericitized breccia zone in strongly faulted Mesozoic gneiss that strikes Westward and dips at a low angle Southward, broken by several faults. The most prominent fault strikes Westward and dips 57ºN and is accompanied by a shattered, brecciated zone 6 feet diameter. That locally shows abundant sericitic alteration and marked staining by Fe & Cu oxides.
The main Double Eagle vein occurs within the footwall portion of this brecciated zone. Near surface it consists of 1½ feet of fractured, coarsely crystalline, white quartz filled with abundant cellular cavities, commonly filled with black or brown iron oxide.
Workings include a shaft at 100 feet (30.48 meters) deep and a short adit on the main vein; similar workings exist on nearby veins. This mine was worked intermittently from the late 1880's to the ealy 1930's. It produced some 50 or more tons of ore averaging about 1.6 oz. Au/T, 0.8 oz. Ag/T and 0.3% Cu.
ReferencesWilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 173-174.
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: 151.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 160 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10102459, MRDS ID #M002542; and, Dep. ID file #10134603, MAS ID #0040270184.
| Gold|| Muscovite|
2 entries listed. 1 valid mineral.
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Locality Updated: Fornos de Algodres, Guarda District, PortugalFrom Rui Nunes, 7th Mar 2014 12:21:38