Latitude: 32°47'2"N
Longitude: 114°23'18"W
A former underground Au-Ag-Fe-Cu-Mn mine located in secs. 26 & 35, T7S, R21W, on the SE margin of the Laguna Mountains, about 1½ miles N of the Gila River, on a military reservation.
Mineralization is free, often ragged, gold with silver and minor copper, in lenticular and brecciated quartz veins, usually containing abundant iron oxides and some manganese oxides, siderite, gypsum and gouge, along a fault or fracture zones in Mesozoic schist cut by dikes and irregular masses of granite and pegmatite. The gold is related to Early Tertiary muscovite pegmatites. A quartz vein outcrops a feet feet west of a parallel dike of aplitic granite. The vein is 2 feet or more wide, dips westward and extends S.15ºW. for about 300 feet, then changes strike and narrows.
Workings are relatively shallow shafts, tunnels and open cut operations. Workings consist of a stope from the surface to a depth of 25 feet and for a length of 75 feet, and an inclined shaft. The mine group was worked intermittently from the 1860's to about 1940. They produced some estimated and recorded 500 tons of ore averaging about 0.4 oz. Au/T, 0.1 oz. Ag/T and 198 pounds of copper.
References
Raymond, R.W. (1872) Statistics of mines and mining in the states and territories west of the Rocky Mountains [3rd report]: U.S. Treasury Department, 566 p.: 272.
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 214-216.
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: 149-151.
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: 157 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10027237, MRDS ID #M002572.
Mineral List
3 entries listed. 3 valid minerals.
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