Latitude: 33°22'7"N
Longitude: 113°55'23"W
A former underground Au mine located in West-central sec. 25, T1N, R17W, on the eastern extremity of the Geyser lode, near Ocotillo, northern S.H. Mountains.
Mineralization is spotty, finely divided, free gold in fractures and iron-stained breccia with gouge, calcite, and iron and manganese oxides, in andesitic volcanics. Much of the lode matter is a breccia of small andesite fragments cemented by fine-grained secondary quartz. Calcite veins of later age, some of them 6 inches (15 cm) wide, cut this breccia. Under the microscope a thin section of the breccia shows a few adularia crystals in the secondary quartz.
Workings include a 35 foot deep inclined shaft.
References
Jones, E.L., Jr. (1915), A Reconnaissance in the Kofa Mountains, Arizona, USGS Bull. 620: 161.
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 117.
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: 116 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10027208, MRDS ID #M002484; and, Dep. ID #10186721, MAS ID #0040270242.
Mineral List
4 entries listed. 2 valid minerals.
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