Latitude: 33°13'51"N
Longitude: 113°51'27"W
A Au prospect located in the NE¼ sec. 25, T2S, R16W (protracted), on land of unknown status.
Mineralization is varied: (1) Scattered, short, lenticular, and narrow, gold-bearing quartz, carbonate, iron oxide and minor, partly oxidized, copper and iron sulfide veins in fissure zones in Mesozoic granitic intrusive and metamorphic schist, with dioritic to rhyolitic dikes. Wall rocks are sericitized, silicified, and carbonatized. Gold concentrated by weathering in near-surface iron oxides and quartz.
Country rock is granite exhibiting coarse, pinkish phenocrysts of orthoclase and dark minerals, largely chlortized. It is cut by dikes of diorite porphyry & rhyolite porphyry & adjacent to veins, is rather intensely altered to sericite and carbonite. The vein strikes N20E & dips 45W.
Workings include an old, irregular shaft about 300 feet deep along the dip of the vein and a few short, irregular drifts.
References
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 41, 42, 124-125.
Arizona Bureau of Mines Bull. 135 (1933), Arizona Gold Placers & Placering: 23.
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: 148.
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: 179 (Table 4).
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 262.
U.S. Bureau of Mines file data.
MRDS database Dep. ID file #10162352, MAS ID #0040271055.
Mineral List
11 entries listed. 7 valid minerals.
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