Latitude: 32°44'17"N
Longitude: 114°22'32"W
A Au-Cu-Fe prospect with underground workings located in sec. 12 & in the NE¼, sec. 13, T8S, R21W (protracted), near the NE tip of the Gila Mountains, on BLM-administered land. Operated by the Amoco Minerals Co., Englewood, CO (1986).
Mineralization is in metamorphosed Mesozoic (?) sediments near Mesozoic granite. It is hosted in black schist that strikes N.75ºW. & dips 70ºS. & has been cut by several faults. 2 neighboring quartz veins, generally less than 2 feet wide, strike & dip approximately with the schist. Quartz of the veins is dense, vitreous & white. In places extensively brecciated & cemented with ferruginous calcite and hematite that weather black.
Workings include an old shallow shaft & a few old short tunnels. During 1984-1986, a geologic evaluation and surface drilling project was undertaken. No production record.
References
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 200-201.
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: 145 (Table 4).
Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.
MRDS database Dep ID file #10095035, MRDS D #M004591; and, Dep. ID #10186440, MAS ID #0040270281.
Mineral List
2 entries listed. 1 valid mineral.
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