A Pb-Ag-F-V-Mo-Cu group of claims within the larger group of Adams 20 claims. Located in the SW¼ sec. 31, T.4S., R.18W. (protracted). Owned by Adams, Stephans, Hudson.
Mineralization is irregular and spotty masses of coarsely crystalline galena, usually coated with anglesite, cerussite and lead oxides, in a gangue of crystalline fluorite and brown to black calcite with iron-stained gouge and brecciated wall rock, in lensing fault zones up to 8 feet wide, cutting Mesozoic shale, metamorphosed to slate. Intrusions of diorite-porphyry dikes and a few small irregular masses of quartz porphyry. Vanadinite and wulfenite are found locally in vugs in the mineralized zones and some minor oxidized copper minerals.
References:
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 101-110.
Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 113.
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: 117 (Table 4).
Arizona Bureau of Mines file data.
Mineral List:6 entries listed. 6 valid minerals.
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