Farmer Mine, Nogales District (Gold Hill District), Santa Cruz Co., Arizona, USA
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U.S. Bureau of Mines file data-cluster #30 - Farmer.
USGS Nogales Quadrangle topo map.
Simons, F.S. (1974) Geologic map and sections of the Nogales and Lochiel quadrangles, Santa Cruz County, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-762, 9 p., 1 sheet, scale 1:48,000.
U.S. Bureau of Mines field notes AU21.
MRDS database Dep. ID file #10026828, MRDS ID #M000446; and, Dep. ID #10137530, MAS ID #0040230189.
A former small Au-Pb-Cu mine located in the E½E½SE¼ sec. 29, T23S, R14E, 6 miles N of Nogales, on private land. Operated by Farmer and Wolfe.
Mineralization is a tabular ore body in lensing veins in an irregular shear zone hosted in quartz monzonite. Cash veins in a deeply eroded batholith. The ore is in irrgular pockets and impregnations. Ore concentration was secondary enrichment. Local structures include pyritized lamprophyric dikes, numerous NW-trending aplite dikes and a major fault trending N-S. An assoxciated rock unit is plutonic igneous rock. There is no evidence for enrichment at depth.
There are no production figures. This mine has produced gold. 2 samples assayed .10% Cu, 0.90% Cu, 1.02% Pb and 0.02% Au, 0.10% Cu, 0.14% Pb.
No entries listed.
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