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Nogales Mining District | |||||||||||||||||||||||||||||||||||||||||||
aka Gold Hill District. Mount Benedict area between Santa Cruz river and Nogales Wash. This district is in Santa Cruz county.
Location23S, 14E6 Mineral ProductsAu, Pb, Ag, Cu, W (Mo)6 Geology1. Irregular fissure veins, with spotty, often banded, pyrite, cerussite, galena, and minor copper carbonates and sulfides, in Jurassic quartz monzonite that has been strongly sliced by sheeted fracturing and intruded by splite, granite, porphyry, diorite, lamprophyre, and diabase dykes. 2.Irregular and lensing, comb structured quartz-wulfamite veins with minor scheelite associated wth dikes cutting Jurassic quartz monzonite. 3. Spotty gold placer deposits reported in Guebabi Canyon (NE, T23S, R14E) and on east slope of Mt. Benedict.6 Types of operation and productionMostly shallow shaft, tunnel and open cut operations. Worked as early as the 1850's and sporadically up to 1967. Estimated and recorded production would amount to some 1,100 tons of ore containing about 1,019 oz. of gold, 95 tons of lead, 14,200 oz. of silver and 9 tons of copper. About 1,500 pounds of 50% WO3 concentrates may have been shipped. Output from gold placers unknown but probably relatively small.6.
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