Latitude: 33°26'30"N
Longitude: 110°51'41"W
A placer copper deposit located in sec. 7, T1N, R15E, in Tinhorn Wash, east of Sleeping Beauty Peak and east of the Copper Cities open pit mine, about 3 miles N of Miami, on National Forest land. Worked circa 1929-1930 by the Porphyry Reserve Copper Co.
Mineralization is terrace deposits of stream gravels cemented by copper carbonates and silicate. The gravels are composed of detritus of local origin, mainly fragments of quartz monzonite, granite, porphyry, diabase, quartzite, and limestone. The fragments are firmly cemented by limonite and copper carbonates deposited by supergene solutions that carried iron and copper, probably as sulfates, leached from the nearby Copper Cities copper deposit. Much of the copper occurs as replacement shells of malachite coating fragments of limestone; the rest is partly in the matrix and partly in the diabase fragments, where it probably replaces carbonates formed by weathering of the diabase.
Production was some 350,000 pounds of Cu. Production was included in totals for the Copper Cities Mine.
References
Peterson, N.P. (1962), Geology and ore deposits of the Globe-Miami District, Arizona, USGS PP 342: 89, 140-141.
MRDS database Dep. ID #10027463, MRDS ID #M003146.
Mineral List
1 entry listed. 1 valid mineral.
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