‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 168, 170.
Drewes, H.D. (1971) Geologic map of the Sahuarita quadrangle, southeast of Tucson, Pima County, Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-613, 1 sheet, scale 1:48,000.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10039504, MRDS ID #M050178; and, Dep. ID #10161735, MAS ID #0040190563.
A former small underground Cu mine located in sec. 19, T19S, R15E, about 1/3 mile ESE of McCleary Camp, north of Stone Cabin Canyon, and 30 iles S of Tucson on open ground. Discovered 1915.
Mineralization is a replacement deposit hosted in the Mount Wrightson Formation. Country rock is rhyolite which is agglomeratic or brecciated. It is on a 14 foot lode of silicified rhyolite and quartz which extends from the surface down and contains copper sulfides and carbonates in irregular bodies. The ore strikes N45W and dips 80N. Much of the ore has been formed by enrichment and replacement in the rhyolite. A 2 to 6 inch (5 to 15 cm) pay streak, consisting principally of chalcocite and other copper ore minerals, is reported to occur on either wall from a depth of 65 feet below the surface, or ground water level, to the bottom of the shaft. The deposit belongs to the late Tertiary period of metalliztion. Ore control was a porous breccia zone. Alteration was propylitic; pyrite-chalcopyrite-gossan.
Local structures include thrust and normal faulting, fracture zones, homoclinal. Regional trends include tilting and broad open folds in the south and extensive faulting in the north.
Workings include a 100 foot deep shaft that is inclined 85ºSW. No production record.
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Map Reference: 31°46'19"N , 110°51'15"W
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