‡Ref.: Stevens, J.H. (1904) The Copper Handbook, Vol. IV.
Stevens, J.H. (1905) The Copper Handbook, Vol. V.
The Copper Handbook (1907).
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 120-124.
Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima County, Arizona, USGS Bull. 1027-F: 320.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 129 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 13 (Table 1).
USGS Sahuarita Quadrangle topo map.
Arizona Bureau of Mines file data, circa 1973.
MRDS database Dep. ID file #10161909, MAS ID #0040191152; and, Dep. ID #10186571, MRDS ID #M050159, MAS ID #0040190428.
A group of surface and underground Cu-Ag-Au mines and prospects located on 4 claims in the SE¼NE¼NW¼ sec. 15, T.18S., R.15E. (Sahuarita 15 minute topo map), about ¾ mile north of Helvetia, in the NW slope of a prominent foothill, known as Tiptop Mountain, on a military reservation. Owned at times, or in part, by the Tiptop Copper Co. of Philadelphia; American Smelting & Refining Co. (ASARCO); Chamrod; Forbes; Mattingly; Sierra Mining & Ranching Co.; Tip Top Mining Co.; and the D. & P. Mining Co. (1936).
Mineralization is irregular pockets, stringers, and pyrometasomatic replacement orebodies, mostly oxidized, with copper minerals, often associated with quartz stringers and seams in shattered, faulted, silicified, and silicated Paleozoic limestone close to a contact with underlying Paleozoic quartzite in a thrust-faulted klippe.
Workings include shallow shafts, tunnels and open cuts. Produced intermittently from the late 1890's to 1936. Production was over 27,000 tons of ore averaging about 5% Cu and 0.4 oz. Ag/T.
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Map Reference: 31°49'59"N , 110°45'0"W
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