A former underground Pb-Cu-Ag-Zn-Au-Mo-Bi-perlite mine and group of 132 unpatented claims located in the NW¼ sec. 26, and the NE¼ sec. 27, T4S, R15E, about 1½ miles east of the 79 Mine, 3-4 miles NW of Hayden, on the NW side of Toronado Peak, ½ mile S of Chilito, on federal land. Discovered by Mr. Watson in 1880. Closed 1950. Claims extend into sec. 27. In 1913 the London-Arizona Consolidated Copper Co. merged London-Range, London-Arizona, and the O'Carroll & Ball shafts, and the Curtin (Humphrey) shaft, but some were later split. Other operators included the Toronado Gold Mining Co.; David Hartley; and J.W. Wright. Additional names that apply to this property: O'Carroll claims; Humphrey property; Reagen property; D.H. claims.
Mineralization is an irregular ore body hosted in Percha Shale and the Martin Formation. Ore control was the Chocolate fault and the base of the Martin Formation. Ore concentration was the oxidation process. An associated rock unit is rhyodacite.
The London-Arizona ore deposit probably represents the outer peripheral zone of a major ore body with the portions towards the main intrusive contact being eroded away.
Workings include a 180 foot deep shaft on London-Range; the 325 foot deep Curtin shaft; and some shallow shafts. Over 1500 feet of drifts, tunnels, and crosscuts. Production was some $1,050,000 between 1912 & 1928 (period values).
References
Ross, Clyde P. (1925) Ore Deposits of the Saddle Mountain and Banner Mining Districts, Arizona, USGS Bull. 771: 61, 65.
Weed, W.H. (1925), The Mines Handbook: Vol. XIII: 389.
Flagg, A.G. (1942), Vanadium report, Book I to Book VIII, Arizona Department of Mines Mineral Resources (unpublished): books 2 & 8.
Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 81-82.
U.S. Atomic Energy Commission Report 172-480 (1953), Gila County Preliminary Reconnaissance Report: 23.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 50.
Eastlick, John T. (1968), in: Ore Deposits of the United States, 1933-1967. Graton Sales Volume, John D. Ridge editor, A.I.M.E.: 1191-1210.
Koschmann, A.H. and Bergendahl, M.H. (1968) Principal Gold Producing Districts of the United States. USGS PP 610: 38.
Banks and Krieger (1977) USGS Map GQ-1391.
Elevatorski, E.A. (1978), Arizona Industrial Minerals, Arizona Department of Mineral Resources, Minerals Report No. 2: 31.
Hicks, C.J. (1979), Molybdenum occurrences in Arizona, Arizona Department of Mineral Resources Mineral Report #3: 16.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
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