A former underground Pb-Ag-F-Ba-V-Mo-Zn-Au-Cu (As-Se-Be-Sb) mine group located in South-central sec. 25, North-central to South-central sec. 36, T.4S., R.19W. (protracted), on the Kofa Game Range. The property consisted of 1 patented claim and numerous unpatented claims. The mines and claims of this vein also included claims named/formerly named the Caledona, the William Penn and the Miller, all of which are apparently now covered, or partially covered, by the mines listed under this group. These particular mines were owned at times, or in part, by Miller & Nagle, Miller & Hopkins, Castle Dome Mining and Smelting Co., Gondolfo & Sanguinetti, Mrs. Elizabeth De Luce, and numerous later lessees and operators.
Mineralization is a lensing and branching vein zone traceable for some 5,000 feet (1524 meters), a few inches to several feet wide (0.61 meters wide), with a depth to bottom of 60.96 meters. It strikes S25E and dips 70W. The surface is largely covered by up to 200 feet of gravel. Wall rocks are of Mesozic shale cut by large diorite porphyry and smaller quartz porphyry dikes, with veins best developed near or on contact of two types of dikes. Irregular and discontinuous orebodies, possibly related to cross-fractures. Locally abundant fluorite. Alteration includes shales that are somewhat chloritized, vein wall rocks are altered to quartz, calcite and sericite. The best ore was located at the contact of two types of dikes. Pyrite metacrystals, altered to limonite, are present.
Workings include extensive stoping of ore shoots down to at least 250 feet (76.2 meters) from numerous incline shafts. Total length of workings is 1524 meters. Worked before 1870. Most mining was done prior to 1890. Total production unknown.
References
Blake (1880).
Blake, W.P. (1881a), Vanadinite in Arizona, American Journal of Science: 22: 235.
Blake, W.P. (1881b), On the occurrence of vanadates of lead at the Castle Dome mines in Arizona, American Journal of Science: 22: 410-411.
Nevius, J.N. (1912) The Castle Dome lead district, Arizona: Mining and Scientific Press: 104: 854-855.
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 95-96.
Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 110-111.
Keith, Stanton B. (1978), State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma County, Arizona: 119 (Table 4).
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10037078, MRDS ID #M030339.
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