Hull Mine, Hull Mine group (Rialto Mine group; Hull group of claims; Rialto claims), Buckeye vein group, Castle Dome Mine group, Kofa Game Range, Castle Dome District, Castle Dome Mts, Yuma Co., Arizona, USA

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A Pb-Ag-F-Ba-V-Mo-Zn-Au-Cu (As-Se-Be-Sb) mine.

Mineralization is irregular masses of partly oxidized argentiferous galena in a gangue of fluorite and calcite, up to 12 feet wide, and over some 2,000 feet in length, in a lensing vein along a fault zone with intersecting faults containing gouge and mineralization. Some wulfenite and associated vanadinite and vanadiferous mimetite occur in open cavities. Wall rocks are Mesozoic shale, limestone, and sandstone, strongly sericitized with some silicification and chloritization, cut by diorite porphyry dikes. Surface exposures are limited by the gravel cover of the rock pediment.

Workings include stopes worked from shafts. Total production for the group would be some 20,000 tons or more of ore.

References

Blake (1880).

Blake, William P. (1881a), Vanadinite in Arizona, American Journal of Science: 22: 235.

Blake, William P. (1881b [1882]), On the occurrence of vanadates of lead at the Castle Dome mines in Arizona, American Journal of Science, 3rd series: 22: 410-411.

Ladoo, R.B. (1923), Fluorspar mining in the western states, U.S. Bureau of Mines Report of Investigation 2480.

Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 99-100.

Batty, J.V., et al (1947), Concentration of fluorite ores from Arizona, California, Idaho, Montana, Nevada, and Wyoming, US Bur. Mines Rept. Inv. 4133.

Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 18.

Peterson, N.P. (1947), Phosphate minerals in the Castle Dome copper deposit, Arizona, American Mineralogist: 32: 574-582.

Wilson, E.D. (1951) Castle Dome district, Chap. X, in Arizona zinc and lead deposits, Part II: Arizona Bureau of Mines Bulletin no. 158: 111-112.

Keith, Stanton B. (1978), State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 120 (Table 4).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 159, 224-225, 229, 411.

Arizona Bureau of Mines file data.

Mineral List

Calcite Cerussite Fluorite

Galena var: Argentiferous Galena Mimetite var: Vanadian Mimetite

Muscovite var: Sericite Vanadinite Wulfenite

9 entries listed. 6 valid minerals.