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Busterville Mine, Avra, Amole District, Tucson Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 32° 19' 41'' North , 111° 10' 52'' West
Latitude & Longitude (decimal): 32.32806,-111.18111
Other regions containing this locality:Sonoran Desert, North America


‡Ref.: Lee, C.A., and Borland, G.C. (1935) The geology and ore deposits of the Cuprite mining district: Tucson, University of Arizona, M.S. thesis, 54 p.

Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 20, 27, 28.

Ashley, R.P. (1974), Field Examination (Busterville Mine).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 143, 346, 392.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10039677, MRDS ID #M050636; and, Dep. ID #10210497, MAS ID #0040190464.

A former small surface and underground Ag-Pb-Au-Zn-Cu mine located in sec. 01, T13S, R11E.

Mineralization is ore in veinlets in a shear zone. Alteration is argillitic; chalcopyrite gossan. The ore is 0.5 meters wide, strikes N38W and dips 50E. The dip of the shear zone appears to become shallower immediately below surface. Quartz veining with limonite, Cu silicates, malachite and some relict chalcopyrite. Also some Cu silicates on fractures. Quartz veins to several cm. Some late calcite veining. Andesite is fine-grained.

Workings include inclined shafts, 4 pits and a tunnel over 80 meters long.

Mineral List


7 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Ypresian - Campanian
47.8 - 83.6 Ma
Early Tertiary to Late Cretaceous volcanic rocks

Age: Phanerozoic (47.8 - 83.6 Ma)

Stratigraphic Name: Williamson Canyon Volcanics

Description: Rhyolite to andesite and closely associated sedimentary and near-surface intrusive rocks; commonly dark gray to dark greenish gray or greenish brown. In the ranges west of Tucson, this unit includes thick welded ash-flow tuffs. Volcanic rocks of this unit are inferred to be derived from vents and volcanoes above magma chambers that solidified to form the granitic rocks of map unit TKg. These rocks are restricted to southeastern Arizona except for a small outcrop near Bagdad. (50-82 Ma)

Comments: Related, broadly, to unit TKg

Lithology: Major:{rhyolite,dacite,andesite}, Minor:{clastic}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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