Mammoth Mine, Silver Bell Mining District, Silver Bell Mountains, Pima County, Arizona, USAi

Regional Level Types
Mammoth Mine	Mine
Silver Bell Mining District	Mining District
Silver Bell Mountains	Mountain Range
Pima County	County
Arizona	State
USA	Country

‡Ref.: Stewart, C.A. (1912) The geology and ore deposits of the Silverbell mining district, Arizona, AIME Bull. 65: 455-505 (AIME Transactions, Vol. 43: 240-290.

University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 29.

Richard, K.E. & Courtright, J.H. (1954), Structure & Mineralization at Silver Bell, Arizona, Mining Engineering, Vol. 6(11): 1095-1099 (AIME Transactions, 1954 - Vol. 199 (1955)).

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 43.

Richard, K.E. & Courtright, J.H. (1966), Structure & Mineralization at Silver Bell, Arizona, in Titley, S.R. and Hicks, C.L., eds., Geology of the porphyry copper deposits, southwestern North America: 157-163 (University of Arizona Press).

Elevatorski, E.A. (1971), Arizona Fluorspar, Arizona Department of Mineral Resources, U.S. Bureau of Mines Report of Investigation 5651: 33.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 143 (Table 4).

Elevatorski, E.A. (1971), Arizona Fluorspar, Arizona Department of Mineral Resources, U.S. Bureau of Mines Report of Investigation 5651: 49.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

Mining World, Vol. 36: 1104-1107, 1147-1150.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 12 (Table 1).

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10039686, MRDS ID #M050652; and, Dep. ID #10210633, MAS ID #0040190306.

A former small underground Cu-Ag-Pb-Zn-Mo-Au-Baryte-Fluorspar mine located in the NE ¼ sec. 4 T.12S., R.8E. (Vaca Hills 15 minute topo map), 2½ miles NW of Silver Bell. First produced 1865. Owned at times, or in part, by the Huachuca Mining & Smelting Co.; Pima County Mining & Smelting Co.; Silver Bell Mining Co.; Albert Steinfeld Co.; Imperial Copper Co.; and the American Smelting & Refining Co. (ASARCO).

Mineralization is copper, and minor lead and zinc, carbonates and sulfides in fissure veins and irregular disseminations in pyrometasomatic deposits in garnetized or altered Paleozoic limestone blocks engulfed in Laramide dacite porphyry and monzonite intrusives, along a major fault zone. Alteration was hydrothermal metasomatism. Tactite present.

Local structures include a major fault zone.

Prospected and worked from the 1870's to 1931 as an underground mine. Over 1,000,000 tons of ore were produced, averaging better than 3% Cu and about 1 oz. Ag/T with minor Pb, Zn & Au.

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Link to USGS MRDS:	10039686

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