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Bunker Hill Mine (Mammoth Mine; Rattlesnake Mine; Rattlesnake deposit), Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 41' 26'' North , 110° 3' 47'' West
Latitude & Longitude (decimal): 31.6905555556, -110.063055556
 
‡Ref.: The Resources of Arizona - A Manual of Reliable Information Concerning the Territory, compiled by Patrick Hamilton (1881), Scottsdale, AZ: 38.

Church, J.A. (1903) The Tombstone, Arizona, mining district: American Institute of Mining Engineers, Transactions: 33: 29.

Ransome, F.L. (1920), Deposits of manganese ore in Arizona: Bisbee and Tombstone districts: USGS Bull. 710: 113-119.

Wilson, E.D. & G.M. Butler (1930), Manganese ore deposits of Arizona, Arizona Bureau of Mines Bull. 127: 47, 48.

Butler, B.S., Wilson, E.D., and Rasor, C.A. (1938b), Geology and ore deposits of the Tombstone district, Arizona, Arizona Bureau of Mines Bull. 143: 45, 47, 83, 107, Pl. III, IV.

Rasor, C.A. (1939), Manganese mineralization at Tombstone, Arizona, Economic Geology: 34: 790-803.

Romslo, T.M. & S.F. Ravitz (1947), Arizona manganese-silver ores, U.S. Bureau of Mines Report of Investigation 4097.

Havens, R., et al (1954), Beneficiation of oxide manganese and manganese-silver ores from southern Arizona, U.S. Bureau of Mines Report of Investigation 5024.

Hewett, D.F. & M. Fleischer (1960), Deposits of the manganese oxides, Economic Geology: 55: 1-55.

Farnham, L.L., et al (1961), Manganese deposits of eastern Arizona, U.S. Bureau of Mines Information Circuler 7990: 31-32.

Keith, Stanton B. (1973), Arizona Bureau of Mines Bull. 187, Index of Mining Properties in Cochise County, Arizona: 74 (Table 4).

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 4 (Table 1).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 342.

Arizona Bureau of Mines files.

MRDS database Dep. ID file #10039630, MRDS ID #M050528; and, Dep. ID #10136879, MAS ID #0040030585; and, Dep. ID #10137020, MAS ID #0040030010.

A former small underground Ag-Pb-Zn-Mn-Cu mine located in the SE ¼ sec. 14, T.20S., R.22E. (Tombstone 7.5 minute topo map). Discovered 1880. Produced 1889-1931. Operated at times, or in part, by Phelps Dodge; F.H. Suderstrom; the Rattlesnake Co.; the Bunker Hill Mining Co.; Bunker Hill Mines Co., Tombstone Gold-Silver Mines Co. and the Tombstone Development Co.

Mineralization is multifaceted: (1) as pockety orebodies and irregular replacements of largely-oxidized, argentiferous lead, zinc and minor copper ores in sharply folded Pennsylvanian-Permian Naco Group limestone, cuts by small faults and slips between the major fault zones (intersection of the Prompter and Rattlesnake Faults); and (2) as manganiferous silver ore in irregular pipe-like masses or chimneys in Mississippian Escabrosa Limestone and Pennsylvanian-Permian Naco Group limestone along fissure zones. The ore zone is 30.48 meters long, 9.14 meters wide, and has a depth to bottom of 157.28 meters.

Workings include extensive shaft workings. Several hundred thousand tons of silver-lead ores and a few thousand tons of manganiferous silver ore were produced from the 1880's to 1952. Medium to low grade ore.

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