Mine detail: Tonopah District

Previously called 'MizpahWest End ConsolidatedHalifax TonopahJim Butler TonopahMacNamaraMizpah ExtensionMontana - TonopahNorth StarRescue EulaTonopah BelmontTonopah ExtensionTonopah Midway Mines'

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Location

Lat / long:

38.08327, -117.21925

Resource(M)

Primary:	Gold, Silver
Secondary:	Copper, Lead
Tertiary:	Tungsten, Arsenic
Ore:	Argentite, Pyrargyrite, Cerargyrite, Polybasite, Stephanite, Tetrahedrite, Galena, Electrum, Iodyrite, Embolite, Cinnabar, Scheelite, Wolframite, Silver
Gangue:	Quartz, Barite, Apatite, Opal, Turquoise, Pyrite, Sericite, Adularia, Jasper, Calcite, Rhodochrosite, Cacoxenite, Pharmacosiderite
Orebody form:	Tabular to irregular
Discovery year:	1900

Production

Operation type:	Underground
Deposit type:	epithermal vein deposits
Production size:	Large
Development status:	Producer
Production years:	1900-1947
First production started:	1900
Last production ended:	1947

Geology

Host rock:	Mizpah Trachyte, Tonopah Formation, West End Rhyolite
Host type:	Trachyte,Andesite,Rhyolite,Tuff,Volcanic Breccia (Agglomerate),Sedimentary Rock
Associated rock:	Extension Breccia, Sandgrass Andesite, Esmeralda Formation
Associated type:	Rhyolite
Structure:	Major structures include the Halifax Fault Zone (N-S) and the Tonopah Fault. The youngest group strike NE, NW, and N-S, dipping W., The Tonopah fault, the N-S-trending Halifax Fault Zone, the Merton fault, and the Monarch-Pittsburg fault.
Alteration processes:	Dominant alteration types affecting volcanic host rocks are silicification, sericitization, argillization and kaolinization . Andesite has been altered to chlorite and calcite. Rhyolite has been altered to chlorite, calcite, pyrite, quartz, sericite, and siderite.

References

MRDS	D001289
DEP	10310396
Reference	{Deposit:: Kral, V E, 1951, Mineral Resources of Nye Co., Nev,: Nev. Univ. Bull. v. 45, no. 3, Geology and Mining Series, No. 50, p. 171}{Deposit:: Lincoln, F. C. 1923, Mining Districts and Mineral Resources of Nevada; Reno, Nev. Newsletter Pub. Co., p. 186}{Deposit:: Nolan, T. B. 1935, The Underground Geology of the Tonopah Mining Dist. Nev; Nev. Univ. Bull., v. 29 no. 5, p. 13}{Deposit:: Koschmann and Bergendahl, 1968, Gold Districts of the U.S.; USGS Prof. Paper 610, p.4.}{Deposit:: Balliet, L. W, 1914, The Geology of Tonopah, Nev.: Mining and Engineering World, vol 40, p. 837-841.}{Deposit:: Locke, A, 1912, The Geology of the Tonopah Mining Dist.: Bull. Aime vol. 62, p. 217-226.}{Deposit:: Spurr, J E, 1903, The Ore Deposits of Tonopah, Nev: USGS Bull. 219.}{Deposit:: Spurr, J E, 1904, The Ore Deposits Of Tonopah, Nev.: USGS Bull. 225 P. 88-110.}{Deposit:: Spurr, J E, 1905, Geology of the Tonopah Mining Dist., Nev.; USGS Prof. Paper 42}{Deposit:: Bailey, E. H., U S Geol. Survey, Personal Files}{Deposit:: Bailey and Phoenix, 1944, Quicksilver Deposits of Nevada: NBMG Bull. 41}{Deposit:: Burgess, 1911, The Halogen Salts of Silver and assoc. minerals at Tonopah; Econ. Geol. v. 6, p. 21}{Deposit:: Spurr, J.E., 1905, Geology of the Tonopah Mining District: USGS Prof. Paper 42, p. 184-188.}{Deposit:: Carpenter, J. A, et al., 1953, History of Fifty Years of Mining at Tonopah: NBMG Bull. 51.}{Deposit:: The Mining Record, November 25, 1981}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette.}{Deposit:: Lemmon, D.M., Unpublished Data.}{Deposit:: Lemmon, D.M., and Tweto, O.L., 1962, Tungsten in the U.S., USGS Map, MR-25.}{Deposit:: Shawn Hall, A History of Tonopah, at: website: http://www.tonopahnevada.com/history.htm}
Reporter	LaPointe,D.D. , Schruben, Paul G.