Coeur Rochester Mine

Pershing County, Nevada, United States

SilverGoldLeadZincCopperAntimony

⌖ Show on map USGS source ↗

Description

John Nenzel

Commodities

PrimarySilver, Gold

SecondaryLead, Zinc, Copper, Antimony

Commodity typeM

Deposit

Deposit typehydrothermal stringer zone

Model150: Epithermal vein, Comstock273: Low-sulfide Au-quartz vein

Deposit sizeL

Orebody formtabular, pipelike, blanket, irregular, disseminated

Ore controlHigh angle faults control ore formation.

Materials

Ore mineralsPyrite, Sphalerite, Tetrahedrite, Arsenopyrite, Chalcopyrite, Galena, Covellite, Chalcocite, Stromeyerite, Polybasite, Pyrargyrite, Acanthite, Argentite, Argentojarosite, Chlorargyrite, Embolite, Silver, Chalcophanite, Melanterite, Anglesite, Chalcanthite, Pyrrhotite, Teallite, Owyheeite, Electrum, Feldspar, Sericite, Limonite, Hematite, Goethite, Clay

GangueQuartz

Geology

Host rockRhyolite,Volcanic Breccia (Agglomerate),Trachyte,Mixed Clastic/Volcanic Rock · "Rochester Rhyolite, Koipato Group", "Weaver Formation, Koipato Group"

StructureRocks are folded into a broad, asymmetrical anticlinal arch., There are 2 major normal fault systems and post- mineral faults.

AlterationSilicification and oxidation are prevalent in the deposit.

Economic & production

Development statusProducer

Production years1912-1928; 1986-2004

First production1912

Discovery year1905

Identification

Deposit ID10310354

MRDS IDM060371

Alternate namesRochester Mine, Nenzel Hill, East pit, West pit

RegionNA

Data scoreA

Coordinates40.29073, -118.14153

References

Strusacker, E., (ed.), 1993, Gold and Silver Deposits of Western Nevada: Geological Society of Nevada Special Publication No.18, 1993 Fall Field Trip GuideSchrader, F.C., 1914, The Rochester Mining District, Nevada: USGS Bulletin 580-MKnopf, A., 1924, Geology and Ore Deposits of the Rochester District, Nevada: USGS Bulletin 762, pp.78-81Vikre, P.G., 1977, Geology and Silver Mineralization of the Rochester District, Pershing County, Nevada: Stanford University, Unpublished Phd. DissertationVikre, P.G., 1981, Silver Mineralization of the Rochester District, Pershing County, Nevada: Economic Geology, v.76, pp 580-609Johnson, M.G., 1977, Geology and Mineral Deposits of Pershing County, Nevada: NBMG Bulletin 89, Pp.78-80Bonham, H.F. and Hess, R.H., 1993, in, The Nevada Mineral Industry-1992: NBMG Special Publication MI- 1992-2002 p26Tingley, J.V., 1985, Nenzel Hill, NBMG Sample 2645, Pershing County, Rochester District; NBMG Unpublished Mining District (Tingley) FilesNevada Bureau Of Mines And Geology, Mining District Files, Various Clippings, 1983-1985Minsearch Annual, 1984-1985, v. vii, pp 380-384; Metals Economics Group, Boulder, COBonham, H.F., Garside, L.J., Jones, R.B., Papke, K.G., Quade, J., Tingley, J.V., 1985, A Mineral Inventory of the Paradise-Denio and Sonoma-Gerlach, Winnemucca BLM District, Nevada: NBMG Open File Report 85-5NBMG, 1994, MI-1993Nevada Division of Minerals, 1994Coeur d'Alene Mines Corp.,1997 Annual Report.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.Crafford, A.E.J. (ed.), 2003, GSN Road Log 44, Coal Canyon Road East from I-80 Exit 112.Coeur d'Alene Mines Corp, press release, 5/14/02The Mining Record, 8/13/02.Harvey, David, Chadwick, Thomas, and Krewedl, Dieter, 2002, Geology and Mineralization in the Rochester and Nevada Packard Deposits, in Geological Society of Nevada Fall 2002 Field Trip Guidebook, Precious Metals Deposits of the Humboldt Range, New Discoveries in an Old District; GSN Special Publication No. 36.