Mine detail: Rochester

Previously called 'Coeur RochesterNenzel HillNBMG Sample Site 2645'

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Location

Lat / long: 40.29073, -118.14153

Resource(M)

Primary: Gold, Silver
Secondary: Lead, Zinc, Copper, Antimony
Ore: Acanthite, Anglesite, Argentite, Chalcanthite, Chalcocite, Chalcopyrite, Chlorargyrite, Covellite, Electrum, Embolite, Galena, Melanterite, Owyheeite, Polybasite, Pyrargyrite, Pyrite, Pyrrhotite, Silver, Sphalerite, Stromeyerite
Gangue: Goethite, Hematite, Limonite, Quartz, Sericite
Discovery year: 1905

Production

Operation type: Unknown
Production size: Large
Development status: Producer
Production years: 1912-1928; 1986-PRESENT
First production started: 1912
Last production ended: 1993

Geology

Host rock:Rochester Rhyolite, Koipato Group;Weaver Formation, Koipato Group
Host type:Volcanic Rock (Aphanitic),Volcanic Breccia (Agglomerate),Rhyolite
Structure:Broad, Asymmetrical Anticlinal Arch, 2 Major Normal Fault Systems; Post Mineral Faults
Alteration processes:Silicification, Oxidation

References

MRDSM060371
DEP10042547
Reference{Analytical Data:: 1: ORAL PRESENTATION DURING ROCHESTER MINE TOUR, GSN, 25 SEPT/93 2: DATA FRO M NBMG SAMPLE 2645}{Deposit:: STRUSACKER, E., (ED.), 1993, GOLD AND SILVER DEPOSITSF WESTERN NEVADA: GEOLOGICAL SOCIETY OF NEVADA SPECIAL PUBLICATION NO.18, 1993 FALL FIELD TRIP GUIDE}{Deposit:: SCHRADER, F.C., 1914, THE ROCHESTER MINING DISTRICT, NEVADA: USGS BULLETIN 580-M}{Deposit:: KNOPF, A., 1924, GEOLOGY AND ORE DEPOSITS OF THE ROCHESTER DISTRICT, NEVADA: USGS BULLETIN 762, PP.78-81}{Deposit:: VIKRE, P.G., 1977, GEOLOGY AND SILVER MINERALIZATION OF THE ROCHESTER DISTRICT, PERSHING COUNTY, NEVADA: STANFORD UNIVERSITY, UNPUBLISHED PHD. DISSERTATION}{Deposit:: VIKRE, P.G., 1981, SILVER MINERALIZATION OF THE ROCHESTER DISTRICT, PERSHING COUNTY, NEVADA: ECONOMIC GEOLOGY, V.76, PP 580-609}{Deposit:: JOHNSON, M.G., 1977, GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULLETIN 89, PP.78-80}{Deposit:: BONHAM, H.F. AND HESS, R.H., 1993, IN, THE NEVADA MINERAL INDUSTRY-1992: NBMG SPECIAL PUBLICATION MI-1992, P26}{Deposit:: TINGLEY, J.V., 1985, NENZEL HILL, NBMG SAMPLE 2645, PERSHING COUNTY, ROCHESTER DISTRICT; NBMG UNPUBLISHED MINING DISTRICT (TINGLEY) FILES}{Deposit:: NEVADA BUREAU OF MINES AND GEOLOGY, MINING DISTRICT FILES, VARIOUS CLIPPINGS, 1983-1985}{Deposit:: MINSEARCH ANNUAL, 1984-1985, V. VII, PP 380-384; METALS ECONOMICS GROUP, BOULDER, CO}{Deposit:: BONHAM, 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 DISTRICT, NEVADA: NBMG OPEN FILE REPORT 85-5}{Deposit:: NBMG, 1994, MI-1993}{Deposit:: NEVADA DIVISION OF MINERALS, 1994}{Production:: JOHNSON (1977, P.80); BONHAM AND HESS (1993, P.26) MI-1993}
ReporterHarner, Joy L. (Roberts, Ralph J.), La Pointe, D.D., Marcus, Susan, Li, Zhiping (Moyer, Lorre A.)