 | | Journal (article/letter/editorial) | | precious-metal mineralization in the southwestern Nevada volcanic field, USA S t e p h e n B. C a s t o r a a n d...i s s b "Nevada Bureau of Mines and Geology, Mackay School of Mines, Universityof Nevada, Reno, NV 89557...89557. USA bDepartment of Geological Sciences, Mackay School of Mines, Universityof Nevada, Reno. NV...NV 89557, USA (Received August 27, 1991; accepted after revision January 27, 1992 ) ABSTRACT Castor, S...southwestern Nevada volcanic field, USA. Ore Geol. Rev., 7: 193-223. The southwestern Nevada volcanic field |  | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA Peer Hen By CASTOR oan eGORY.C.oFER DOCK NEVADA AND BUREAU... UNIVERSITY Reno & Las Vegas OF NEVADA PRESS GEOLOGY Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...otherwise noted Map of Mining Districts and significant mineral occurrences of Nevada by Nevada Bureau of Mines...Cataloging-in-Publication Data Castor, Stephen B, Minerals of Nevada / Stephen B. Castor and Gregory C. Ferdock.â Ist | | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA STEPHEN B. CASTOR and G R EGOR Y C . F E R D OC K l NEVADA BUREAU...association with the UNIVERSITY OF NEVADA PRESS Reno & Las Vegas Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs...Districts and si gnificant minernl occurrences of Nevada by Nevada Bureau of Mines and Geology All rights reserved...-Publ ication Dat,i Castor, Stephen B. Minerals of Nevada/ Stephen B. Castor and Gregory C. Ferdock.- rst |  | | Report (issue) | | Properties: Tenacity: Considerably more brittle than acanthite. Hardness = âŒ2 VHN = âŒ20 (15 g load) D(meas.)...Total 99.3 100.1 100.0 100.00 (1) Comstock Lode, Nevada, USA; by electron microprobe. (2) Zmeinogorsk, Russia;... in part of supergene origin. Association: Acanthite, AuâAg alloy, chlorargyrite, naumannite, quartz...Distribution: In Indonesia, from Tambang Sawah, Benkoelen district, Sumatra [TL], and on Java, at the Pongkor AuâAg...In the USA, in Nevada, from the Comstock Lode, Virginia City, Storey Co. [TL], at the Bullfrog and Original |  | | Journal (article/letter/editorial) | | has been an important industry in the economy of Nevada, the Silver State, since territorial times (1861)...area and created the state (1864). There are 526 mining districts in the state, 60 of which produce nonmetallic...ores (Tingley 1998). Three major mining booms have occurred in Nevada: 1860-1880 (Comstock and other silver...precious-metal mining with the development of low-grade, large-tonnage mines. I n 1997 Nevada ranked first...percent, respectively, of total U.S. production. Nevada also produced 148 million pounds of copper, 4 percent |  | | Journal (article/letter/editorial) | | 31 December 2014 NEVADA MINERAL STEVEN PULLMAN 1755 Circle Drive NW Reno, Nevada 89509 RICHARD THOMSSEN...THOMSSEN P.O. Box 1656 Carson City, Nevada 89702 Map showing Nevada counties, by William W.Besse. N evada...minerals new to the state being identified every year. Nevada is one of the few western states without a published...Clark County. Walt Lombard0 specimen, Jeff Scovil photo. Churchill County Chalk Mountain District Chalk...Chalk Mountain mine: calcite, cerussite, chlorargyrite, descloizite, galena, hemimorphite, leadhillite, |  | | Journal (article/letter/editorial) | | epithermal deposits: constraints from the Broken Hills deposit, Hauraki Goldfield, New Zealand Helen A...1 Ma Broken Hills adularia-sericite AuâAg deposit is currently the only producing rhyolite-hosted epithermal...The opaque minerals include pyrite, electrum, acanthite (Ag2S), sphalerite, and galena, which are common...Hauraki Goldfield and elsewhere worldwide. Broken Hills ores also contain the less common minerals aguilarite...petrovskaite occur with high-fineness electrum. Broken Hills is the only deposit in the Hauraki Goldfield where |  | | Journal (article/letter/editorial) | | (Ag3AuS2) or petrovskaite (AgAuS), or a mixture of acanthite (Ag2S) with uytenbogaardtite or uytenbogaardtite...uytenbogaardtite or petrovskaite, or a mixture of acanthite with uytenbogaardtite or uytenbogaardtite with...covered with black crusts of silver sulfide: acanthite (Ag2S). The study of the chemical composition...Nazareno, Pongkor (Greffie et al. 2002), and Broken Hills (Cocker et al. 2013), and, therefore, their presence...47 0 7.53 Note: n = number of analyses, Ac = acanthite, Uy = uytenbogaardtite, Pet = petrovskaite. centrations |  | | Journal (article/letter/editorial) | | assemblage consist mostly of basalt to andesite and rhyolite compositions that generally contain anhydrous...showed that lowsulfidation deposits in northern Nevada could be divided into two subtypes based on their...about 22 to 4 Ma. By contrast, the bimodal basalt-rhyolite assemblage is related to continental rifting (Basin...ve Ri Yellowstone Hot Spot Wyoming 0 Ma 40° Nevada S ie GREAT BASIN rra NNR Utah Ne da va California...tectonic features. Heavy line indicates the northern Nevada rift. The heavy star at the north end of the rift |  | | Journal (article/letter/editorial) | | solid products. It has been established that acanthite, solid solutions Ag2-xAuxS (x < 0.5), and electrum...deposits showed the abundance of native gold and acanthite (argentite) (Boyle, 1968, 1979; Palâyanova, 2008a...α-argentite (Ag2S, phase transition Îł â α at 580 ÂșC), ÎČ-acanthite (Ag2S, α â ÎČ at 177 ÂșC), ÎČ-uytenbogaardtite (Ag3AuS2...initial compositions of melts Ag2-xAuxS. Ac, acanthite; Uy, uytenbogaardtite; Pet, petrovskaite; Au1-yAgy...phase is close in stoichiometric composition to acanthite or argentiteâAg2S. The second phase is referred |  | | Journal (article/letter/editorial) | | carriers, were found to be transformed into acanthite. Acanthite was also found locally in association with...identified as uytenbogaardtite (Ag3AuS2), and/or by acanthite, with both of the replacing minerals commonly...West Java, Indonesia, and Nazareño, ShilaPaula district, southern PerĂș, in order to examine the spatial...collected from surface exposures and underground mine levels. The mineralogy was determined from polished...radiation. X-ray powder data of uytenbogaardtite and acanthite were obtained using the Debye-Scherrer method |  | Castor, S. B., Boden, D. R., Henry, C. D., Cline, J. S., Hofstra, A. H., McIntosh, W. C., Tosdal, R. M., Wooden, J. P. (2003) The Tuscarora Au-Ag District: Eocene Volcanic-Hosted EpithermalDeposits in the Carlin Gold Region, Nevada. Economic Geology, 98 (2) 339-366 doi:10.2113/gsecongeo.98.2.339 | Journal (article/letter/editorial) | | Tuscarora Au-Ag District: Eocene Volcanic-Hosted Epithermal Deposits in the Carlin Gold Region, Nevada STEPHEN...B. CASTOR,â Nevada Bureau of Mines and Geology, University of Nevada, Reno, Reno, Nevada 89557 DAVID...Reno, Nevada 89511 CHRISTOPHER D. HENRY, Nevada Bureau of Mines and Geology, University of Nevada, Reno...Reno, Nevada 89557 JEAN S. CLINE, Geoscience Department, University of Nevada, Las Vegas, Nevada 89154-4010...Mexico Bureau of Geology, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 RICHARD |  | | Journal (article/letter/editorial) | | late discovery of the phenomenal Cripple Creek district, essentially subsequent to the development of...Analyses of calaverite from the Kirkland Lake district, Ontario, Canada, show up to several tenths of...1995). Calaverite is known from the Star mine in Montgomery County, North Carolina, where it occurs rarely...Vindicator mine, Haralson County, and the Consolidated and Singleton mines of the Dahlonega district, Lumpkin...Lumpkin County, Georgia. Although similarly almost unknown in the north-central states, it occurs as 5-mm |  | | Journal (article/letter/editorial) | | Minerals Corporation, 230 South Rock Blvd, Reno, Nevada 89502, USA Ricardo CASTROVIEJO Universidad PolitĂ©cnica...later open space infill resembles the Shila Paula district (Chauvet et al. 2006). Fluid inclusion petrography...chalcopyrite, polybasite-pearceite, argentite (now acanthite), and AuâAg alloy (âelectrumâ). This Ag2S enrichment...of the system. The core is still undisclosed by mining works, but the available geochemical evidence (logAg/log...(stromeyerite) or in a supergene redistribution (stage 8, acanthite II). Keywords: Pallancata, intermediate sulfidation |  | | Journal (article/letter/editorial) | | high-grade Au-Ag-Te sample from deep in the Cresson Mine, Cripple Creek, Colorado, analyzed by Unger (2008)...layer similar to electrum dendrites at Sleeper, Nevada (Saunders, 1994; Saunders and Schoenly, 1995)....minerals, and the reevaluation of many historic mining districts that took place in the latter half of...17. Fairview (NV) 18. Sandman 19. Rawhide 20. Bullfrog 21. DeLamar (Silver City) 22. Yankee Fork (Challis)...Rosita Hills 3 29. Ortiz 3, 4 30. Central City 3, 4 31. Boulder County 3, 4 32. Black Hills 3, |  | | Report (volume) | | it helpful to refer to Survey Bulletin 507, "The mining districts of the western United States," and to...abundant, it may have been completely exhausted by mining or quarrying. Deposits of minerals of wide distribution...because they occur in sufficient quantity to warrant mining for their usual products but because they furnish...E. H. Barbour, University of Nebraska, Lincoln. Nevada...........Dr. W. S. Tangier Smith, Berkeley, Cal...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found |  | | Report (chapter) | | volcanism: a review R. H. Sillitoe Department of Mining Geology, Royal School of Mines, Imperial College...hematite in felsic volcanic rocks (+ possible rhyolite plugs) in western Mexico, the western U.S.A. and...characterized in the western U.S.A. by a bimodal basalt-rhyolite suite and in F i j i b y a basaltic suite o f...in volcanic sequences ranging from andesite to rhyolite in composition, and mid- to late Caenozoic in...also base metals. Silver occurs as argentite (or acanthite) and arsenic- or antimony-bearing sulphosalts |  | | Catalog/List | | Design District Showroom 1518 Slocum Street âą Dallas, TX 75207 Heritage Auctions Design District Showroom...Director Hayley Brigham Managing Director Beverly Hills Greg Rohan President Alissa Ford Managing Director...including: Australia Colorado Brazil Mexico California Nevada Canada Venezuela Several of the South American...15 72009 Leaf Gold Nugget Bullfrog Mountains Death Valley Nevada, USA This unique and complex Gold...Point Mine Humboldt Co. Nevada, USA This brassy Gold specimen from the Windy Point Mine in Nevada is very |  | | Report (volume) | | ....................................... 102 District of Columbia ............................................................................ 187 Nevada..................................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...abundant it may have been completely exhausted by mining or quarrying. Deposits of minerals that are widely...because they occur in sufficient quantity to warrant mining for their usual products, but because they furnish |  | | Report (issue) | | standards and nomenclature. âą CONTENTS Page Page County and site name Kelly Camp Kettle Key East Knob...placer Sunset Creek placer Victor FERRY Republic district Addison Alva Stout placer Belcher Ben Hur Black...Bellevue Bi-Metallic Black Bear Blue Lake Bodie Bullfrog Bunker Hill Butcher Boy Caribou Casimer Bar placer...Beaver Mountain Boy MOlllltain Sheep Murray placer Nevada Nighthawk O.K. Okanogan Free Gold Palmer Summit... 285 . 286 . 287 . 288 PEND OREILLE Metaline district Bella May Blue Bucket Calispell Cliff Comstock |  | | Book (edition) | | OX5 1 GB, UK 225 Wyman Street, Waltham, MA 02451, USA Copyright © 2015, 2008 Elsevier B.V. All rights reserved... complicates identification (e.g., argentite-acanthite). - The Compositional Series notes related minerals...due to decreasing temperature (e.g., argentite-acanthite). âą Lamellar pressure twins, commonly of equal...(medium grey, large grain) to form an argentite/acanthite reaction rim (darker grey); the formation of such...forms yes strong red Stilleite Mottramite Acanthite Hollandite mosaic and polysynthetic Crednerite |  | | Report (volume) | | east-west, northwest, and northeast within the district. Hawkins (1982) postulated that the east-westÂ...scale east-west-trending faults in the Enfield Bell mine are are the Marlboro Canyon, Bell, and Ridge faults...upper- and lower-plate rocks in the Jerritt Canyon district is thought to be a high-angle fault. Exposure...cover in the district. REGIONAL STRATIGRAPHY Most of the rocks in the Jerritt Canyon district are Paleozoic...Enfield Bell mine, Jerritt Canyon district, Elko County, Nevada. ïżœ Geology of the Enfield Bell Mine and the |  | | Journal (issue) | | R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur...the âfamous localityâ series: the Home Sweet Home mine and Mount Antero. A fine mineralogical study of...you belong to, and where you come from. American mining schools and professional organizations have long... centering on some of the nostalgic aspects of mining in Arizona and beautifully illustrated with paintings...âMissing and presumed lostâ by the wellknown lost-mine author Kearney Egerton; âEl Doradoâs childrenâ by |  | | Book (edition) | | Rickardite II/B.04-20 Argentite II/B.05-02 II/B.05-10 Acanthite Naumannite II/B.05-30 Hessite II/B.05-40 Jalpaite...white), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum (yellowish...(greenish grey), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum (yellowish...shades), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // 8 Gold A 60 ÎŒ C...sample - photo A), dolomite (dark grey); Harstigen Mine, Pajsberg, Filipstad, VĂ€rmland, Sweden [j]; Nic |  | | Book (volume) | | Most specimen collecting is done in the Lead-Zinc mining dists. of northwestern Illinois, the glacial drift...600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravelsâŻagate, jasper, rare...âŻagate, jasper; d RR siding of ClayâŻagate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area depositsâŻSiderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...depositsâŻSiderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mineâŻpyritized gastropods |
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