 | | Report (volume) | | Tertiary Volcanic Host Rocks, Sleeper Gold-Silver Deposit, Humboldt County, Nevada Geology and Geochemistry...Tertiary Volcanic Host Rocks, Sleeper Gold-Silver Deposit, Humboldt County, Nevada By J. Thomas Nash, William...Tertiary volcanic host rocks, Sleeper gold-silver deposit, Humboldt County, Nevada I by J. Thomas Nash, William...Gold ores-Geology-Nevada-Humboldt County. 2. Silver ores-GeologyNevada-Humboldt County. 3. Geology, St...Stratigraphic-Tertiary. 4. GeologyNevada-Humboldt County. I. Utterback, W.C. II. Trudel, Wayne S. III. |  | | Report (issue) | | and geochemistry of the Sleeper Gold-Silver Deposit, Humboldt County, Nevada an interim report By J................................................. Mining and exploration history......................................................................... Mine geology...........................................Figure 1. Location and geology setting of the Sleeper mine. Regional geology is simplified from Wilden....... 3 Figure 2. Generalized geology of the Sleeper mine area and western foothills of the Slumbering |  | | Journal (article/letter/editorial) | | compositions of traces of lead alloyed by gold, electrum and naumannite, and gangue vein minerals in bonanza...derived from mafic magmas likely related to northern Nevada rifting processes and/or to the arrival of the...variable amounts of quartz, opal, and adularia; electrum (Au-Ag alloy) and naumannite are the principal...3 Yellowstone 1.3 2.0 0.6 HS (B) Northern Nevada 'Bonanza' ores B 17 Boise Table 1. Pb Isotope...Amethyst 15 7 Sandman 8 New Alma 9 Jumbo 10 Sleeper 11 McDermitt 12 National 13 Midas 14 Ivanhoe 15 |  | | Journal (article/letter/editorial) | | Geography, Auburn University, Auburn, AL 36849, USA; E-Mail: saundja@auburn.edu; Tel.: +1-334-844-4884...sulfidation (LS) epithermal deposits in the western USA often show evidence of the former presence of nanoparticle-sized...colloids) observed to date in these ores include electrum and naumannite (Ag2Se). Here it is proposed that...the banded bonanza veins typical of many western USA epithermal deposits. Chalcopyrite is the most abundant...nanoparticles; epithermal ores; chalcopyrite; ore textures; electrum; dendrites Minerals 2012, 2 229 1. Introduction |  | | Journal (article/letter/editorial) | | gold (electrum) nanoparticles in middle Miocene bonanza epithermal ores from northern Nevada, USA James...shows that a significant amount of gold occurs as electrum nanoparticles and larger microparticles, the latter...formation and aggregation of nanoparticles, or (2) electrum nanoparticles formed from a deep magmatic fluid... Keywords Epithermal gold-silver ores . Gold (electrum) nanoparticles . SEM imaging Introduction Nanoparticles...handling: B. Lehmann * James A. Saunders 1 Auburn, AL, USA 2 Department of Geology and Environmental Earth |  | Saunders, J. A., Unger, D. L., Kamenov, G. D., Fayek, M., Hames, W. E., Utterback, W. C. (2008) Genesis of Middle Miocene Yellowstone hotspot-related bonanza epithermal AuâAg deposits, Northern Great Basin, USA. Mineralium Deposita, 43 (7) 715-734 doi:10.1007/s00126-008-0201-7 | Journal (article/letter/editorial) | | epithermal AuâAg deposits, Northern Great Basin, USA J. A. Saunders & D. L. Unger & G. D. Kamenov & M...Auburn University, 210 Petrie Hall, Auburn, AL 36849, USA e-mail: saundja@auburn.edu G. D. Kamenov Department...Williamson Hall, P.O. Box 112120, Gainesville, FL 32611, USA M. Fayek Department of Geological Sciences, University...89445, USA Present address: D. L. Unger Victoria Resources, 240 S. Rock Blvd., Reno, NV 89502, USA textures...gels) from super-highgrade banded ores from the Sleeper deposit show that oreforming solutions had ÎŽ18O |  | Saunders, James A., Mathur, Ryan, Kamenov, George D., Shimizu, Toru, Brueseke, Matthew E. (2016) New isotopic evidence bearing on bonanza (Au-Ag) epithermal ore-forming processes. Mineralium Deposita, 51 (1) 1-11 doi:10.1007/s00126-015-0623-y | Journal (article/letter/editorial) | | 36849, USA 2 Department of Geology, Juniata College, 1700 Moore Street, Huntingdon, PA 16652, USA 3 ...Williamson Hall, P.O. Box 112120, Gainesville, FL 32611, USA 4 Magma-hydrothermal deposits Research Group, Geological...Geology, Kansas State University, Manhattan, KS 66506, USA consistent with ore textures that indicate physical...map showing deposits or districts in the western USA and Japan where we recognize colloid aggregation...Cu isotope data from epithermal ores from western USA and Japan, along with well-constrained new Pb and |  | | Journal (article/letter/editorial) | | the genesis of bonanza Au-Ag ores of the Sleeper deposit, Nevada J.A. Saunders, P.A. Schoenly Department...Geology,Auburn University,Auburn, AL 3684%5305, USA Received: 29 November 1993/Accepted: 23 May 1994...composition for bonanza oreforming fluids at the Sleeper deposit was calculated by the computer program...factor in the genesis of bonanza Au-Ag ores at the Sleeper deposit. Geochemical modelling of possible ore-forming...high Au:Ag ratios as a consequence of gold-rich electrum being the principal ore mineral, they generally |  | | Journal (article/letter/editorial) | | minerals Review Formation and Aggregation of Gold (Electrum) Nanoparticles in Epithermal Ores James A. Saunders...Geosciences, Auburn University, Auburn, AL 36849, USA Department of Geology and Environmental Earth Science...Science, Miami University, Oxford, OH 45056, USA; burkeml2@miamioh.edu Correspondence: saundja@auburn.edu;... In epithermal ore-forming solutions, gold or electrum nanoparticles nucleate from supersaturated hydrothermal...also formed, and their co-deposition with gold (electrum) nanoparticles preserved the gold aggregation |  | | Journal (article/letter/editorial) | | high-grade Au-Ag-Te sample from deep in the Cresson Mine, Cripple Creek, Colorado, analyzed by Unger (2008)...in C. Electrum, which usually occurs as disseminations in the naumannite, has formed electrum-only (el)...in this single layer similar to electrum dendrites at Sleeper, Nevada (Saunders, 1994; Saunders and Schoenly...minerals, and the reevaluation of many historic mining districts that took place in the latter half of... 3. Tonopah 1, 2 4. Hog Ranch 5. Hycroft 6. Sleeper 7. National 8. Buckskin National 1, 2 1 1 1, 2 |  | | Journal (article/letter/editorial) | | CO 80401, USA; tmonecke@mines.edu FLUID INC., 1401 Wewatta St. #PH3, Denver, CO 80202, USA; fluidinc@comcast...low-sulfidation epithermal precious metal deposit in Nevada showed that colloform bands in these veins exhibit...quartz. The colloform bands contain dendrites of electrum and naumannite that must have grown in a yielding...low-sulfidation epithermal quartz veins from the Sleeper deposit in Nevada forms dendrites intergrown with fine-grained...low-sulfidation epithermal goldâsilver deposit in Nevada. Both silica deposits are composed of silica microspheres |  | | 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) | | TEXTURES IN BONANZA ORES OF THE SLEEPER DEPOSIT, HUMBOLDT COUNTY, NEVADA: EVIDENCE FOR COLLOIDS AND IMPLICATIONS...Sleeperprovidessomeusefulconstraints posit, Humboldt County, Nevada, exhibit textural on ore-formingprocesses...of the bonanzaportionsof theseveinsapparently Sleeper ores. This communicationpresentsaddiformedat depths(...HumboldtCounty, The millimeter-scalebandingin bonanzaore at Nevada,approximately 45 km northwestof WinneSleeper provides...of goldin lowergradedisseminated abundance of electrum allows for the determination of silicatextur |  | | Journal (article/letter/editorial) | | Correlations at Buckskin Mountain, National District, Humboldt County, Nevada PETER G. VIKREâ U.S. Geological Survey...Sciences and Engineering, University of Nevada, Reno, Reno, Nevada 89557 Abstract At Buckskin Mountain...Mountain (elev 2,650 m, 8,743 ft), Humboldt County, Nevada, a hydrothermal system, imposed on a middle Miocene...BUCKSKIN MOUNTAIN in the National district, Humboldt County, Nevada, altered and mineralized volcanic...combined to reveal much of the hydrothermal system; mine workings and exploration drill holes provide additional |  | | Journal (article/letter/editorial) | | assemblage include deposits in the Midas (Ken Snyder), Sleeper, DeLamar, Mule Canyon, Buckhorn, National, Hog...showed that lowsulfidation deposits in northern Nevada could be divided into two subtypes based on their...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...Walker Lane belt from Stewart (1988). NNR = northern Nevada rift, SM = Steens Mountain. mineral assemblages |  | John, D. A., Hofstra, A. H., Fleck, R. J., Brummer, J. E., Saderholm, E. C. (2003) Geologic Setting and Genesis of the Mule Canyon Low-Sulfidation Epithermal Gold-Silver Deposit, North-Central Nevada. Economic Geology, 98 (2) 425-463 doi:10.2113/gsecongeo.98.2.425 | Journal (article/letter/editorial) | | Low-Sulfidation Epithermal Gold-Silver Deposit, North-Central Nevada DAVID A. JOHN,â U.S. Geological Survey, 345 Middlefield...Company, Yanacocha, Peru Abstract The Mule Canyon mine exploited shallow, low-sulfidation, epithermal Au-Ag...the west side of the Northern Nevada rift in northern Lander County, Nevada. Mule Canyon consists of six...marcasite veins. Ore minerals consist mostly of electrum and Ag sulfide and selenide minerals, with minor...fluids resulting from sulfidation reactions. Later electrum and Ag selenide precipitation in open spaces occurred |  | | Journal (article/letter/editorial) | | Library] at 00:24 13 August 2015 Jamestown, Tuolumne County, California FROM THE COLLECTORâS STANDPOINT it...dealing in all aspects of gold geology, metallurgy, mining, and utilization; those interested in delving deeper...silver is typically referred to as the variety electrum. In some unusual deposits, a small amount of copper...specimen was movered from Sonora Mining Corporationâs JIMestown, California, mine in December 1W. It is one...number of specimens attributed to the old âAlabama mineâ part of the open pit and, along with other spedmeas |  | Tharalson, Erik, Monecke, Thomas, Reynolds, T., Zeeck, Lauren, Pfaff, Katharina, Kelly, Nigel (2019) The Distribution of Precious Metals in High-Grade Banded Quartz Veins from Low-Sulfidation Epithermal Deposits: Constraints from ”XRF Mapping. Minerals, 9 (12) 740 doi:10.3390/min9120740 | Journal (article/letter/editorial) | | of Mines, 1516 Illinois Street, Golden, CO 80401, USA; tmonecke@mines.edu (T.M.); lzeeck@mines.edu (L.Z...80202, USA; fluidinc@comcast.net Bruker Nano Analytics, 415 N Quay Street, Kennewick, WA 99336, USA; Nigel...for colloform quartz bands containing primarily electrum or native gold, can be explained by temporal changes...deposits worldwide, including Buckskin National in Nevada [14]; Hokuryu Minerals 2019, 9, 740; doi:10.3390/min9120740...Ivanhoe in Nevada [14]; Koryu in Japan [7,12]; Kushikino in Japan [5]; and Midas in Nevada [9]. Some of |  | Tohma, Yuki, Imai, Akira, Sanematsu, Kenzo, Yonezu, Kotaro, Takahashi, Ryohei, Koyama, Masaaki, Sekine, Ryota, Duncan, Robert, Watanabe, Koichiro (2010) Characteristics and Mineralization Age of the Fukusen No. 1 Vein, Hishikari Epithermal Gold Deposits, Southern Kyushu, Japan. Resource Geology, 60 (4) 348-358 doi:10.1111/j.1751-3928.2010.00140.x | Journal (article/letter/editorial) | | University, Fukuoka, Japan, 4Hishikari Mine, Sumitomo Metal Mining Co. Ltd., Hishikari, Kagoshima, Japan...Sciences, Oregon State University, Corvallis, Oregon, USA Abstract The Fukusen No. 1 vein is located in the...silica material that is associated with ïŹne-grained electrum and sulïŹdes near the center of the vein. Pyrite... Ar/39Ar dating, adularia, colloform texture, electrum, epithermal gold deposit, Hishikari. 1. Introduction...located in southern Kyushu, Japan (Fig. 1). The mining area is immediately west of the Kakuto caldera |  | Peters, S.G., Nash, J.T., John, D.A., Spanski, G.T., King, H.D., Connors, K.A., Moring, B.C., Doebrich, J.L., McGuire, D.J., Albino, G.V., Dunn, V.C., Theodore, T.G., Ludington, S.D. (1996) Metallic mineral resources in the U.S. Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California. Open-File Report Vol. 1996 (96-712) US Geological Survey doi:10.3133/ofr96712 | Report (issue) | | Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California...Ludington3 Open-File Report 96-712 1996 1 Reno, Nevada 89557 2 Denver, Colorado 80228 3 Menlo Park, California...Canada 7 U.S. Bureau of Land Management, Winnemucca, Nevada 89445 This report is preliminary and has not been............................................. 18 Humboldt River porphyry tracL............................Study Areas and other areas in the Winnemucca District and Surprise Resource Area for which resource |  | | 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 |  | Leavitt, E. D., Spell, T. L., Goldstrand, P. M., Arehart, G. B. (2004) Geochronology of the Midas Low-Sulfidation Epithermal Gold-Silver Deposit, Elko County, Nevada. Economic Geology, 99 (8) 1665-1686 doi:10.2113/gsecongeo.99.8.1665 | Journal (article/letter/editorial) | | Low-Sulfidation Epithermal Gold-Silver Deposit, Elko County, Nevada E. D. LEAVITT,â Department of Geological Sciences...Sciences, Mail Stop 172, University of Nevada, Reno, Reno, Nevada 89557-0001 T. L. SPELL, Department of...Geoscience, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, Nevada 89154-4010 P. M. GOLDSTRAND...GOLDSTRAND, Bureau of Mining Regulation and Reclamation, 333 W. Nye Lane, Carson City, Nevada 98706 AND G. B...Geological Sciences, Mail Stop 172, University of Nevada, Reno, Reno, NV 89557-0001 Abstract The Midas |  | | 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 |  | | Journal (article/letter/editorial) | | 409â424 Geology of the Ivanhoe Hg-Au District, Northern Nevada: Influence of Miocene Volcanism, Lakes...Geological Survey, MS 176, University of Nevada, Reno, Reno, Nevada 89557-0047 Abstract The mercury-gold...mercury-gold deposits of the Ivanhoe mining district in northern Nevada formed when middle Miocene rhyolitic volcanism...west-central part of the district. Thus, although mineralization in the district took place during a span...shorter. The low-sulfidation deposits of the Ivanhoe district formed at the same time and under similar conditions | | | 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 |
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