 | | 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) | | 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 |  | | 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...low-sulfidation epithermal quartz veins from the Sleeper deposit in Nevada forms dendrites intergrown with fine-grained...low-sulfidation epithermal gold–silver deposit in Nevada. Both silica deposits are composed of silica microspheres...Wairakei in general presence of smectite and minor illite/smectite is found in near-surface units. The presence |  | | Journal (article/letter/editorial) | | Volcanic rocks hosting quartz ± calcite ± adularia ± illite epithermal deposits undergo elemental mass changes...important hydrothermal minerals (e.g., adularia, illite, smectite) and alteration processes that are reflected...metal epithermal quartz ± calcite ± adularia ± illite deposits (e.g., Buchanan, 1981; White † Corresponding...Gold Company, 9670 Gateway Drive, Suite 200, Reno, Nevada 89521. 0361-0128/07/3685/923-26 et al., 1995;...for rocks surrounding epithermal deposits at Sleeper, Nevada, United States, and Mount Muro, Kalimantan |  | | Journal (article/letter/editorial) | | Correlations at Buckskin Mountain, National District, Humboldt County, Nevada PETER G. VIKRE† 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...K-feldspar + K-mica + quartz + pyrite and distal illite + chlorite + calcite + pyrite. Mixing of sinter-vein...BUCKSKIN MOUNTAIN in the National district, Humboldt County, Nevada, altered and mineralized volcanic |  | 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,† 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...e-mail, djohn@usgs.gov *Present address: Newmont Mining Corp., PO Box 388, Valmy, NV 89438. 0361-0128/01/3335/425-39...basalt-rhyolite magmatism in the Great Basin, such as Sleeper, Midas, and Buckhorn. Major differences at Mule |  | 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 |  | | 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...Western Americas such as Comstock and Tonopah, Nevada, Creede, Colorado, Fresnillo and Guanajuato, Mexico |  | | 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 |  | 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,† 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 |  | | 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.— 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 |  | | Journal (article/letter/editorial) | | 1989).The Great Au-Agdeposit,locatedin northwestern Nevada,nearthe Basinof thewesternUnitedStatesissusceptible...ficial acidsulfatealteration. CurrentAu-Ag(Hg) mining pandedandcontracted according to palcoclimatic...SpringGoldCorporation, 4650SierraMadre#813, fate alteration Reno, Nevada 89502. silicification, resulting in theleaching...fresh-water Sleeper 41'15' -tog Ranch >z Sulphur (abandoned) o ø e.> HUMBOLDT COUNTY ß-r' PERSHING...PERSHING COUNTY ... I I ;rofoot/Lewis Mine the basin 12 km north of the Crofoot-Lewismine (Garside et |  | 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 µXRF 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...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...deposit in Nevada, and the Sado Kinzan deposit in Japan. The Hokuryu deposit in the Omu mining camp of Hokkaido |  | | Report (chapter) | | activity of the Madjarovo base-precious metal ore district, eastern Rhodopes, Bulgaria PETER MARCHEV 1... Madison, WI53706, USA Abstract: The Madjarovo volcanic complex and ore district comprise alteration...al. 1997; Singer & Marchev 2000). Mining at Madjarovo ore district in Bulgaria is believed to have commenced...economy and a decrease in ore grade with depth, mining for base metals has ceased. Jambol Exploration...Madjarovo ore district because the Arda River has dissected the whole volcanic complex and ore district, exposing |  | | Journal (article/letter/editorial) | | LONG-LIVED HYDROTHERMAL SYSTEM IN THE FRESNILLO SILVER DISTRICT, MEXICO: CONSTRAINTS FROM 40Ar/39Ar GEOCHRONOLOGY...Environmental Sciences Department, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 2New...and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, New Mexico...and dikes are the youngest igneous rocks in the district. Spatial association of Tertiary volcanic rocks...sulfate alteration, and epithermal veins makes the district ideal for evaluating the temporal relations between |  | | Journal (article/letter/editorial) | | Both adularia and albite are variably replaced by illite, which, together with broadly coextensive chlorite...locally at depth in the hanging wall. Interstratified illite-smectite containing 10 to 70 percent smectite and...veins includes quartz, adularia, albite, chlorite, illite plus pyrite, and reflects formation from alkali...Introduction EPITHERMAL quartz ± calcite ± adularia ± illite deposits (Simmons et al., 2005) are important sources...g., Hishikari, Japan: Izawa et al., 1990; Sleeper, Nevada: Saunders, 1994), with giant deposits containing |  | | Report (issue) | | Mineral Resources Mount Nutt Wilderness Study Mohave County, Arizona U. S. GEOLOGICAL SURVEY BULLETIN 1 737-...of the Mount Nutt Wilderness Study Area, Mohave County, Arizona By FLOYD GRAY, ROBERT C. JACHENS, ROBERT...of the Mount Nutt wilderness study area. Mohave County, Arizona / by Floyd Gray ... [et al.]. p. cm. (U...Nutt Wilderness Study Area (AZ-020-Q24), Mohave County, Arizona. CONTENTS Summary Dl Abstract Dl Character...resources D6 Methods D6 Mining and mineral exploration history D6 Mines and prospects, mining claims and leases |  | | Journal (article/letter/editorial) | | West Java, Indonesia, and Nazareño, ShilaPaula district, southern Perú, in order to examine the spatial...collected from surface exposures and underground mine levels. The mineralogy was determined from polished...observed in the mineralized bodies cut by underground mine galleries (500, 550, 600, 650, and 690 m.a.s.l.)...minerals such as illite, kaolinite, smectite (close to montmorillonite), metahalloysite and illite-smectite interlayered...2001). Mine gallery samples (690–500 m.a.s.l) Supergene alteration is clearly developed in the mine galleries |  | Christie, A. B., Simpson, M. P., Brathwaite, R. L., Mauk, J. L., Simmons, S. F. (2007) Epithermal Au-Ag and Related Deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand. Economic Geology, 102 (5) 785-816 doi:10.2113/gsecongeo.102.5.785 | Journal (article/letter/editorial) | | The deposits are quartz ± calcite ± adularia ± illite type (Simmons et al., 2005; † Corresponding author:...minerals and vein textures. Mineral Production Mining history Alluvial gold was discovered near Coromandel...deposits, 0361-0128/98/000/000-00 $6.00 little mining activity occurred until the discovery of Au-bearing...veins in 1861 in what was to become the Kapanga mine (Fig. 2, Table 1). Prospecting elsewhere in the...major period of gold mining ended with the closure of the underground Martha mine at Waihi in 1952, although |  | Doebrich, Jeff L., Albino, G.V., Barker, C.E., Duffield, W.A., Dunn, V.C., Hanna, W.F., McFarlan, J.P., McGuire, D.J., Miller, M.S., Peters, S.G., Plouff, Donald, Raines, G.L., Sawatasky, D.L., Spanski, G.T. (1994) Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California. Open-File Report Vol. 1994 (94-712) US Geological Survey doi:10.3133/ofr94712 | Report (issue) | | MANAGEMENT'S WINNEMUCCA DISTRICT AND SURPRISE RESOURCE AREA, NORTHWEST NEVADA AND NORTHEAST CALIFORNIA...Field Office, Mackay School of Mines, University of Nevada, Reno, NV 89557-0047 2U.S. Geological Survey, Unit...Winnemucca District and Surprise Resource Area, an area covering 13.5 million acres in northwest Nevada and...impact of mine dewatering on drainage basin groundwater resources (for example, the Humboldt River drainage...part of their Resource Management Plan for the District/Resource Area or for other planning units such |  | Faure, K., Matsuhisa, Y., Metsugi, H., Mizota, C., Hayashi, S. (2002) The Hishikari Au-Ag Epithermal Deposit, Japan: Oxygen and Hydrogen Isotope Evidence in Determining the Source of Paleohydrothermal Fluids. Economic Geology, 97 (3) 481-498 doi:10.2113/gsecongeo.97.3.481 | Journal (article/letter/editorial) | | Higashi, Tsukuba 305, Japan H. METSUGI, Metal Mining Agency of Japan, 1-24-14, Toranomon, Minato-ku...Morioka 020, Japan AND S. HAYASHI‡ Department of Mining, Kyushu University, Fukuoka 812-81, Japan Abstract...sedimentary rocks are unaltered except for thin chlorite-illite selvages directly adjacent to the veins. However...intense alteration that is vertically zoned. Chlorite-illite alteration proximal to the veins grades upward...aolinite, III = quartz-smectite, IV = chlorite-illite). Hydrothermal alteration of the Shimanto Supergroup |  | Moussa, N., Boiron, M.C-, Grassineau, N.V., Asael, D., Fouquet, Y., Le Gall, B., Rolet, Joël, Etoubleau, J., Delacourt, C. (2019) Mineralogy, fluid inclusions and stable isotope study of epithermal Au-Ag-Bi-Te mineralization from the SE Afar Rift (Djibouti) Ore Geology Reviews, 111. 102916 doi:10.1016/j.oregeorev.2019.05.002 | Journal (article/letter/editorial) | | Geophysics, Yale University, New Haven, CT 06520 USA *Corresponding Author: nmoussae@gmail.com Journal:...chalcocite and goethite. Alteration minerals such as illite and chlorite are also present. Minor minerals such...minerals. In addition, the occurrence of adularia and illite indicate that the pH of these solutions was near...Environment of ore deposition in the Creede mining district, San Juan Mountains, Colorado; Part III, Progress...mesothermal quartz veins of the Cowra Creek Gold District, New South Wales, Australia. J. Geochemi. Explor |  | | Journal (article/letter/editorial) | | low-sulfidation epithermal environment. Quartz, illite, K feldspar (adularia), albite, chlorite, calcite...time, and on the periphery of the upflow zone, illite, smectite, calcite, and siderite form through hydrolitic...upflow zone (with smectite dominating at <150°C and illite dominating at >200°C); the abundance of chlorite...distribution of temperature-sensitive smectite and illite reflect the location of the upflow zone. On a local...graphite monochrometer. Additional data regarding illite-smectite occurrences of samples from Br 1 through |
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