| Theodore, Ted G., Blair, Will N., Nash, J. Thomas, McKee, E.H., Antweiler, J.C., Campbell, W.L. (1987) Geology and gold mineralization of the Gold Basin-Lost Basin mining districts, Mohave County, Arizona, with a section on K-Ar chronology of mineralization and igneous activity, and a section on implications of the compositions of lode and placer gold. Professional Paper 1361. US Geological Survey doi:10.3133/pp1361 | Report (issue) | Geology and Gold Mineralization of the Gold Basin-Lost Basin Mining Districts, Mohave County, Arizona U.S. ... GEOLOGY AND GOLD MINERALIZATION OF THE GOLD BASIN-LOST BASIN MINING DISTRICTS, MOHAVE COUNTY, ARIZONA Placer... Placer gold nugget about 1 cm wide showing gold molded partly against rounded fragment of clear vein quartz...Lost Basin mining district. Geology and Gold Mineralization of the Gold Basin-Lost Basin Mining Districts...Districts, Mohave County, Arizona By TED G. THEODORE, WILL N. BLAIR, and J. THOMAS NASH With a section | | | Report (issue) | Description of a selected deposit: The Canyon deposit (USA) ..................... 241 3.9. 3.10. 3.11. ...262 Sandstone-hosted roll-front deposits in the USA ................................................... Description of a selected deposit: The Denison mine deposit (Canada) ....... 304 Surficial deposits...partial melting, such as pegmatites (Bancroft district and Charlebois Lake, Canada); (b) Disseminations...Zaire); Jachymov (former Czechoslovakia); Limousin district (France)); (ii) Deposits associated with âoldâ | | | Book | individual deposits or districts. (in brackets country, district, deposit reviewed): Adamek P. (Scandinavia), Adams...Africa, Namibia), Chenoweth W. (Colorado Plateau, USA), Coste A. (Limousin, France), Cuney M. (granites...Grauch R (western USA), Gautier A. (breccia pipe deposits, USA), Halladay Ch.R (eastern USA), Harshman E.N...N. (Wyoming Basins, USA), Hruby J. (CSFR), Kolb S. (Bavaria, W-Germany), Krol W. (Eastern Europe), Matos... N.M., USA), Smith RB. (South Texas, USA), Tan H.B. (Canada), Thamm J. (Colorado Plateau, USA), Tauchid | | | Report (issue) | . 37 2.4.2. Geologic setting of Witwatersrand district, South Africa..................... 38 2.4.3. Ore...Ore geometry and metallogenesis of Witwatersrand district, South Africa...................................Uranium resources and production in Witwatersrand basin................. 39 Vein type (granite related U................. 56 2.10.2. Geologic setting of Arizona strip............................................56 2.10.3. Ore geometry and metallogenesis of Arizona strip .............................. 56 2.10.4 | | | Report (issue) | Ontario..............................45 Bancroft district................................................................................61 Beaverlodge district.............................................61...Saskatchewan.............53 22. Geology of the Rossing mine area...............................55 iii Illustrations...cross section of Verna and Fay orebodies, Eldorado mine...................................................temperature and & 0 in hydrothermal fluids, Fay mine................................................ | | | Journal (article/letter/editorial) | Carboniferous continental arc setting, Pataz gold-mining district, northern PeruâW.K. Witt, S.G. Hagemann...Multiple methods for regional- to mine-scale targeting, Pataz gold field, northern PeruâW.K. Witt, S...overview of gold systems in UgandaâC. Nyakecho and S.G. Hagemann Paleoproterozoic stratigraphy and gold mineralisation...alteration evidence for two gold mineralisation events at the New Celebration gold deposits in Western AustraliaâS...magnetite-rich iron ore at the Matthew Ridge prospect, Jack Hills greenstone belt, Yilgarn cratonâA. Maskell, P. Duuring | | | Journal (article/letter/editorial) | 2014 Available online 11 March 2014 Keywords: Episyenite Quartz dissolution Bohus granite, ďŹuid inclusions...isotopes Shield brines a b s t r a c t A number of episyenite occurrences within the Neoproterozoic Bohus granite...Oslo Rift (Fig.1b). Scattered occurrences of episyenite are found in the southern part of the granite...includes at least three discrete, but very irregular episyenite bodies. A few minor left-lateral faults inďŹlled...comprises six discrete, subsurface bodies of episyenite, discovered at the Fjällbacka hot dry rock (HDR) | | Scaillet, S., Cheilletz, A., Cuney, M., Farrar, E., Archibald, D.A. (1996) Cooling pattern and mineralization history of the Saint Sylvestre and western Marche leucogranite pluton, French Massif Central: I. 40Ar/39Ar isotopic constraints. Geochimica et Cosmochimica Acta, 60 (23) 4653-4671 doi:10.1016/s0016-7037(96)00291-8 | Journal (article/letter/editorial) | CopyrightŠ 1996 ElsevierScienceLtd Printed in the USA. All rights reserved 0016-7037/96 $15.00 + .00 Pergamon...(namely, the magmatic differentiation and the episyenite-forming event) have long proved difficult to...This is especially true for the hydrothermal episyenite-forming event whose pivotal role between the...pluton in the temperature range for Ar retention in white micas. The paper emphasizes the thermochronologic...western part of the Saint Sylvestre unit (yrtype, U-mine area), (2) eastern part of the Saint Sylvestre unit | | | Report (issue) | deposit is discovered, a mine is developed and U extracted by a variety of mining techniques, depending...occurrence. Most classifications by the IAEA and major U mining companies are similar and involve between 12 and...uraninite. Major deposits occur in the Athabasca Basin in Canada and the Alligator River region of Australia... the Paterson Basin in Western Australia (McKay & Miezitis 2001) and the Thelon Basin in 6 300000...extensional basins Rift/back arc basins Arc/Marginal Basin Alkaline complexes Rift/back arc basins Intracratonic | | Patrier, P., Beaufort, D., Bril, H., Bonhomme, M., Fouillac, A. M., Aumatre, R. (1997) Alteration-mineralization at the Bernardan U deposit (Western Marche, France); the contribution of alteration petrology and crystal chemistry of secondary phases to a new genetic model. Economic Geology, 92 (4) 448-467 doi:10.2113/gsecongeo.92.4.448 | Journal (article/letter/editorial) | conditions of the alteration stages uraniferous district, presently minedbytheSoeiâ˘tâ˘desMines The physieoehemieal...Fâ˘G.1. Geologic sketchmapof theBernardan (LB) district. 450 PATRIER ET AL. to a suiteof synkinematic...autuniteandironoxides, U mineralization isdoselylinkedto episyenite bodiesthat m belowgroundlevel)composed composed...rockchipsof episyenites were moredensetowardthe episyenite bodies.Theyareoriented collected fromseveral...B42 i I 12285D J27 G67C9 PSLJ90D â˘P14/76 Mining Galery; Borehole Mineralized epiyenitic columns | | | Journal (issue) | Heierman collection. Illinois- Kentucky Fluorspar District Symposium by the Friends of Mineralogy (Midwest...the closing of the Illinois-Kentucky fluorspar district that I organized at Indiana University Southeast...believed having a similar program in the fluorspar district would be ideal. However, the logistics behind...this year. In previous visits to the fluorspar district, I had made contact with Bill Frazer, the owner...Yen. Quy Chau. northern Vietnam: Chumar-Ruyil district. 1epal; Jegdalek. Afghanistan: and easLem Pamir | | | Report (issue) | closely comparable to the S-type model of Chappel and White ( l 974), is the implied existence of crustal metallogenic...principal objectives of this study is to deter mine the extent to which the different models reflect...important, mining epoch in the eighteenth and nineteenth centuries, mainly for Sb. Exploration and mining were...world's major uranium producing areas and the main gold producer of Western Europe. It is also mined for...Massif provide evi dence of fonner widespread mining activity over many centuries. During the last twenty | | | Journal (article/letter/editorial) | I B U T I O N OF THE 238U SERIES IN THE PENY EPISYENITE (NW Massif Central - FRANCE) AHAMDACH N.*, PAGEL...study were collected from the uranium-mineralized episyenite of PENY (NW Massif Central, FRANCE), in distinguishing...grey-green pyrite + kaolinite bearing zone; (3) white K-phyllite rich zone(kaolinite absent). Samples... Samples 1 and 40 originated from a dark red episyenite, rich in iron oxyhydroxides, which confirms this...i grey-green pyrite:I:kaolinite bearing zone ⢠white K-phyllite rich zone i sample characterized by abundant | | | Report (issue) | RgueĂŻbat Shield, the Mauritanide Belt, and the Coastal Basin. Geologic environments permissive for eight types...................................... 2 Taoudeni Basin ...................................................................................... 4 Tindouf Basin ...................................................................................... 4 Coastal Basin ..................................................Banded iron formation BLEG Bulk leach extractable gold BGS British Geological Survey BRGM Bureau de | | | Report (issue) | RgueĂŻbat Shield, the Mauritanide Belt, and the Coastal Basin. Geologic environments permissive for eight types...................................... 2 Taoudeni Basin ...................................................................................... 4 Tindouf Basin ...................................................................................... 4 Coastal Basin ..................................................Banded iron formation BLEG Bulk leach extractable gold BGS British Geological Survey BRGM Bureau de | | | Journal (article/letter/editorial) | western Moravia, Czech Republic. Pale brownish to white âkeroliteâ (Mg2.77â2.79Al0.09â010Fe0.04Si4.05â4...quartz, âkeroliteâ, replacement, desilication, episyenite, contamination, pegmatite, serpentinite, VÄĹžnĂĄ...various granitic rocks leading to the formation of episyenite, results from a process of rock interaction with...tectonic stresses. In general, the formation of episyenite from a granite and desilication in granitic pegmatites...1992). This process, similar to the process of episyenite formation in granites, is documented by replacement | | | Report (issue) | 82. Porphyritic quartz monzonite of the Midnite mine, which I interpret to be a two-mica granitic rock...Cretaceous porphyritic quartz monzonite of the Midnite mine; (2) Cretaceous muscovite quartz monzonite east...veins, as at the Daybreak mine; contact zone deposits, as at the Midnite mine; and basal-type sandstone...sandstone deposits, as at the Sherwood mine. The fifth type is Rdssing-type deposits for which the high-grade...metamorphic terrane of the Kettle River Range, Ferry County, seems favorable, if sufficient volume of low-tenor | | | Report (issue) | of the earth science community, particularly the mining and petroleum industries, and will foster closer...distribution of Bacillus cereus near subsurface gold deposits ..... Nancy L. Parduhn, John R. Watterson...mineralization in the southern Toquima Range, Nye County, Nevada .............. .Daniel R. Shawe -Session...Development of disseminated gold deposits of Cortez, Horse Canyon, and Gold Acres, Nevada, at the end stage...geochemistry of wall-rock alteration, ThompsonTemperly mine, southwest Wisconsin. . . .Joseph R. 33 Hatch, Allen | | | Report (volume) | Miocene sedimentary rocks of the Espanola basin, Santa Fe County, New Mexico, by Glen A. Izett and C. W...Nevada are Late Cretaceous in age, by Donald E. Lee, JohnS. Stacey, and Lynn B. Fischer 31 E. Geochronology...Geochronology of basement granite, Stephenson County, Illinois, by ZellE. Peterman, S. S. Goldich, Lynn B...fission-track age for the Bull Domingo boulder pipe, Custer County, Colorado, by W. N. Sharp and C. W. Naeser 77 ...compositions of anorogenic granite from Stephenson County, Illinois, by T. Kurtis Kyser 139 99 Contents | | | Book | Netherlands. Special regulations for readers in the USA â This publication has been registered with the Copyright...made in the USA. All other copyright questions, including photocopying outside of the USA, should be referred...J â I p r e s e n t l i m i t of 1 underground mining â â 1 1 â˘H CO CO cd â˘H cd \ i 4-1 â˘H c ...sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best...granodiorite composed of white, creamy or greenish plagioclase; creamy to pink or also white potash feldspar; | | | Report (issue) | Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, USA, phone (978) 750-8400, http://www.copyright.com (include...CIP Cover: Specimen of high-grade gold in quartz from the Oriental mine, Alleghany, California. Harold and... . . . . . . . . . . . 39 Chapter 4. California gold . . . . . . . . . . . . . . . . . . . . . . . ....Lindgren, 1895, Characteristic features of California gold-quartz veins . . . . . . . . . . . . . . . . . ... . . . 43 Commentary: J. K. BĂśhlke, Mother Lode gold . . . . . . . . . . . . . . . . . . . . . . . . | | | Book | Netherlands. Special regulations for readers in the USA â This publication has been registered w i t h the...made in the USA. A l l other copyright questions, including photocopying outside of the USA, should be...zones in which the ores were formed". E. Sherbon Hills in Geology of Australian Ore Deposits, 1953, p....u n d e r g r o u n d 1 of QJ ¡ ¡ u , Î mining 1 1 IL¡¡I _ l ~ U C > cd rH cd 3 1 "1...sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best | | | Journal (article/letter/editorial) | be correlated with the architectural elements of basin evolution mineralization of deep level to be correlated...present of mining and metallurgy of lead . . . . . . . . . . . 18.7.2. Past and present of mining and metallurgy.... . . . . . . . . . . . . . . . . . . . . . . . Gold. . . . . . . . . . . . . . . . . . . . . . . . ...and mineralogy of gold . . . . . . . . . . . . . . . . . . . . . . . 20.2. Magmatic gold deposits . . .... Structure-bound gold deposits . . . . . . . . . . . . . . . 20.4. Sedimentary gold deposits . . . . | | | Journal (article/letter/editorial) | be correlated with the architectural elements of basin evolution mineralization of deep level to be correlated...present of mining and metallurgy of lead . . . . . . . . . . . 18.7.2. Past and present of mining and metallurgy.... . . . . . . . . . . . . . . . . . . . . . . . Gold. . . . . . . . . . . . . . . . . . . . . . . . ...and mineralogy of gold . . . . . . . . . . . . . . . . . . . . . . . 20.2. Magmatic gold deposits . . .... Structure-bound gold deposits . . . . . . . . . . . . . . . 20.4. Sedimentary gold deposits . . . . | | | Report (issue) | ......................................59 3.3.4. Mine data .............................................reflected the start of mining at Cigar Lake in 2014, and China (+95%). Production from the USA decreased by 50%...RĂśssing in Namibia and the closure of the Kayelekera mine in Malawi as a result of low prevailing uranium...Country 2010 2011 2012 2013 2014 2015 Canada USA Kazakhstan Germany Australia Russian Federation South...Niger Russian Federation Namibia Uzbekistan China USA Ukraine South Africa Malawi India Brazil Czech Republic |
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