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10篇 您的检索式:作者名="MEFFRE Sebastien"
    题名 作者 年代 出处 被引量
1安徽庐枞(庐江-枞阳)盆地火山岩的年代学及其意义显示文摘庐枞盆地是长江中下游地区最重要的火山岩盆地之一,发育有龙门院、砖桥、双庙和浮山4组以橄榄安粗岩系为特征的火山岩地层.通过对4组火山岩中熔岩的锆石LA-ICPMS同位素定年,得到各组火山岩形成的时间分别为:龙门院组(134.8±1.8)Ma、砖桥组(134.1±1.6)Ma、双庙组(130.5±0.8)Ma和浮山组(127.1±1.2)Ma.庐枞盆地内火山岩皆形成于早白垩世,火山岩浆活动发生的起止时间约为135~127Ma,持续时间在8~10Ma左右.包括庐枞盆地在内的长江中下游地区各火山岩盆地均不存在侏罗纪火山岩浆活动.研究结果为进一步探讨和认识长江中下游及中国东部中生代构造-岩浆-成矿作用提供了新的年代学成果.周涛发 范裕 袁峰 陆三明 尚世贵 David Cooke Sebastien Meffre 赵国春 2008中国科学(D辑)2008,38,11:131
2新疆西准噶尔地区塔斯特岩体锆石LA-ICPMS年龄及其意义显示文摘西准噶尔萨吾尔地区地处新疆阿勒泰地区吉木乃县及塔城地区和丰县。酸性侵入岩在区内较发育,其研究对于准噶尔地区后碰撞构造-岩浆演化时限的厘定具有重要的意义。塔斯特岩体是萨吾尔地区重要的复式花岗岩体,与区内铜、金矿化关系密切。塔斯特岩体锆石 LA—ICPMS 年龄为337±4Ma(1σ),形成于早石炭世。结合已有的地球化学特征研究,这一年龄显示西准噶尔地区在早石炭世已处于后碰撞环境。本文获得的塔斯特岩体成岩年龄是目前在准噶尔地区获得的最老的后碰撞花岗岩锆石 U—Pb 年龄之一,为准噶尔地区后碰撞构造-岩浆演化时限的厘定提供了新的证据。范裕 周涛发 袁峰 谭绿贵 David COOKE Sebastien MEFFRE 杨文平 何立新 2007岩石学报2007,23,8:41
3Geochronology of the volcanic rocks in the Lu-Zong basin and its significance显示文摘The Lu-Zong (Lujiang-Zongyang) basin is one of the most important volcanic basins in the middle and lower reaches of the Yangtze River area, China. It comprises four shoshonitic volcanic units, which are, in an ascending order, the Longmenyuan, Zhuanqiao, Shuangmiao and Fushan Groups. The LA-ICP MS U-Pb zircon ages of the four units are: 134.8±1.8 Ma for the Longmenyuan Group, 134.1±1.6 Ma for the Zhuanqiao Group, 130.5±0.8 Ma for the Shuangmiao Group, and 127.1±1.2 Ma for the Fushan Group. The results indicate that all volcanic rocks in the Lu-Zong basin were formed in the Early Cretaceous from about 135 Ma to 127 Ma, lasting 8-10 Ma. There were no Jurassic volcanic activities in all the volcanic basins including the Lu-Zong basin in the middle and lower reaches of the Yangtze River area. This work has provided new chronological results for the further study and understanding of the tec- tonic, magmatic and metallogenic processes of eastern China in the Mesozoic.David COOKE Sebastien MEFFRE 2008Science China Earth Sciences2008,51,10:13
4安徽西冲钼矿床细粒花岗岩的岩石定年、岩石化学及与成矿的关系研究显示文摘西冲钼矿是大别成矿带东段近年新发现的斑岩型钼-多金属矿床,其矿床学和矿床地球化学研究少见报导。该研究成果丰富了我国斑岩-矽卡岩型钼钨-多金属矿床研究成果,同时对指导区域找矿具有一定意义。本文在详细的野外地质调研基础上,对大别成矿带西冲钼矿区出露的主要岩石单元、矿化和蚀变特征、细粒花岗岩的岩石学、岩石化学和成岩年代学进行了系统的研究。结果表明,矿区出露的主要侵入岩单元由老至新依次为:石英二长岩、细粒花岗岩(130.8±1.1Ma)及双峰式脉岩组合(131.9±1.4Ma和131.3±1.6Ma),其均为燕山期岩浆活动产物,产于华北与扬子陆块拼合后的陆内环境。矿化类型以脉状、网脉状和浸染状为主,为一斑岩型钼-多金属矿床。矿区蚀变发育,包括黑云母-磁铁矿化、钾长石化、硅化、石英-绢云母化、石英-绿帘石化、绿泥石-碳酸盐化和泥化,且空间上具有一定的分带规律。矿区已知矿化、蚀变及Cu-Mo化探异常的空间展布与细粒花岗岩关系密切,且细粒花岗岩中具有高的Mo含量,表明该矿床的形成主要与细粒花岗岩有关。岩石化学结果表明,细粒花岗岩属过铝质-准铝质、高钾钙碱性-钾玄质过渡岩石,锆石U-Pb年龄与双峰式脉岩的在误差范围内一致,表明其均形成于大别造山带大规模伸展背景。谢玉玲 李腊梅 郭翔 MEFFRE Sebastien CHANG ZhaoShan 张健 姚羽 王爱国 2015岩石学报2015,31,7:7
5东天山自然铜矿化区火山岩的年代学显示文摘 近年来在东天山十里坡、黑龙峰、长城山、东尖峰一带相继发现了与玄武岩有关的自然铜矿化这一新矿化类型(董连慧等,2003),并已有一定程度的研究(崔彬等,2006;袁峰等,2006,2007).关于自然铜的成矿作用,一般认为与溢流玄武岩关系密切(朱炳泉,2003;White和Mck-enzie,1995),玄武岩的形成时代、形成机制、岩浆演化等对自然铜的成矿作用有重要的制约(Zhu等,2003;Puschner,2001).本文重点对东天山自然铜矿化区进行火山岩年代学研究.……袁峰 周涛发 范裕 谭绿贵 David Cooke Sebastien Meffre 王庆民 王卫江 2007矿物学报2007,,z1:1
6Evolution of calc-alkaline to alkaline magmatism through Carboniferous convergence to Permian transcurrent tectonics, western Chinese Tianshan显示文摘Bo Wang Dominique Cluzel Liangshu Shu Michel Faure Jacques Charvet Yan Chen Sebastien Meffre Koen Jong 2009International Journal of Earth Sciences2009,,6:1
7The configuration of Greater Gondwana—Evidence from LA ICPMS, U–Pb geochronology of detrital zircons from the Palaeozoic and Mesozoic of Southeast Asia and China显示文摘Clive Burrett Khin Zaw Sebastien Meffre Chun Kit Lai Somboon Khositanont Pol Chaodumrong Mongkol Udchachon Samuel Ekins Jacqueline Halpin 2014Gondwana Research2014,,1:1
8Linking gold mineralization to regional-scale drivers of mineral systems using in situ U-Pb geochronology and pyrite LA-ICP-MS element mapping显示文摘Proterozoic orogens commonly host a range of hydrothermal ores that form in diverse tectonic settings at different times. However, the link between mineralization and the regional-scale tectonothermal evolution of orogens is usually not well understood, especially in areas subject to multiple hydrothermal events.Regional-scale drivers for mineral systems vary between the different classes of hydrothermal ore, but all involve an energy source and a fluid pathway to focus mineralizing fluids into the upper crust. The Mount Olympus gold deposit in the Proterozoic Capricorn Orogen of Western Australia, was regarded as an orogenic gold deposit that formed at ca. 1738 Ma during the assembly of Proterozoic Australia. However,the trace element chemistry of the pyrite crystals closely resembles those of the Carlin deposits of Nevada,with rims that display solid solution gold accompanied by elevated As, Cu, Sb, Hg, and Tl, surrounding gold-poor cores. New SHRIMP UeP b dating of xenotime intergrown with auriferous pyrite and ore-stage alteration minerals provided a weighted mean^(207) Pb*/^(206) Pb* date of 1769 ± 5 Ma, interpreted as the age of gold mineralization. This was followed by two discrete episodes of hydrothermal alteration at 1727 ± 7 Ma and 1673 ± 8 Ma. The three ages are linked to multiple reactivation of the crustal-scale Nanjilgardy Fault during repeated episodes of intracratonic reworking. The regional-scale drivers for Carlin-like gold mineralization at Mount Olympus are related to a change in tectonic regime during the final stages of the intracratonic 1820 -1770 Ma Capricorn Orogeny. Our results suggest that substantial sized Carlin-like gold deposits can form in an intracratonic setting during regional-scale crustal reworking.Imogen O.H.Fielding Simon P.Johnson Sebastien Meffre Jianwei Zi Stephen Sheppard Ross R.Large Birger Rasmusseng 2019Geoscience Frontiers2019,10,1:1
9Evolution of calc-alkaline to alkaline magmatism through Carboniferous convergence to Permian transcurrent tectonics, western Chinese Tianshan显示文摘Bo Wang Dominique Cluzel Liangshu Shu Michel Faure Jacques Charvet Yan Chen Sebastien Meffre Koen Jong 2009International Journal of Earth Sciences2009,,6:1
10Characterization of Galena and Vein Paragenesis in the Penjom Gold Mine,Malaysia:Trace Elements,Lead Isotope Study and Relationship to Gold Mineralization Episodes显示文摘The Penjom Gold Mine is located 30 km from the Bentong-Raub Suture at the western boundary of the Central Belt in Peninsular Malaysia. Gold mineralization hosted within the vein system is associated with pyrite, arsenopyrite, and minor base metals including galena. Trace element and lead isotope analysis was undertaken on nine samples that represent two stages of galena formed during two tectonic events. Both the Pb isotopes and the trace elements show that the first stage galena within the mineralized areas at the footwall has different geochemical characteristics compared with galena in non mineralized areas in the hanging wall, suggesting that galena crystallized from two different ore fluids and probably at two different times. Higher Te, Se and Bi in the galena from the mineralized area may indicate hydrothermal fluids that migrate through the structural conduit and leached out the metal along the pathway that consist of dominant carbonaceous unit. The Pb isotopic ratio composition are transitional between the bulk crustal growth and an upper crustal growth curve, indicating that derivation was from arc rocks associated with continental crust or a crustal source that includes arc volcanic and old continental sedimentary rocks.Zakaria ENDUT NG Tham Fatt Jasmi Hafiz ABDUL AZIZ Sebastien MEFFRE Charles MAKOUNDI 2015Acta Geologica Sinica(English Edition)2015,89,6:1
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