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6篇 您的检索式:作者名="A.Trentesaux"
    题名 作者 年代 出处 被引量
1南海北坡ODP1146站第四纪粘土矿物记录:洋流搬运与东亚季风演化显示文摘南海北部ODP1146站第四纪粘土矿物学分析表明,伊利石、绿泥石和高岭石含量在冰期时增高,而蒙脱石含量在间冰期时增高.蒙脱石/(伊利石+绿泥石)比率和蒙脱石丰度变化可以作为东亚季风演化的矿物学标志.在万年时间尺度上,间冰期盛行的西南表层洋流将更多的蒙脱石由南部和东部向北搬运,表现为加强的夏季风;冰期盛行的逆时针表层洋流将大量伊利石和绿泥石由台湾以及流经吕宋海峡的长江物源搬运至南海北坡,表现为强盛的冬季风.就10万年时间尺度而言,蒙脱石/(伊利石+绿泥石)比率与沉积速率的对应关系,指示2000~1200和400-0 ka期间南海北部盛行冬季风,而1200-400ka期间表现为加强的夏季风.夏季风演化的强弱与北半球夏季目射量基本呈线性关系,表明东亚季风演化的天文驱动机制.刘志飞 A.Trentesaux S.C.Clemens 汪品先 2003中国科学(D辑)2003,33,3:46
2珠江流域盆地表层沉积物的黏土矿物及其对南海沉积物的贡献显示文摘黏土矿物以其示踪洋流变化和揭示物源区陆地同时期气候变化的能力,近年来在南海东亚季风演化的研究中起到了重要作用.珠江作为南海北部陆源物质输入的重要河流之一,以往的研究还没有开展过详细的黏土矿物学工作.运用X射线衍射方法,系统地研究了珠江流域盆地(包括珠江主流、各支流和珠江口伶仃洋)表层沉积物的黏土矿物组合.结果显示,珠江流域盆地黏土矿物组合主要由高岭石(35%-65%)、绿泥石(20%~35%)和伊利石(12%~42%)组成,蒙脱石含量一般小于5%,区域分布上不具明显的差异性.但是,从珠江流域盆地到南海北部,高岭石含量持续降低,蒙脱石含量持续上升。伊利石含量也不断上升,伊利石化学指数递减,伊利石结晶度增强,这些特征都表明珠江流域盆地对南海北部黏土矿物的贡献主要是高岭石,其次是伊利石和绿泥石,基本不提供蒙脱石.研究认为。珠江对南海北部陆缘的黏土矿物贡献率最多为72%,而对北部陆坡的贡献率最多仅为15%.无论是冰期还是间冰期时期,高岭石都指示了珠江流域的机械侵蚀能力.刘志飞 C.Colin 黄维 陈忠 A.Trentesaux 陈建芳 2007科学通报2007,52,4:40
3南海南部晚第四纪东亚季风演化的粘土矿物记录显示文摘南海南部湄公河口MD01-2393孔晚第四纪190 ka以来粘土矿物和氧同位素的高分辨率分析表明, 主要粘土矿物含量表现出明显的冰期-间冰期旋回变化, 伊利石、绿泥石和高岭石含量在冰期时增高, 而蒙脱石含量在间冰期时增高. 物源分析表明, 这些粘土矿物主要来源于湄公河流域的直接输入, 其中, 伊利石和绿泥石主要来自湄公河上游变质沉积岩的机械侵蚀作用, 高岭石主要来自中游地区沉积物的再侵蚀作用, 而蒙脱石主要由中下游的偏硅酸盐土壤提供. 蒙脱 石/(伊利石+绿泥石)和蒙脱石/高岭石比值可以作为东亚季风演化的矿物学标志, 相对高的比值发生在间冰期, 指示强盛的夏季风降雨和减弱的冬季风环流; 相对低的比值对应于冰期, 指示强盛的冬季风和减弱的夏季风. 东亚季风演化的强弱与北半球夏季日射量基本呈线性关系, 表明东亚季风演化的天文驱动机制.刘志飞 C.Colin A.Trentesaux D.Blamart 2004中国科学(D辑)2004,34,3:39
4第四纪东海的海进层序和海退层序显示文摘通过对东海陆架4000km电火花单道地震资料的判读,并与位于东海外陆架的钻孔DZQ4对比,分析地震地层的特点、沉积相和沉积环境,推测形成年代,探讨第四纪东海海进层序与海退层序,以及与海面变化的响应.研究表明第四纪东海海面随着全球气候冷暖波动而升降,海面上升时,太平洋潮波对东海陆架的作用加强,北西至南东向往复潮流塑造了潮流沙脊,地震剖面显示海进层序;海面下降时,长江三角洲向海进积,地震剖面显示水下三角洲的海退层序.随着第四纪海面多次升降,东海外陆架地层的海进层序与海退层序周期性交替分布,它们与海面变化曲线存在很好的对应关系.由于东海陆架坡缓,海面数十米升降可以造成岸线在数百公里范围内进退,又由于长江的大量输沙,水下三角洲和潮流沙脊的规模都很大.自氧同位素8期以来,共发育了3期较大潮流沙脊和4期大规模的水下三角洲。刘振夏 印萍 S.Berne A.Trentesaux 庄克琳 李朝新 2001科学通报2001,46,S1:25
5Clay mineral records of East Asian monsoon evolution during late Quaternary in the southern South China Sea显示文摘High-resolution clay mineral records combined with oxygen isotopic stratigraphy over the past 190 ka during late Quaternary from core MD01-2393 off the Mekong River in the southern South China Sea are reported to reconstruct a history of East Asian monsoon evolution.The dominating clay mineral components indicate a strong glacial-interglacial cyclicity, with high glacial illite, chlorite, and kaolinite contents and high interglacial smectites content. The provenance analysis indicates the direct input of clay minerals via the Mekong River drainage basin.Illite and chlorite derived mainly from the upper reach of the Mekong River, where physical erosion of meta-sedimentary rocks is dominant. Kaolinite derived mainly from active erosion of inhered clays from reworked sediments in the middle reaches. Smectites originated mainly through bisiallitic soils in the middle to lower reaches of the Mekong River. The smectites/(illite+chlorite)and smectites/kaolinite ratios are determined as mineralogical indicators of East Asian monsoon variations. Relatively high ratios occur during interglacials and indicate strengthened summer-monsoon rainfall and weakened winter-monsoon winds; relatively lower ratios happened in glacials, indicating intensified winter monsoon and weakened summer monsoon. The evolution of the summer and winter monsoons provides an almost linear response to the summer insolation of the Northern Hemisphere, implying an astronomical forcing of the East Asian monsoon evolution.C.Colin A.Trentesaux D.Blamart 2005Science China Earth Sciences2005,48,1:13
6Quaternary transgressive and regressive depositional sequences in the East China Sea显示文摘Based on the interpretation more than 4000 km sparker single channel seismic profiles and the comparison with Borehole DZQ4 on the outer shelf of the East China Sea (ECS),the seismic sequences,sedimentary facies and paleo-sedimentary environment are studied to establish the chronology framework and discuss the Quaternary transgressive and regressive sequences of the ECS shelf as well as their response to glacio-eustatic sea-level changes.The sea level of the ECS fluctuated with global climate changes in the Quaternary.During the sea level rise,the pacific tidal wave impacted actively on the ECS continental shelf and the reciprocating tidal currents in NW-SE direction formed tidal sand ridges,which represent large transgressive deposits visible on the seismic profiles.In response to sea level fall,the Yangtze River deltas prograded seaward and built massive subaqueous deltas to form regressive sequences on the seismic profiles.Alternative transgression and regression sequences were vertically distributed on the ECS shelf with the frequent eustacy in the Quaternary.The gentle slope of the ECS shelf makes it possible for the coastline to migrate hundreds of kilometers forth and back on the shelf because of tens of meters sea level changes,in the meanwhile,the Yangtze River discharged large amounts of sediments into the ECS resulting in large-scale subaqueous deltas and tidal sand ridges.There have developed 3 stages of tidal sand ridges and 4 stages of deltas on the ECS shelf since oxygen isotope stage 8.LIUZhenxia YINPing XIONGYingqian S.Beme A.Trentesaux LIChaoxin 2003Chinese Science Bulletin2003,48,B06:6
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