维普中文期刊产品整合服务
4篇 您的检索式:作者名="C.Colin"
    题名 作者 年代 出处 被引量
1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
2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
3Clay 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
4Sensitivity and specificity of third‐generation hepatitis C virus antibody detection assays: an analysis of the literature显示文摘C.Colin D.Lanoir S.Touzet L.Meyaud‐Kraemer F.Bailly C.Trepo 2003Journal of Viral Hepatitis2003,,2:1
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费