| 澧阳平原末次冰期-早全新世气候环境演变研究 |
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| 引用本文： | 毛龙江,莫多闻,周昆叔,郭伟民,贾耀锋,杨競红.澧阳平原末次冰期-早全新世气候环境演变研究[J].土壤通报,2010(5). |
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| 作者姓名： | 毛龙江 莫多闻 周昆叔 郭伟民 贾耀锋 杨競红 |
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| 作者单位： | 南京信息工程大学大气科学学院;北京大学城市与环境学院;中国科学院地质与地球物理研究所;湖南省文物考古研究所;北方民族大学管理学院;南京大学地球科学系; |
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| 基金项目： | 国家自然科学青年基金项目(40901012); 国家自然科学基金项目(40671016)资助; 国家科技支撑计划项目课题(2010BAK67B02); 国家重点基础研究发展计划项目(2003CB415201) |
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| 摘 要： | 通过对澧阳平原野外考察、典型剖面YC自然沉积剖面的系统采样、室内地球化学元素Li、Rb、Sr、Ba和Li/Ba、Rb/Sr比值的分析,以及沉积物年代样品的OSL和AMS14C年代测定,探讨了长江中游地区澧阳平原末次冰期-早全新世的气候环境变化过程。结果表明,MIS3阶段晚期(31.80~23.80 ka BP)暖湿期记录明显,对应的沉积物含大量黑色铁锰膜和铁锰结核,地球化学元素Li含量、Rb含量、Rb/Sr比值、Li/Ba比值出现峰值,而Sr含量、Ba含量出现低谷,表明此时期冬季风减弱,夏季风增强,降水量增大,温度上升,风化作用显著增强。澧阳平原YC剖面很好的记录了56.00~6.96 ka BP的气候环境演变过程,大致经历了冷干期(56.00~31.80 ka BP)、相对暖湿期(31.80~23.80 ka BP)、冷湿期(23.80~10.60 ka BP)、暖湿期(10.60~6.96 ka BP)4个气候变化阶段。
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| 关 键 词： | 澧阳平原 MIS3 地球化学 环境演变 |
Environmental Change Recorded by Sediments from Liyang Plain in the Middle Reaches of Yangtze River |
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| MAO Long-jiang ,MO Duo-wen ,ZHOU Kun-shu ,GUO Wei-min ,JIA Yao-feng ,YANG Jing-hong.Environmental Change Recorded by Sediments from Liyang Plain in the Middle Reaches of Yangtze River[J].Chinese Journal of Soil Science,2010(5). |
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| Authors: | MAO Long-jiang MO Duo-wen ZHOU Kun-shu GUO Wei-min JIA Yao-feng YANG Jing-hong |
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| Institution: | MAO Long-jiang 1,2,MO Duo-wen 2,ZHOU Kun-shu 3,GUO Wei-min 4,JIA Yao-feng 5,YANG Jing-hong6(1.College of Atmospheric Science,Nanjing University of Information Science & Technology,Nanjing 210044,China,2.College of Urban and Environmental Sciences,Peking University,Beijing 100871,3.Institute of Geology and Geophysics,CAS,Beijing 100029,4.Hunan Provincial Institute of Cultural Relies and Archaeology,Changsha 410008,5.North University for Nationalities,School of Management,Yinchuan 750021,Chi... |
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| Abstract: | Based on the field investigations and sampling as well as laboratory analysis of geochemistry elements(Li,Rb,Sr,Ba,Li/Ba,Rb/Sr),optically luminescence(OSL) and AMS 14C dating of natural profile in YC country in Liyang plain,this paper revealed the high-resolution climatic events from the last glacial to the earlier Holocence.The results show late period of MIS 3(31.80-23.80 ka BP)with rather warm and wet climate condition recorded by the YC profile from geochemical evidences,the sediments of the corresponde... |
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| Keywords: | Liyang Plain MIS3 Geochemistry Environmental evolution |
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