| 黄土高原朝那剖面风尘堆积序列磁化率的古环境意义 |
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| 引用本文： | 李传想,宋友桂.黄土高原朝那剖面风尘堆积序列磁化率的古环境意义[J].东华理工大学学报（自然科学版）,2011(1):33-40. |
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| 作者姓名： | 李传想 宋友桂 |
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| 作者单位： | 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室;中国科学院研究生院 |
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| 基金项目： | 国家自然科学基金(40772116,409772230);国家重点基础规划研究项目973项目(2010CB833406) |
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| 摘 要： | 黄土高原中部连续的风尘堆积黄土-红粘土序列,蕴含着东亚季风演化与高原隆升等重要的古气候与构造信息.结合已有的古地磁年代,根据磁化率的变化特征对黄土高原中部朝那黄土-红粘土剖面记录的古环境变化进行了划分,共划分I(8.1～5.6 MaBP)东亚季风的初显期、Ⅱ(5.6～4.8 MaBP)东亚夏季风开始增强期、Ⅲ(4.8～...
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| 关 键 词： | 黄土-红粘土 朝那剖面 磁化率 古气候 东亚季风 |
The Paleoenvironmental Significance of Magnetic Susceptibility in the Eolian Deposits Sequence at the Chaona Section on the Loess Plateau |
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| LI Chuan-xiang,SONG You-gui.The Paleoenvironmental Significance of Magnetic Susceptibility in the Eolian Deposits Sequence at the Chaona Section on the Loess Plateau[J].Journal of East China Institute of Technology(Natural Science Edition),2011(1):33-40. |
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| Authors: | LI Chuan-xiang SONG You-gui |
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| Institution: | 1(1.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an,SX 710075,China;2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | The continuous eolian deposits of loess-red clay sequence in the central Loess Plateau contains the climatic and tectonic information about the evolution of the East Asian Monsoon and the uplift of the Qinghai-Tibet plateau.Based on the magnetic susceptibility curves,the paleoenvironmental stages of the Chaona loess-red clay section combining with the existing paleomagnetic age are divided.There are seven stages divided,as follows:I(8.1-5.6 MaBP) the period of East Asian Monsoon beginning to appear;II(5.6-4.8 MaBP) the period of East Asian Monsoon beginning to strengthen;III(4.8-2.8 MaBP)the period of the uplift of the Qinghai-Tibet Plateau and the reinforcement of the East Asian Monsoon;IV(2.8-2.6 MaBP)the period of climatic transition、V(2.6-1.2 MaBP) the period of the weak East Asian Monsoon;VI(1.2-0.62 MaBP)the period of the enhancement of the East Asian Monsoon;Ⅶ(<0.62 MaBP) the period of the peak of East Asian Monsoon.Compared them with the global ice volume and the insolation and the possible mechanisms of evolution of the various stages are discussed. |
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| Keywords: | Loess-red clay sequence Chaona section magnetic susceptibility record paleoclimatic significance East Asian Monsoon |
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