An 8.1Ma calcite record of Asian summer monsoon evolution on the Chinese central Loess Plateau

作     者：CHEN XiuLing FANG XiaoMin AN ZhiSheng HAN WenXia WANG Xin BAI Yan HONG Ye 

作者机构：Key Laboratory of Western China’s Environmental Systems(MOE)and College of Resources and EnvironmentLanzhou Univer-sityLanzhou 730000China Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100085China State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710075China College of Atmospheric ScienceLanzhou UniversityLanzhou 730000China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2007年第50卷第3期

页      面：392-403页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：NSFC Group Funds (Grant Nos. 40421101 and 40334038) the Na-tional Key Basic Research Project on the Tibetan Plateau (Grant No. 2005CB422000) the Hundred Talents Project of the Chinese Academy of Sciences (Renjiaozi 05) 

主　　题：carbonates calcite evolution of Asian summer monsoon red clay-loess Chinese Loess Plateau 

摘      要：Carbonates in loess-red clay sequences consist mainly of calcite and dolomite. The EDTA analysis of carbonates in different size fractions and magnetic susceptibility reveal that calcite is a sensitive index of summer monsoon. The chemical analysis of carbonates and calcite from an 8.1 Ma loess-red clay sequence at Chaona on the Chinese central Loess Plateau shows that the evolution of the Asian summer monsoon experienced four stages, namely 8.1―5.5 Ma, 5.5―2.8 Ma, 2.8―1.5 Ma and 1.5―0 Ma, with increasing intensification and fluctuation, suggesting a possible combining impacts of uplift of the Tibetan Plateau and global changes on the Asian summer monsoon.