Chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang, Jiangsu Province

作     者：CHEN Yingyong LI Xusheng HAN Zhiyong YANG Shouye WANG Yongbo YANG Dayuan CHEN Yingyong;LI Xusheng;HAN Zhiyong;YANG Shouye;WANG Yongbo;YANG Dayuan

作者机构：School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment CAS Xi＇an 710075 China State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2008年第18卷第3期

页      面：341-352页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：National Natural Science Foundation of China, No.40401006 Open Foundation of State Key Laboratory of Loess and Quaternary Geology, No.SKLLQG0304 Experimental Foundation of Nanjing University 

主　　题：Xiashu loess chemical weathering element migration Zhenjiang 

摘      要：The chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang are studied in this paper.（1）The Xiashu loess profile underwent moderate chemical *** seems that the precipitation is a more important factor than the temperature in controlling the process of the chemical weathering.（2）The major elements such as Si,K,Na,Ca,Mg,Mn and P were migrated and leached,while the elements Fe and Ti were slightly *** migration features of the major elements reveal that the Xiashu loess finished the primary process of chemical weathering characterized by leaching of Ca and Na,and almost reached the secondary process characterized by leaching of *** the elements Sr and Ga,other trace elements such as Th,Ba,Cu,Zn,Co,Ni,Cr and V were *** might be caused by both the biogeochemical process and the adsorption of trace elements by clay mineral and organic materials.（3）The difference of element migration down the Xiashu loess profile reveals that the climate was warm and wet at the early-middle stage of the middle *** the end of the middle Pleistocene,it became dry and *** the early stage of the Late Pleistocene,the paleoclimate became warm and wet *** a whole,the paleoclimate generally became drier and cooler in this region from the beginning of the middle Pleistocene.