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| 镇江下蜀土剖面的化学风化强度与元素迁移特征 | |
| 引用本文： | 陈英勇,李徐生,韩志勇,杨守业,王永波,杨达源.镇江下蜀土剖面的化学风化强度与元素迁移特征[J].地理学报(英文版),2008,18(3):341-352. |
| 作者姓名： | 陈英勇 李徐生 韩志勇 杨守业 王永波 杨达源 |
| 作者单位： | [1]School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China [2]State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi＇an 710075 China [3]State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
| 基金项目： | 国家自然科学基金，Open Foundation of State Key Laboratory of Loess and Quaternary Geology，Experimental Foundation of Nanjing University |
| 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 weathering.It 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 enriched.The 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 K.Except the elements Sr and Ga,other trace elements such as Th,Ba,Cu,Zn,Co,Ni,Cr and V were enriched.It 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 Pleistocene.At the end of the middle Pleistocene,it became dry and cool.At the early stage of the Late Pleistocene,the paleoclimate became warm and wet again.As a whole,the paleoclimate generally became drier and cooler in this region from the beginning of the middle Pleistocene. |
| 关 键 词： | 镇江 下蜀土剖面 化学风化强度 元素迁移 |
| 收稿时间： | 7 April 2009 |
Chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang,Jiangsu Province |
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| Yingyong?Chen,Xusheng?Li,Zhiyong?Han,Shouye?Yang,Yongbo?Wang,Dayuan?Yang.Chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang,Jiangsu Province[J].Journal of Geographical Sciences,2008,18(3):341-352. | |
| Authors: | Yingyong Chen Xusheng Li Zhiyong Han Shouye Yang Yongbo Wang Dayuan Yang |
| Institution: | 1. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China 2. 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 3. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
| Abstract: | 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 weathering. It 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 enriched. The 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 K. Except the elements Sr and Ga, other trace elements such as Th, Ba, Cu, Zn, Co, Ni, Cr and V were enriched. It 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 Pleistocene. At the end of the middle Pleistocene, it became dry and cool. At the early stage of the Late Pleistocene, the paleoclimate became warm and wet again. As a whole, the paleoclimate generally became drier and cooler in this region from the beginning of the middle Pleistocene. |
| Keywords: | Xiashu loess chemical weathering element migration Zhenjiang |
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