Behaviours of REE and Other Trace Elements During Pedological Weathering-Evidence from Chemical Leaching of Loess and Palaeosol from the Luochuan Section in Central China  

作　　者：Chen Jun, Wan Hongtao, Department of Earth Sciences, Nanjing University, Nanjing, Jiangsuand Lu HuayuKey Lab. of Loess and Quaternary Geology, Chinese Academy of Sciences,Xi an, Shaanxi Liu Xinzhu 

出　　处：《Acta Geologica Sinica(English Edition)》1996年第3期290-302,共13页地质学报（英文版）

摘　　要：The chemical leaching method is used for a systematic analysis of distribution characteristics of acid-soluble and acid-insoluble REE and other trace elements from the Luochuan loess deposits. The study shows that the acid-insoluble phase in loess and palaeosol is a stable component of old aeolian dusts and is characteristic of the provenance; the acid-soluble phase is the unstable component in the weathering pedogenic process and reflects rock-forming features after accumulation of aeolian dusts. The acid-insoluble REE and acid-soluble Sr and Pb can be used as geochemical indicators respectively to trace the provenance characteristics and the weathering pedogenic process.The chemical leaching method is used for a systematic analysis of distribution characteristics of acid-soluble and acid-insoluble REE and other trace elements from the Luochuan loess deposits. The study shows that the acid-insoluble phase in loess and palaeosol is a stable component of old aeolian dusts and is characteristic of the provenance; the acid-soluble phase is the unstable component in the weathering pedogenic process and reflects rock-forming features after accumulation of aeolian dusts. The acid-insoluble REE and acid-soluble Sr and Pb can be used as geochemical indicators respectively to trace the provenance characteristics and the weathering pedogenic process.

关 键 词：chemical leaching loess and palaeosol REE geochemistry provenance characteristics weathering pedogenesis 

分 类 号：P594[天文地球—地球化学]