Paleosandstorm characteristics and l

Paleosandstorm characteristics and lake evolution history deduced from investigation on lacustrine sediments--The case o

Sediment cores from desert lakes serve as good records of the frequency and intensity of sandstorms in history. By multi-proxy analysis of grain-size, magnetic susceptibility, TOC and Rb/Sr ratio, the paleosandstorm characteristics and lake evolution history in Yulin Area for the past 80 years. are discussed in this article. It is revealed that Hongjiannao Lake formed in about 1928 A.D. and in its initial stage sandstorms were prevalent with three extremes taking place in 1936 A.D., 1939 A.D. and 1941 A.D.. During the expansion period of 1952―1960 A.D., inflow waters to the lake increased sharply and a lot more weathered materials were carried into the lake. The frequency and intensity of sandstorms have reduced a lot since 1960s and the "double peaks" feature of the grain-size frequency curve has changed into the "single peak" feature. Study on the catchment ecology of the lake shows that the occurrence of sandstorms has been effectively restrained by the forest plantation and water and soil conservation.

作 者： SHEN Ji WANG Yong YANG Xiangdong ZHANG Enlou YANG Bao JI Junfeng   作者单位： SHEN Ji,YANG Xiangdong,ZHANG Enlou(Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

WANG Yong(Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;Graduate School, Chinese Academy of Sciences, Beijing 100039, China)

YANG Bao(Key Laboratory of Ice and Cold Region Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China)

JI Junfeng(Institute of Surfacial Geochemistry, State Laboratory of Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210009, China) 

刊 名： 科学通报（英文版）  SCI 英文刊名： CHINESE SCIENCE BULLETIN  年，卷(期)： 2005 50(20)  分类号： P3  关键词： lacustrine sediment   paleosandstorm characteristics   lake evolution history   Hongjiannao Lake  

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