水土保持通报2012，Vol.32Issue(1)：161-164,4.
塔里木河干流古河道表层沉积物粒度特征及其意义
Grain Size Characteristics and Their Significance for Surface Sediment of Paleochannels Along Main Stream of Tarim River
摘要
Abstract
Historically,many paleochannels formed along the current main stream of Tarim River due to frequent migrations.Research on the grain size characteristics in surface sediment of the paleochannels is helpful to determine the sedimentary environments and hydrodynamic conditions during the surface sediment formation.Through systematic samplings and grain size analysis for surface sediment of the paleochannels,we find that：（1） silt is the dominated grain fraction in surface sediment of paleochannels and the secondary grain composition is obviously different between the south and north paleochannels along the current main stream;（2） the grain size for surface sediment of the paleochannels is smaller than that for surface soils in the floodplain of Tarim River,which suggests that hydrodynamics was relatively weak in the late period of paleochannels formation;（3） there are eolian sand layers in surface sediment of some paleochannels on the south bank of Tarim River,which implies that the sedimentary environments were influenced concurrently by wind and water.关键词
塔里木河/古河道表层沉积物/粒度Key words
Tarim River/surface sediment in paleochannel/grain size分类
天文与地球科学引用本文复制引用
李开封,穆桂金,徐立帅,潘光耀..塔里木河干流古河道表层沉积物粒度特征及其意义[J].水土保持通报,2012,32(1):161-164,4.基金项目
国家科技支撑计划“南疆三地州生态环境整治技术集成与应用推广模式开发” （）
