水土保持通报2011，Vol.31Issue(6)：11-14,20,5.
民勤县固定与半固定沙丘粒度特征分析
Grain Size Characteristics of Fixed and Semi-fixed Dunes in Minqin County
摘要
Abstract
Grain size characteristics of aeolian sediments can provide lots of information about sedimentary environment and process,sediment transporting forces.This paper selected the semi-fixed and fixed dunes at Minqin County as research objects,and studied the sediment samples systematically using the grain size analysis method.The results indicated that fine sand is dominant in the semi-fixed and fixed dunes surface sediments,and the very fine sand follows;the grain size compositions of semi-fixed and fixed dunes are similar,but difference in contents of components can be detected.The mean diameters of semi-fixed and fixed dunes are 2.69 Φ and 2.66 Φ respectively with similar sorting and skewness features,showing nearly symmetrical distribution patterns when moderately sorted.The analysis of the grain size parameters showed that a quadratic polynomial relationship（R2=0.404 1） exists between the mean diameter and skewness,but insignificant linear correlation can be found among kurtosis and the mean diameter,the sorting feature,kewness show（0.550,0.496,0.356）,and the sorting feature and the mean diameter,skewness are uncorrelated.关键词
半固定沙丘/固定沙丘/粒度特征/民勤县Key words
semi-fixed dune/fixed dune/grain size characteristics/Minqin County分类
天文与地球科学引用本文复制引用
杨宁宁,董治宝,李恩菊,李继彦..民勤县固定与半固定沙丘粒度特征分析[J].水土保持通报,2011,31(6):11-14,20,5.基金项目
教育部“长江学者”特聘教授项目“腾格里沙漠科学考察项目” （）
