水土保持通报2017，Vol.37Issue(4)：69-73,5.DOI:10.13961/j.cnki.stbctb.2017.04.012
敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境
Topsoil Grain Size Distribution and Its Sedimentary Environment in Desert-oasis Transitional Zone of Dunhuang City
摘要
Abstract
[Objective] Exploring the topsoil grain size distribution and its sedimentary environment,to provide theoretical bases for ecological restoration and effective sand disasters control in the Dunhuang desertoasis transitional zone.[Methods] Surface sediments were sampled by diagonal method in Dunhuang desertoasis transitional zone,Grain size parameters were calculated by moment method.The spatial distribution and sedimentary environment of grain size were analyzed.[Results] (1) The contents of extremely coarse sand and extremely fine sand were both low in the research area.Desert and oasis were mainly composed of coarse sand and fine sand,and the transition zone was dominated by mid-sand.The grain size decreased from desert to oasis.(2) The sorting of the 3 sampling belt transects performed all better,among which,the desert was the best,followed by the transition zone,the oasis was the worst.(3) As for skewness,desert and transition zone were nearly symmetrical distribution,while oasis belonged to positive skewness.Kurtosis type was plat,which showed that responses of different sediment grain sizes to wind power were different.[Conclusion] The sand of oasis is dominated by aeolian environment,Mingsha mountain is mainly lacustrine or river environment,two different sedimentary sands appeared in the transitional zone.关键词
敦煌/沙漠绿洲过渡带/粒度特征/沉积环境Key words
Dunhuang City/desert-oasis transitional zone/characteristics of grain size/sedimentary environment分类
资源环境引用本文复制引用
张余,张克存,安志山,蔡迪文..敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境[J].水土保持通报,2017,37(4):69-73,5.基金项目
国家自然科学基金项目“沙漠绿洲过渡带近地表风沙动力过程研究”(41371027) （41371027）
中科院青年创新促进会项目(2014382) （2014382）
国家重点研究计划项目(2017YFC0504801) （2017YFC0504801）
