干旱区生态环境知识资源中心(Arid): 敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境

Arid

	敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境
其他题名	Topsoil Grain Size Distribution and Its Sedimentary Environment in Desert-oasis Transitional Zone of Dunhuang City
	张余; 张克存; 安志山; 蔡迪文
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2017
卷号	37 期号:4 页码:69-73
中文摘要	[目的]探究敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境,为敦煌沙漠绿洲过渡带的生态恢复以及有效控制风沙灾害提供必要的理论依据。[方法]运用对角线法对敦煌沙漠绿洲过渡带地表沉积物进行采样,采用矩值法计算粒度参数,分析其粒度空间分布特征以及沉积环境。[结果](1)研究区地表沉积物粒级极粗砂和极细砂含量较少,沙漠和绿洲分别以粗砂和细砂为主,过渡带以中砂为主,沉积物粒径自沙漠到绿洲呈现明显减小的趋势;(2)3条样带的分选性都较好,相比而言,沙漠的分选性最好,过渡带次之,绿洲最差;(3)偏态除绿洲属于正偏外,沙漠和过渡带都属于近对称分布,频率曲线峰型都是平顶峰,说明不同沉积物粒级对风力作用响应的差异性。[结论]敦煌绿洲的沙以风成环境为主,鸣沙山主要为河湖沙或河流冲积沙,过渡带混合有风成沙和河湖或河流冲积沙。
英文摘要	[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.
中文关键词	敦煌 ; 沙漠绿洲过渡带 ; 粒度特征 ; 沉积环境
英文关键词	Dunhuang City desert-oasis transitional zone characteristics of grain size sedimentary environment
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6067036
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236644
作者单位	中国科学院西北生态环境资源研究院敦煌戈壁荒漠生态与环境研究站, 中国科学院沙漠与沙漠化重点实验室;;甘肃省风沙灾害防治工程技术研究中心, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张余,张克存,安志山,等. 敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境[J],2017,37(4):69-73.
APA	张余,张克存,安志山,&蔡迪文.(2017).敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境.水土保持通报,37(4),69-73.
MLA	张余,et al."敦煌沙漠绿洲过渡带地表沉积物粒度特征及沉积环境".水土保持通报 37.4(2017):69-73.