干旱区生态环境知识资源中心(Arid): 中国北方部分地区黄土、沙漠沙、湖泊、河流细粒沉积物粒度多组分分布特征研究

Arid

	中国北方部分地区黄土、沙漠沙、湖泊、河流细粒沉积物粒度多组分分布特征研究
其他题名	The Multimodal Grain-Size Distribution Characteristics of Loess,Desert,Lake and River Sediments in Some Areas of Northern China
	殷志强 1; 秦小光 1; 吴金水 2; 宁波 1
ISSN	1000-0550
出版年	2009
卷号	27 期号:2 页码:343-351
中文摘要	通过对我国北方部分地区的黄土、沙漠沙、湖泊、河流细粒沉积物的粒度多组分分布特征系统研究后总结了其粒度分布特征及组分间差异,并提出了风成、水成沉积物成因类型的判别依据.认为:1)细粒沉积物粒度一般由多个组分叠加构成,表现为多组分粒度分布特征.2)黄土粉尘粒径以<70 mum的悬浮颗粒为主,粒度由粗、中、细三个组分构成.粗粒组分含量最高,其中值粒径与源区距离呈负相关,中粒组分百分含量与源区距离呈正相关.3)沙漠沙粒度由一个极其明显的粗粒跳跃组分构成,中值粒径一般位于100～300 mum,分选性极好.4)湖泊沉积物粒度分布最多可有6个组分(中值粒径:<1 mum,2～10 mum,10～70 mum,70～150 mum,150～700 mum,>700 mum),前4个组分属悬浮组分,⑤为跳跃组分,⑥为滚动组分,分选性差.5)河流沉积物粒度分布曲线较复杂,其分布特征蕴含了水动力强弱信息.6)沙漠沙黄土与河流沙湖泊沉积物其优势组分的粒径均逐渐变细,但水成相对应组分比风成组分粒径要粗.
英文摘要	By using high-resolution laser grain size instrument Mastersizer 2000, the multimodal characteristics of grain size distribution of loess, desert, lake and river sediments are measured and carefully studied. The standard patterns and their grain size characteristics of various sediments are systemically summarized, the discrepancies of multi-modal distribution among these sediments are concluded and the comparisons of grain size multimodal distribution of them are also discussed in this paper. The major conclusions are followed: 1) The multimodal characteristic of grain size distribution is a common feature in all sediments and results from properties of transportation medium, dynamic intensity, transportation manner and other factors; 2) There are three modes in loess grain size distribution; fine, median and coarse (the median size is 700mum re-spectively) in grain size distribution of lake sediments. The former 4 modes are suspense and others are saltated and rolling. Lake sediments can be divided into three types: lake shore facies, transitional facies and central lake facies; 5) The grain size distribution of river sediments is the most complex and its consist of suspension, saltation and rolling modes. 6) The windblown depositions and aqueous sediments of predominant mode gradually decreases form sandy dunes to loess and river to lake sediments. But the grain size of modes of windblown depositions is usually finer than that of corresponding modes of aqueous sediments.
中文关键词	黄土 ; 沙漠沙 ; 湖泊 ; 河流 ; 粒度特征 ; 多组分分布
英文关键词	Loess desert lake river sediments grain size multimodal distribution characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:3568624
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223347
作者单位	1.中国科学院地质与地球物理研究所, 北京 100029, 中国; 2.海南省海洋地质调查局, 海口, 海南 570206, 中国
推荐引用方式 GB/T 7714	殷志强,秦小光,吴金水,等. 中国北方部分地区黄土、沙漠沙、湖泊、河流细粒沉积物粒度多组分分布特征研究[J],2009,27(2):343-351.
APA	殷志强,秦小光,吴金水,&宁波.(2009).中国北方部分地区黄土、沙漠沙、湖泊、河流细粒沉积物粒度多组分分布特征研究.,27(2),343-351.
MLA	殷志强,et al."中国北方部分地区黄土、沙漠沙、湖泊、河流细粒沉积物粒度多组分分布特征研究".27.2(2009):343-351.