干旱区生态环境知识资源中心(Arid): 艾比湖湖相沉积物粒度的分维特征与环境意义

Arid

	艾比湖湖相沉积物粒度的分维特征与环境意义
其他题名	Grain-size fractal dimensions characterristics of lacustrine sediments of aiby lake and the environmental significance
	柏春广 1; 穆桂金2 ; 王建 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2002
卷号	25 期号:4 页码:336-341
中文摘要	艾比湖为一典型的内陆干旱区封闭型湖泊，其沉积和粒度是反映湖面消长和水动力条件变化的很好记录。对该湖Ash孔湖相沉积粒度分维值的研究表明：沉积物的粒度具有分形性，与传统的粒度参数相比较，分形的定量指标分维值的变化具有明显的阶段性，能很好地揭示本地区环境变化的规律性。分维研究在粒度分析中的应用为以后的环境变化研究提供了一种新的参数。
英文摘要	Aiby Lake is a typical closed lake in inland of arid area. The changes of lake surface and hydrodynamic conditions are well recorded by grain-size characteristic of lacustrine sediments. In this research we acquired a drilling core of lacustrine sediments named Ash, and its length is about 180cm, This drilling core is below current lake surface and near the shore. It is estimated that the sediments formed 300aBP. 90 sedimentary samples have been taken and the distance of two adjacent samples is 2cm or lcm. Granularity of the samples is measured and the fractal dimensions are calculated in this research. Based on the characteristics of grain-size dimensions, we can draw these conclusions: (1) The granularity of the sediments from the whole section is fractal, i.e. the distribution of the size of grains is statistically self-similarity. The mean value of fractal dimensions is 2. 3121. The curve of fractal dimension verse depth can be clearly divided into 4 parts. Every part has different change characteristics. Compared to traditional parameters of granularity, fractal dimension can better differentiate the changes of environment. (2) Fractal dimensions of sediments from this section well indicate the modern changing process of Bortala River transporting fragments to Aiby Lake. Combined with the lithology of the drilling core, the periodical changes of fractal dimension show the fundamental changing process of the river transporting ability: from strong to weak. (3) The value of fractal dimension (D) and its correlation coefficient (R) provided by fractal research to granularity of sediments present a set of new granularity index. Combined with traditional granularity parameters, the science sense of using fractal dimension in environment research is well showed by the granularity fractal research on Ash drilling core. More research should be done to understand the accurate meaning of fractal dimension changes.
中文关键词	粒度 ; 分维 ; 艾比湖 ; 湖相沉积 ; 沉积环境
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:1072693
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203180
作者单位	1.南京师范大学地理科学学院, 南京, 江苏 210097, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	柏春广,穆桂金,王建. 艾比湖湖相沉积物粒度的分维特征与环境意义[J]. 中国科学院新疆生态与地理研究所,2002,25(4):336-341.
APA	柏春广,穆桂金,&王建.(2002).艾比湖湖相沉积物粒度的分维特征与环境意义.干旱区地理,25(4),336-341.
MLA	柏春广,et al."艾比湖湖相沉积物粒度的分维特征与环境意义".干旱区地理 25.4(2002):336-341.