干旱区生态环境知识资源中心(Arid): 香山北麓末次冰期风成沉积物粒度的空间变化研究

Arid

	香山北麓末次冰期风成沉积物粒度的空间变化研究
其他题名	Study on Grain-size of the Aeolian Sediments in the Northern Fringe of Xiangshan Mountain During the Last Glacial
	徐树建; 潘保田; 胡春生; 高红山
ISSN	1005-3409
出版年	2006
卷号	13 期号:2 页码:4-6,74
中文摘要	黄土的粒度被广泛地用作气候变化特别是冬季风强度变化和沙漠范围变迁的替代性指标。对宁夏中部陇西黄土高原北缘的香山北麓从北向南的七个样点末次冰期以来风成堆积物粒度的系统分析表明．在末次冰期中．影响沉积物粒度的因素主要是距离源区的远近和海拔高度．而风力强度基本相似．后期风化作用较小。可以忽视。随着距离现代沙漠南缘距离的增加和海拔高度的增加．沉积物的粒度都会相应减小。通过数学统计处理后的结果显示，在较小的空间范围内，海拔高度的影响比源区距离更重要。
英文摘要	Grain size is the most fundamental property of sediment particles, affecting their entrainment, transport and deposition. The aeolian sand and dust has been taken as an important proxy of expansion and contraction of the desert during geological period. The signals of the desert evolution were well preserved in the aeolian deposits on the margin of the desert, which are effective to reconstruct the desert expansion and contraction. According to the dominant wind direction,generally NW-SE,the authors systematically studied 7 sections of Malan loess in the Northern fringe of Xiangshan Mountain during the Last Glacial period. Detailed granular analyses show the properties of temporal and spatial of the Mal.an loess,and reducing of the percentage of the sand from northwest to southeast. The study indicates a new linear correlation model of sand percentage with altitude and distance,and the altitude has a more influence to the sand fraction.
中文关键词	粒度 ; 黄土 ; 风成沉积 ; 香山北麓
英文关键词	grain size loess aeolian sediments the Northern fringe of Xiangshan Mountain
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:2326513
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220167
作者单位	兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	徐树建,潘保田,胡春生,等. 香山北麓末次冰期风成沉积物粒度的空间变化研究[J]. 兰州大学,2006,13(2):4-6,74.
APA	徐树建,潘保田,胡春生,&高红山.(2006).香山北麓末次冰期风成沉积物粒度的空间变化研究.,13(2),4-6,74.
MLA	徐树建,et al."香山北麓末次冰期风成沉积物粒度的空间变化研究".13.2(2006):4-6,74.