干旱区生态环境知识资源中心(Arid): 陇西盆地末次冰期黄土粒度特征及其环境意义

Arid

	陇西盆地末次冰期黄土粒度特征及其环境意义
其他题名	Environmental Significance and Characteristics of Grain Size of the Loess in Longxi Basin during the Last Glacial Period
	徐树建; 潘保田; 李琼; 高红山; 王均平; 胡春生
来源期刊	沉积学报
ISSN	1000-0550
出版年	2005
卷号	23 期号:4 页码:702-708
中文摘要	顺着风成堆积物搬运的主导方向，对黄土高原西部的末次冰期以来的24个风成堆积物剖面的粒度进行了系统分析，对比各个粒度指标，分析了粒度的空间分布特征，提取了最为敏感的粒度指标，并在南北向大断面上建立了砂的百分含量与沙漠距离的数学模型，该模型与黄土高原中部有所不同。
英文摘要	Chinese loess-paleosol sequence has provided the most detailed terrestrial records of climate changes in Quaternary. 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, we systematically studies 24 sections of Malan loess in the west of Chinese Loess Plateau during the Last Glacial period. Detailed granular analyses show the properties of temporal and spatial of the Malan loess, and reducing of the percentage of the sand from northwest to southeast. Our study indicates that the proxies such as D [4, 3], the fraction 〉4mum （%）, the fraction 〉63mum （%）, and the Mode are more sensitive than any other proxy. A new linear correlation model of sand percentage and distance are established, which shows different pattern to the east of the Chinese Loess Plateau.
中文关键词	风尘 ; 粒度特征 ; 黄土 ; 砂 ; 陇西盆地
英文关键词	eolian dust character of grain size loess sand Longxi Basin
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:2166471
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/2XILL650/205974
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,李琼,等. 陇西盆地末次冰期黄土粒度特征及其环境意义[J]. 兰州大学,2005,23(4):702-708.
APA	徐树建,潘保田,李琼,高红山,王均平,&胡春生.(2005).陇西盆地末次冰期黄土粒度特征及其环境意义.沉积学报,23(4),702-708.
MLA	徐树建,et al."陇西盆地末次冰期黄土粒度特征及其环境意义".沉积学报 23.4(2005):702-708.