干旱区生态环境知识资源中心(Arid): Discovery and Significance of Malan Loess on the Piedmont Plain in Pinggu District, Beijing

Arid

	Discovery and Significance of Malan Loess on the Piedmont Plain in Pinggu District, Beijing
	Lu Lu; Zhao Yuanyi; Wang Xiaoliang; Zhao Xitao; Yang Zhenjing; Wang Chengmin; Bi Zhiwei; Lu Wenhui
来源期刊	Acta Geologica Sinica
ISSN	1000-9515
出版年	2014
卷号	88 期号:5 页码:1565-1578
英文摘要	The platforms on both sides of the Malangou River (a lateral ditch of the Qingshui River that is a tributary of the Yongding River) where Malan Village in Zhaitang Town of Mentougou District of Beijing is located are the place of China's typical section of the Quaternary Malan loess. During the investigation in the eastern suburbs of Beijing City, the authors not only clarified 5 grades of terraces on the Pinggu piedmont plain, but also found a clayey silt section mixed with a small amount of alluvial-diluvial gravel layers at a height of 15-25 m above the river level near a Fishpond in Xinli Village of Nandule Town. Results of the study of grain size of the section document that the loess mostly is silty soil (0.05-0.005 mm), and that the grain size probability cumulative curves of the section are dominated by single-peak, coarse-grained segment I and coarse-grained segment II types, reflecting that its depositional environment is similar to eolian phase. Identification results of heavy minerals from the section show that their contents account for 0.01%-0.11%, averaging 0.04%. There are 24 kinds of heavy minerals, most of which are stable heavy minerals, and the clay minerals mostly are illite, which is consistent with the Malan loess on the Loess Plateau. The chemical composition data reflect that the source area of the loess is relatively arid. The six grade classification of sporopollen in the section further shows the subdivision of the history of alternating warm and humid phases in this geological period. The thermoluminescence dating results range from 21.0 ka to 59.2 ka, convincingly demonstrating that the section indeed consists of Malan loess. The above studies provide a new basis for overall understanding of the distribution of the Malan loess at the northeast margin of the North China Plain and its environment change in the Late Pleistocene.
英文关键词	eolian loess Malan loess formation environment Pinggu
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5276197
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335420
作者单位	Lu Lu, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China.; Zhao Yuanyi, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China.; Wang Xiaoliang, Liaoning Institute of Geology and Mineral Resources, Shenyang, Liaoning 110032, China.; Zhao Xitao, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.; Yang Zhenjing, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, Hebei 050061, China.; Wang Chengmin, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, Hebei 050061, China.; Bi Zhiwei, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, Hebei 050061, China.; Lu Wenhui, No. 3 Geology and Mineral Exploration Institute of Gansu Provincial Bureau of Geology and Mineral, Lanzhou, Gansu 730050, China.
推荐引用方式 GB/T 7714	Lu Lu,Zhao Yuanyi,Wang Xiaoliang,et al. Discovery and Significance of Malan Loess on the Piedmont Plain in Pinggu District, Beijing[J],2014,88(5):1565-1578.
APA	Lu Lu.,Zhao Yuanyi.,Wang Xiaoliang.,Zhao Xitao.,Yang Zhenjing.,...&Lu Wenhui.(2014).Discovery and Significance of Malan Loess on the Piedmont Plain in Pinggu District, Beijing.Acta Geologica Sinica,88(5),1565-1578.
MLA	Lu Lu,et al."Discovery and Significance of Malan Loess on the Piedmont Plain in Pinggu District, Beijing".Acta Geologica Sinica 88.5(2014):1565-1578.