Grain Size Characteristics and Origin of the “Wushan Loess” at Wushan Area

• 责任者：Li Chang’an (Key Laboratory of Biogeology and Environmental Geology ; Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhang Yufen
• 刊名：Earth Science
• 出版年：2010
• 卷期：35(5)
• 关键词：黄土 ; loess ; 粒度分析 ; grain-size analysis ; 长江 ; Yangtze River
• 页码：p.879-884
• 图表：6 illus., 1 table, 19 refs.
• 分类号：1400
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

Based on the grain size analyses of "Wushan Loess" at Wushan area,the causes of “Wushan Loess” are discussed in this paper. The results show as follows. The component particles of the “Wushan Loess” are predominantly less than 50 μm with the average content of >50 μm about 16.9%; the average content of coarse silt (10~50 μm) is 43.1% as the “dominant group” of the “Wushan Loess”; the average content of 5~10 μm group is 14.5% and <5 μm group makes up 25.5%. The most discriminant analysis result is of negative value, which displays that the aeolian origin is prevailing and individual layer is affected by water flow action.