沉积与特提斯地质2012，Vol.32Issue(1)：72-77,6.
成都平原区成都粘土的粒度特征及其成因意义
Grain size analysis and origin of the Chengdu clay from the Chengdu Plain, Sichuan
摘要
Abstract
The grain size analysis is carried out for the representative samples of the Chengdu clay taken from the Quaternary sections in the Chengdu Plain, Sichuan. The Chengdu clay consists essentially of silty grains of 5 to 50 μm in size, with an average grain diameter of 7.1 to 7.3 < φ i. e. , 7.4 to 6.6 μm in size)and also a small amount of more than 63 μm fraction, and in the diagram, tends to display the bimodal patterns of distribution. The grain size parameters, mean square deviation values and kurtosis values for the Chengdu clay are strikingly similar to those of the northern China loess and Garze loess, but quite different from those of the fluvial deposits. The above-mentioned aspects suggest that the Chengdu clay is a kind of aeolian soil. According the results of optically stimulated luminescence (OSL) , the Chengdu clay from the Chengdu Plain should be originated from the latest glacial sediments in the middle to late stages of the late Pleistocene. The bulk of the Chengdu clay is distal.关键词
成都粘土/粒度/黄土/末次冰期/成都平原Key words
Chengdu clay/ grain size/ loess/ latest glacial period/ Chengdu Plain分类
天文与地球科学引用本文复制引用
应立朝,梁斌,王全伟,朱兵,郝雪峰,王鑫,刘亮,付小方..成都平原区成都粘土的粒度特征及其成因意义[J].沉积与特提斯地质,2012,32(1):72-77,6.基金项目
中国地质调查局1:25万成都幅区域地质调查项目(项目编号:1212010880704) （项目编号:1212010880704）
西南科技大学研究生创新基金资助项目(项目编号:10ycjj19) （项目编号:10ycjj19）
