Environmental Information Revealed by Sensitive Grain Size Component of Lake Sediments in Longcheng Yardang on the Northeast Edge of Tarim Basin

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Kong, Xue^1 ; Bai, Youliang^1 ; Xu, Xiaofeng^1 ; Yan, Changhong^1 ; Wang, Dongqing^1 ; Li, Bo^1

Northwest Institute of Nuclear Technology, Xi'an

710024, China^1

关键词: Distribution law;    Environmental evolution;    Environmental factors;    Environmental information;    Grain-size components;    Material sources;    Sensitive components;    Standard deviation method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/6/062103/pdf
DOI  :  10.1088/1757-899X/392/6/062103

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

On basis of grade-standard deviation method, two sensitive grain size components (component 1:5.8∼10.0μm, component 2:60.3∼104.7μm) and a less sensitive grain size component (component 3:15.1μm∼22.9μm) were extracted from the samples of the sedimentary age of LX02 profile, which were collected from Longcheng Yardang region on the northeast edge of Tarim Basin. The study discusses the material sources and action forms of different grain size sensitive components, which can be used as an indicator to reveal the regularity of the lake and the intensity of wind-sand activity respectively. The lacustrine transgressive and regressive history of the region has been reconstructed for 72-51ka B.P. by the characteristics of the content of sensitive grain size component 2, and the palaeoclimate information of the sediments was restored, which provided the basis for exploring the distribution law of other environmental factors in lake sediments. This paper is helpful to explore the law of environmental evolution and the history of climate change in arid regions.