文献类型：期刊文献

英文题名：Using spatial variations of grain size to reveal sediment transport in the Kumtagh Sand Sea, Northwest China

作者：Liang, Aimin[1,2] Dong, Zhibao[3] Qu, Jianjun[1] Su, Zhizhu[4] Wu, Bo[5] Zhang, Zhengcai[1] Qian, Guangqiang[1] Gao, Junliang[6] Pang, Yingjun[5] Yang, Zhuanling[1]

第一作者：Liang, Aimin

通信作者：Qu, JJ[1];Dong, ZB[2]

机构：[1]Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710062, Peoples R China;[4]Shanxi Univ, Sch Hist & Culture, Taiyuan 030006, Peoples R China;[5]Chinese Acad Forestry, Inst Desertificat, Beijing 100091, Peoples R China;[6]Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Peoples R China

年份：2020

卷号：46

外文期刊名：AEOLIAN RESEARCH

收录：;Scopus(收录号：2-s2.0-85084255519);WOS:【SCI-EXPANDED(收录号:WOS:000564565800003)】；

基金：This study was supported by the National Nature Science Foundation of China (Grant nos. 41930641 and 41730644) and the China National Science and Technology Basic Research Program (Grant no. 2012FY111700). We are very grateful to Dr. Deyong Kong (Shaoguan University), Dr. Jiankang Liu (Ningxia University) and Dr. Yanfeng Bao (Institute of Desertification, Chinese Academy of Forestry) for assisting in the field work. We are also grateful to Dr. Bing Liu and Dr. Xiaolei Liang (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences) for their discussions in this research. We would also like to extend our deepest respect and appreciation to all the scientists who have made substantial contributions to earlier research papers on the Kumtagh Sand Sea.

语种：英文

外文关键词：Grain-size variation; Interpolation; Fluvial-aeolian interaction; Transport process; Kumtagh Sand Sea

摘要：The identification of sediment transport processes is essential in understanding the accumulation and development of sand seas. However, only limited effort has been made to extract macroscale sediment transport information in aeolian science. In this study, we investigated grain-size variation to gain insight into large-scale sediment transport processes in the Kumtagh Sand Sea. Results suggest that grain-size variation is correlated to fluvial-aeolian interaction. In the central sand sea region, due to intermixed fluvial-aeolian controls, the downwind trend of grain size was significant except for the area surrounding the channel belt; but the grain-size trend in a downstream direction was not obvious. In the northeastern sand sea region, dune sand became progressively finer along a downwind direction, but sorting remained consistent. This phenomenon is ascribed to the fact that sand from upwind areas is mixed with local interdune sand. By combining evidence from dune patterns, grain sizes and mineral composition differences, we determined that sediment transport processes in the Kumtagh Sand Sea can be summarized as follows: Fluvial system transport sediments from the Altyn-Tagh Mountains to the sand sea, after which prevailing northerly winds subsequently rework these sediments and deliver them to downwind areas; meanwhile, sand from upwind areas is mixed with local sand in the northeastern sand sea region. Our findings provide insight into modern sand sea formation under the control of fluvial-aeolian interactions, while potentially offering further implications that can be used to explore paleogeographic process based on these modern processes.