文献类型：期刊文献

英文题名：Provenance and transport process for interdune sands in the Kumtagh Sand Sea, Northwest China

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

第一作者：Liang, Aimin

通信作者：Dong, ZB[1];Su, ZZ[2]

机构：[1]Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 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：367

外文期刊名：GEOMORPHOLOGY

收录：;Scopus(收录号：2-s2.0-85087004143);WOS:【SCI-EXPANDED(收录号:WOS:000564543300004)】；

基金：This study was supported by the National Natural Science Foundation of China (Grant 41930641; 41730644), the National Science and Technology Basic Research Program of China (Grant 2012FY111700) and the Second Tibetan Plateau Scientific Expedition and Research Program (Grant 2019QZKK0403). We are grateful to two anonymous reviewers for editing language and providing valuable suggestions, and for Dr. Daniel R. Muhs (Geosciences and Environmental Change Science Center, U.S. Geological Survey) for explaining the theory of using K/Rb and K/Ba values to identify sand provenance. We are also grateful to Dr. Yingjun Pang (Institute of Desertification, Chinese Academy of Forestry), and Dr. Deyong Kong (Shaoguan University) for their assistance with our fieldwork, and to Dr. Bing Liu and Dr. Xiaolei Liang (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences) for their discussion of data analysis. We extend our deepest respect and appreciation to all the scientists who made substantial contributions to previous research in the Kumtagh Sand Sea.

语种：英文

外文关键词：Interdune area; Sediment provenance; Grain size; Mineralogy; Geochemistry; Spatial scope; Transport mechanisms

摘要：Interdune areas are an important part of dune systems, as they affect dune evolution and sand sea development. However, there has been little work on the provenance of interdune sediments. Our lack of knowledge of these sediments prevents a more complete understanding of sand sea formation and evolution. In the present study, we focused on the provenance of interdune sediments in the Kumtagh Sand Sea based on their granular, mineral and geochemical characteristics, then further identified the spatial scope of the contribution of these sources to the interdune sediments and the associated transport mechanisms. Although sediment supply analysis suggested that the interdune sand may derive from the Altyn Tagh Mountains, Beishan Mountains, and Sanlongsha dune field, the provenance signature based on the K/Rb and K/Ba ratios revealed that the ultimate sources were the Altyn Tagh Mountains (in the south) and the Beishan Mountains (in the north). By plotting the identified provenance results on a map of the sand sea, we found that the spatial scopes of contributions from these sources were separated at around 40 degrees N. However, the existence of a fluvial load (EM1) and of reworked coarse particles (EM3) in the northern sand sea demonstrated that the interdune sands in this region were partly derived from the Altyn Tagh Mountains in the south. Consequently, by combining our results with the transport agents condition, we concluded that the Altyn Tagh Mountains supplied sediments to interdune areas by fluvial transport throughout the sand sea, but that sediment in the northern sand sea was subsequently reworked and mixed with windblown sand originated from the Beishan Mountains. (c) 2020 Elsevier B.V. All rights reserved.