The episodic geomorphological-sedimentary evolution of different basins in the Fenwei Graben and its tectonic implication

作     者：HU Xiaomeng ZHOU Tianhang CAI Shun 

作者机构：Geography Department Shanghai Normal University Shanghai 200234 China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2017年第27卷第11期

页      面：1359-1375页

核心收录：

学科分类：070801[理学-固体地球物理学] 081803[工学-地质工程] 07[理学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：Foundation: National Natural Science Foundation of China  No.41371021 

主　　题：Fenwei Graben lacustrine and alluvial terrace paleolake regression Tibetan Plateau 

摘      要：There are a series of basins in the Fenwei Graben. Field survey found that there took place several paleolake regressions or intensive stream down-incisions in all basins during the Mid-Late Quaternary. The lowest and oldest paleosol/Ioess units overlying three of the lacustrine terraces or alluvial ones and some paleomagenetism data from the lacustrine sediment indicate that the onset times of three paleolake regressions or intensive stream down-incisions are synchronous with the formation of Lg, L6 and L2 respectively in the Weihe Basin, $8, S~ and $1 respectively in the Linfen-Taiyuan-Xingding Basins, and Ls, Ls and L1 respectively in the Datong Basin. The difference in the onset time of each lake regressions or intensive stream down-incision in different basins reveals that the farther the basin is from the Tibetan Plateau, the later it took place. Taking these field facts and the former research re- sults in terms of the regional tectonic movement into account, it is inferred that the tectonic movement of the Tibetan Plateau most probably controlled such geomorphological- sedimentary evolution in the graben.