Tectonically-controlled infilling of the eastern Nihewan Basin,North China,since the middle Pleistocene

作     者：HAN ZhiYong LI XuSheng WANG Yong WANG XianYan YI ShuangWen LU HuaYu 

作者机构：School of Geographic and Oceanographic SciencesNanjing UniversityNanjing 210023China Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2016年第59卷第7期

页      面：1378-1389页

核心收录：

学科分类：070905[理学-第四纪地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by the Chinese Geological Survey(Grant No.12120113005600) the National Natural Science Foundation of China(Grant Nos.41472138&41371203) 

主　　题：Nihewan Basin Sedimentary facies Paleolake Fault OSL 

摘      要：There has been a significant debate about the nature and causes of the Pleistocene evolution of the Nihewan Basin, North China. We studied the eastern Nihewan Basin sedimentary facies at two main sites, Hutouliang and Donggou. A combination of field observations and measurements of sediment grain-size distribution was used to reconstruct the sequence of sedimentary environments since the middle Pleistocene, and optically-stimulated luminescence measurements were used to date the sediments. Our results indicate that a shallow lake occupied the basin center along the Sanggan River, probably lasting until -440 kyr ago before disappearing completely -340 kyr ago. It was succeeded by a phase of fluvial-dominated sediment accumulation which ended -30 kyr ago. We suggest that the formation of the gorge resulted from the relative uplift of the Niuxin Mountain along the Liulengshan fault -140 kyr ago. However, since -30 kyr ago the fault may have become inactive and the river downcutting near Shixia was no longer offset by the relative uplift, which caused a shift from deposition to denudation in the Nihewan Basin from then on. The disappearance of the paleolake -340 kyr ago may have been the culmination of the ongoing process of basin infilling.