Sedimentary and OSL dating evidence for the development of the present Hobq desert landscape, northern China

作     者：FAN YuXin CHEN XiaoLong FAN TianLai JIN Ming LIU JianBao CHEN FaHu 

作者机构：Key Laboratory of Western China's Environmental Systems (MOE)Lanzhou University School of Earth Sciences & Key Laboratory of Mineral Resources in Western China (Gansu Province)Lanzhou University 

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

年 卷 期：2013年第56卷第12期

页      面：2037-2044页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41172163,40972116) the Chinese National Programs for Fundamental Research and Development(Grant No.2010CB950202) the program for New Century Excellent Talents in University(Grant No.NCET-12-0251) the Fundamental Research Funds for the Central Universities(Grant No.LZUJBKY-2013-K17) 

主　　题：Hobq Desert OSL dating Last Glacial Maximum Holocene environmental and climatic change 

摘      要：The sedimentary sequence and landscape of the Hobq desert was observed through twelve profiles along five N-S sections extending through the entire *** sands were found to overlie the alluvial,diluvial,and lacustrine sediments in this *** stimulated luminescence(OSL)dating results were obtained from post-IR OSL signals of quartz fractions of sand samples at the bottom of sand dunes and hills by using the Double-SAR *** OSL ages reveal that the latest sand accumulation began around 19 ka in the northwestern part and 9 ka in the eastern part of the Hobq *** 7 ka,the sand accumulation was strengthened and extended southward and northward 2 ka to develop the present desert *** study suggests that the aeolian sand accumulation around 19,9 and 7 ka resulted from the weakening of the Asian summer monsoon over this ***,the rapid development of the present Hobq desert landscape since 2 ka was likely triggered by human activities in this desert.