Tectonic Uplift of the Yili Basin during the Last Stage of the Late Pleistocene: Evidence from ESR and OSL Dating of Sediments in the Huocheng Area, Xinjiang  

作　　者：LI Jiangang YUAN Sihua LIU Yongjiang LIU Xiaoyan BAI Xiangdong JIANG Jiyi LI Ying ZHAO Zhenhong 

机构地区：[1]Chinese Academy of Geological Sciences,Beijing 100037,China [2]China University of Geosciences,Beijing 100083,China [3]Institute of Disaster Prevention,Sanhe,Hebei 065201,China [4]Key Lab of Submarine Geoscience and Prospecting Techniques,MOE,Institute for Advanced Ocean Study,College of Marine Geosciences,Ocean University of China,Qingdao 266100,China [5]Xi’an Center of China Geological Survey,Xi’an 710054,China

出　　处：《Acta Geologica Sinica(English Edition)》2019年第5期1219-1227,共9页地质学报（英文版）

基　　金：financial support of the Natural Science Foundation of China (No. 41772200);China Earthquake Administration teacher research Fund (No. 20140103);China Geological Survey Program (No. 121201011000150021, No.DD20190351);Innovation Leading Talents Program of Qingdao (19–3–2–19–zhc)

摘　　要：The Quaternary sediments in the Yili Basin can serve as archives for studying the Cenozoic basin-mountain relationship. In this study, based on typical natural sections and boreholes, the surficial sediments of the Huocheng area were studied, and their sedimentary ages were obtained using the optically stimulated luminescence(OSL) and electron spin resonance(ESR) dating methods. These dates, combined with changes in the sedimentary facies, provided details of the neotectonic movement in the Yili Basin and adjacent areas. By dating sediments from five sections and three boreholes, we determined that the surficial sediments of the Huocheng area were mainly formed in the Late Pleistocene, with scattered instances of Holocene sediments. The surficial sediments mainly consisted of alluvial fan facies, fluvial facies, lacustrine facies, and desert facies. Based on the activity on the Hongshanzui fault and the northern margin fault of the Wusun Mountains, the Huocheng area was uplifted synchronously with the Tianshan Mountains during the last stage of the Late Pleistocene, causing the desert facies sediments to be superimposed on the former paleo-lake sediments.The Quaternary sediments in the Yili Basin can serve as archives for studying the Cenozoic basin–mountain relationship. In this study, based on typical natural sections and boreholes, the surficial sediments of the Huocheng area were studied, and their sedimentary ages were obtained using the optically stimulated luminescence(OSL) and electron spin resonance(ESR) dating methods. These dates, combined with changes in the sedimentary facies, provided details of the neotectonic movement in the Yili Basin and adjacent areas. By dating sediments from five sections and three boreholes, we determined that the surficial sediments of the Huocheng area were mainly formed in the Late Pleistocene, with scattered instances of Holocene sediments. The surficial sediments mainly consisted of alluvial fan facies, fluvial facies, lacustrine facies, and desert facies. Based on the activity on the Hongshanzui fault and the northern margin fault of the Wusun Mountains, the Huocheng area was uplifted synchronously with the Tianshan Mountains during the last stage of the Late Pleistocene, causing the desert facies sediments to be superimposed on the former paleo–lake sediments.

关 键 词：YILI basin ESR OSL Late PLEISTOCENE NEOTECTONIC movement 

分 类 号：P53[天文地球—古生物学与地层学]