Magnetostratigraphy and paleoenvironmental record of late Cenozoic sediments in the Taiyuan Basin,North China  

作　　者：Zhi-Qiang Feng Qian Li Wei Han Kun-Yuan Ma Yong-Jiang Liu Rong-Zhu Wei Yan-Wei Du Yong Lei Guang-Hui Li 

机构地区：[1]College of Geoscience and Geomatics Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,China [2]Shanxi Institute of Geological Survey,Taiyuan 030006,Shanxi Province,China [3]Frontiers Science Center for Deep Ocean Multispheres and Earth System,Key Lab of Submarine Geoscience and Prospecting Techniques,College of Marine Geosciences,Ocean University of China,Qingdao 266100,Shandong Province,China [4]Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,Shandong Province,China [5]College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,Shanxi Province,China [6]Department of Information Engineering,Shanxi University,Taiyuan 030013,Shanxi Province,China

出　　处：《Journal of Palaeogeography》2024年第4期971-992,共22页古地理学报（英文版）

基　　金：co-supported by the National Natural Science Foundation of China (No.202103021224012);the Shanxi Provincial Department of Science and Technology-Shanxi Youth Project (No.202103021223037);the China Geological Survey (Nos.202103021223037,121201102000150012-05);the Geological Exploration Fund Project of Shanxi Provincial Department of Land and Resources (No.HXCT01-2018F005);the Natural Science Foundation of Shanxi Province (No.2019L0126,2019L0054);the Outstanding Doctoral Scholarship of Shanxi Province (No.SXYBKY2019032)。

摘　　要：The Taiyuan Basin is of importance for intraplate tectonic deformation in North China and contains Cenozoic strata with a maximum thickness of 3800 m.A~853.5-m-deep borehole(ZK01)with an overall core recovery rate of 85.09%was drilled at Yuci(37°35'37?N,112°39'47?E)in the central Taiyuan Basin,to obtain high-resolution records of paleomagnetism,paleoclimatic and paleoenvironmental conditions,and depositional environment of the sediments.The obtained magnetic polarity sequence consists of 13 normal and 12 reverse zones,which correspond to C1n-C4An.2n of the geomagnetic polarity time scale.Magnetostratigraphic data show that the evolution of ZK01 core covers the interval from 8.1 Ma to the present,and the bottoms of Pliocene,Quaternary,and Middle Pleistocene were identified in Taiyuan Basin,with a sedimentary accumulation rate ranging from 62.5 m/Ma to 175.9 m/Ma.Geochemical data reveal that the source rocks in the study area underwent intense weathering and the sediments mainly formed in a semi-arid and oxygen-rich conditions.In addition,paleoclimatic changes occurred at~7 Ma,3.8 Ma,and 1.7 Ma,which can be closely related to the tectonic uplift of the Loess Plateau and Tibetan Plateau,as well as the variations in the Asian monsoon and associated regional and global climatic change.

关 键 词：Taiyuan Basin Core sediment MAGNETOSTRATIGRAPHY Climate change PALEOENVIRONMENT QUATERNARY 

分 类 号：P534.6[天文地球—古生物学与地层学] P512.2[天文地球—地质学]