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

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

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The Taiyuan Basin is of importance for intraplate tectonic deformation in North China and con-tains 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.Magneto-stratigraphic 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.

Taiyuan BasinCore sedimentMagnetostratigraphyClimate changePaleoenvironmentQuaternary

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

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College of Geoscience and Geomatics Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,China

Shanxi Institute of Geological Survey,Taiyuan 030006,Shanxi Province,China

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

Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,Shandong Province,China

College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,Shanxi Province,China

Department of Information Engineering,Shanxi University,Taiyuan 030013,Shanxi Province,China

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2024

10.1016/j.jop.2024.09.001

古地理学报(英文版)

古地理学报(英文版)

影响因子：0.186
ISSN：
年,卷(期)：2024.13(4)