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Paleomagnetic Constraints on the Middle Miocene-Early Pliocene Stratigraphy in the Xining Basin, NE Tibetan Plateau, and the Geologic Implications

文献类型：期刊论文

作者Yang, Rongsheng1,2,3; Fang, Xiaomin1,2,3; Meng, Qingquan4,5; Zan, Jinbo1,2; Zhang, Weilin1,2; Deng, Tao6; Yang, Yibo1,2; Ruan, Xiaobai1,2,3; Yang, Liye1,2,3; Li, Bingshuai1,2,3
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2017-11-01
卷号18期号:11页码:3741-3757
关键词Uppermost Cenozoic Stratigraphic Sequence Xining Basin Magnetostratigraphy Late Miocene-early Pliocene Eastern Qilian Shan Uplift
ISSN号1525-2027
DOI10.1002/2017GC006945
文献子类Article
英文摘要The Xining Basin lies in the transitional zone between the arid Asian interior and the East Asian monsoon region. The continuous Cenozoic sediments in the basin provide a unique archive recording the uplift of the Tibetan Plateau and its environmental effects on central Asian aridification and Asian monsoon evolution. However, sediments deposited since the middle Middle Miocene have not been precisely dated, hindering our ability to address these issues. Here we dated a 336 m-thick section containing many Late Miocene fossil mammals from the eastern basin. High-resolution paleomagnetism revealed 16 normal and 16 reversed zones that correlate well with chrons 3n to 5Ar.1r of the Geomagnetic Polarity Time Scale, constraining the section to approximate to 12.7-4.8 Ma. The changes in lithofacies from floodplain to braided river at approximate to 8.6 Ma and to thick alluvial fan at approximate to 6.3 Ma with predominantly southerly paleocurrent directions occur simultaneously with an increase in the sedimentation rates, representing two periods of rapid uplift in the eastern Qilian Shan to the north. Our results provide a robust oldest age constraint (<4.8 Ma) on the ancient Huang Shui and Yellow River terraces on the basin sediments and eolian deposits on the terraces. The presence of well-developed floodplain paleosols, shallow lake marls, and many large mammals in the lower section suggests that the monsoon climate in the late Middle Miocene to Late Miocene was more humid and stronger than that at present.
WOS关键词RESOLUTION MAGNETO STRATIGRAPHY ; EOCENE-OLIGOCENE TRANSITION ; LATE CENOZOIC DEFORMATION ; LINXIA BASIN ; CLIMATE-CHANGE ; GUIDE BASIN ; QAIDAM BASIN ; ENVIRONMENTAL-CHANGES ; NORTHERN-HEMISPHERE ; SEDIMENTARY ARCHIVE
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000418403800001
出版者AMER GEOPHYSICAL UNION
资助机构(973) National Basic Research Program of China(2013CB956400) ; Bureau of International Cooperation, Chinese Academy of Sciences(131C11KYSB20160072) ; National Natural Science Foundation of China(41620104002)
源URL[http://119.78.100.205/handle/311034/8705]  
专题中国科学院古脊椎动物与古人类研究所
通讯作者Fang, Xiaomin
作者单位1.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Lanzhou Univ, Sch Earth Sci, Lanzhou, Gansu, Peoples R China
5.Lanzhou Univ, Key Lab Western Chinas Mineral Resource Gansu Pro, Lanzhou, Gansu, Peoples R China
6.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Rongsheng,Fang, Xiaomin,Meng, Qingquan,et al. Paleomagnetic Constraints on the Middle Miocene-Early Pliocene Stratigraphy in the Xining Basin, NE Tibetan Plateau, and the Geologic Implications[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2017,18(11):3741-3757.
APA Yang, Rongsheng.,Fang, Xiaomin.,Meng, Qingquan.,Zan, Jinbo.,Zhang, Weilin.,...&Li, Bingshuai.(2017).Paleomagnetic Constraints on the Middle Miocene-Early Pliocene Stratigraphy in the Xining Basin, NE Tibetan Plateau, and the Geologic Implications.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,18(11),3741-3757.
MLA Yang, Rongsheng,et al."Paleomagnetic Constraints on the Middle Miocene-Early Pliocene Stratigraphy in the Xining Basin, NE Tibetan Plateau, and the Geologic Implications".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 18.11(2017):3741-3757.

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来源：古脊椎动物与古人类研究所

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