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

doi:10.1002/2017GC006945

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	Paleomagnetic Constraints on the Middle Miocene-Early Pliocene Stratigraphy in the Xining Basin, NE Tibetan Plateau, and the Geologic Implications
	Yang, Rongsheng 1,2,3; Fang, Xiaomin 1,2,3; Meng, Qingquan 4,5; Zan, Jinbo 1,2; Zhang, Weilin 1,2; Deng, Tao6 ; Yang, Yibo 1,2; Ruan, Xiaobai 1,2,3; Yang, Liye 1,2,3; Li, Bingshuai 1,2,3
	2017-11-01
发表期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
ISSN	1525-2027
卷号	18 期号:11 页码:3741-3757
文章类型	Article
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.
关键词	Uppermost Cenozoic Stratigraphic Sequence Xining Basin Magnetostratigraphy Late Miocene-early Pliocene Eastern Qilian Shan Uplift
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1002/2017GC006945
关键词[WOS]	RESOLUTION MAGNETO STRATIGRAPHY ; EOCENE-OLIGOCENE TRANSITION ; LATE CENOZOIC DEFORMATION ; LINXIA BASIN ; CLIMATE-CHANGE ; GUIDE BASIN ; QAIDAM BASIN ; ENVIRONMENTAL-CHANGES ; NORTHERN-HEMISPHERE ; SEDIMENTARY ARCHIVE
收录类别	SCI
语种	英语
项目资助者	(973) National Basic Research Program of China(2013CB956400) ; Bureau of International Cooperation, Chinese Academy of Sciences(131C11KYSB20160072) ; National Natural Science Foundation of China(41620104002)
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000418403800001
出版者	AMER GEOPHYSICAL UNION
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/8706
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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