气候变化领域集成服务门户(CCPortal): Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution

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DOI	10.1016/j.earscirev.2019.01.021
	Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution
	Fang X.; Fang Y.; Zan J.; Zhang W.; Song C.; Appel E.; Meng Q.; Miao Y.; Dai S.; Lu Y.; Zhang T.
发表日期	2019
ISSN	00128252
起始页码	460
结束页码	485
卷号	190
英文摘要	The Xining Basin is well known for its thick and continuous sequence of fine-grained Cenozoic sediments. In addition, it contains important Xiejia fauna which define the Xiejian Stage of the early Miocene in the standard Chinese land mammal zonation, and it also provides detailed histories of eolian dust deposition which document the aridification of Asia, monsoon evolution and the initiation of the Yellow River in relation to the uplift of the Tibetan Plateau. However, the results of magnetostratigraphic dating of the fossil-bearing sequence has yielded conflicting ages for the fauna and stratigraphy, hindering the use of the sequence for addressing major paleoenvironmental and paleoclimatic issues. Here, we review the paleontological, lithological and magnetostratigraphic record of the Xining Basin and provide a new, long and continuous high-resolution magnetostratigraphy from the basin center. The results show that the observed magnetic polarity zones from the various sections at different sites in the basin exhibit similar magnetic polarity patterns which can be readily correlated, in terms of both magnetic polarity zonation and lithofacies; in addition, they show that the sedimentary sequence of the basin was sub-continuously deposited from ~54 Ma to 4.8 Ma. The magnetostratigraphic correlations confirm previous constraint of the Xiejia fauna in the late Oligocene at ~25 Ma, challenging the current Chinese mammal land zonation for the early Miocene, and we suggest that it provides a superior record of eolian dust deposition and river incision in the late Pliocene than previous studies. There is a close match of the climatic proxy records of the Xiejia section, dated by magnetostratigraphy, with the global climatic record which corroborates the paleomagnetic correlations. The evolution of the sedimentary environment provided by the lithofacies demonstrates a complete cycle of basin formation and termination, which records the eastern Qilian Shan experienced three main phases of uplifts: slow episodic uplifts at ~54 Ma and 22.5 Ma and a late rapid episodic uplifts at 8–7 Ma and since 4.8–3.6 Ma. This tectonic uplift in the NE Tibetan Plateau was mostly nearly synchronous responses to the initial and continuing collision of India and Asia since ~50 ± 5 Ma. © 2019 Elsevier B.V.
关键词	Cenozoic magnetostratigraphy Eolian dust deposition NE Tibet uplift Xiejia fauna Xining Basin
英文关键词	Cenozoic; deposition; eolian deposit; fauna; magnetostratigraphy; paleontology; sedimentology; sequence stratigraphy; tectonic evolution; China; Qinghai; Xining Basin; Mammalia
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203420
作者单位	CAS Center for Excellence in Tibetan Plateau Earth Sciences and Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China; School of Earth Sciences & Key Laboratory of Western China's Environmental Systems (MOE), Lanzhou University, Lanzhou, 730000, China; Department of Geosciences, University of Tübingen, Hölderlinstr. 12, Tübingen, 72074, Germany; Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Fang X.,Fang Y.,Zan J.,et al. Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution[J],2019,190.
APA	Fang X..,Fang Y..,Zan J..,Zhang W..,Song C..,...&Zhang T..(2019).Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution.Earth Science Reviews,190.
MLA	Fang X.,et al."Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution".Earth Science Reviews 190(2019).