Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau

doi:10.1016/j.gloplacha.2017.09.008

	Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau
	Zhao, Y (Zhao, Yan)2; Tang, FJ (Tang, Fenjun)1,2; Zhang, T (Zhang, Tao)2; Zhang, WL (Zhang, Weilin)2; Zan, JB (Zan, Jinbo)2; Fang, XM ; Wu, FL (Wu, Fuli)2; Fang, XM (Fang, Xiaomin)2,3; Meng, QQ (Meng, Qingquan)3
刊名	GLOBAL AND PLANETARY CHANGE
	2017
卷号	158 期号:0 页码:36-46
关键词	Chinese Loess Plateau Diffuse-reflectance Spectroscopy Cenozoic Tectonic Evolution Asian Monsoon System Margin Erosion Xining Basin Hematite Sequence Transition Ma
DOI	10.1016/j.gloplacha.2017.09.008
文献子类	Article
英文摘要	The East Asian monsoon is generally regarded to have initiated at the transition from the Late Oligocene to the Early Miocene. However, little is known about this process because of a lack of continuous strata across the boundary between the Late Oligocene and the Early Miocene in Asia. Based on previous drilling (core HZ-1) in the Miocene sediments in the southern Linxia Basin in NW China, we drilled a new 620 m core (HZ-2) into the Late Oligocene strata and obtained 206 m of continuous new core. The detailed paleomagnetism of the new core reveals eleven pairs of normal and reversed polarity zones that can be readily correlated with chrons 6Bn-9n of the geomagnetic polarity time scale (GPTS), define an age interval of 21.6-26.5 Ma and indicate continuity from the Late Oligocene to Early Miocene. The core is characterized by the remarkable occurrence of brownish-red paleosols of luvic cambisols (brown to luvic drab soils) above reddish-brown floodplain siltstones and mud stones, which suggest that the East Asian monsoon likely began by 26.5 Ma. In contrast to the siltstone and mudstone of the Late Oligocene strata, the Miocene strata begin with a thick fine sandstone bed, which marks sudden increases in erosion and loading that most likely reflect a response to tectonic uplift. The hematite content and redness index records of the core further demonstrate that the monsoonal climate in the Late Oligocene to Early Miocene in this area was mainly controlled by global temperature trends and events.
学科主题	地质学
WOS研究方向	Physical Geography; Geology
语种	英语
WOS记录号	WOS:000415771500004
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/7952]
专题	青藏高原研究所_图书馆
通讯作者	Fang, XM
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China. 2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Continental Collis & Plateau Uplift, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China. 3.Lanzhou Univ, Sch Earth Sci, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Zhao, Y ,Tang, FJ ,Zhang, T ,et al. Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau[J]. GLOBAL AND PLANETARY CHANGE,2017,158(0):36-46.
APA	Zhao, Y .,Tang, FJ .,Zhang, T .,Zhang, WL .,Zan, JB .,...&Meng, QQ .(2017).Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau.GLOBAL AND PLANETARY CHANGE,158(0),36-46.
MLA	Zhao, Y ,et al."Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau".GLOBAL AND PLANETARY CHANGE 158.0(2017):36-46.