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Magneto- and litho-stratigraphic records of the Oligocene-Early Miocene climatic changes from deep drilling in the Linxia Basin, Northeast Tibetan Plateau
Wu, FL (Wu, Fuli)1; Fang, XM (Fang, Xiaomin)1,2; Meng, QQ (Meng, Qingquan)2; Zhao, Y (Zhao, Yan)1; Tang, FJ (Tang, Fenjun)1,3; Zhang, T (Zhang, Tao)1; Zhang, WL (Zhang, Weilin)1; Zan, JB (Zan, Jinbo)1; Fang, XM
Source PublicationGLOBAL AND PLANETARY CHANGE
2017
Volume158Issue:0Pages:36-46
DOI10.1016/j.gloplacha.2017.09.008
AbstractThe 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.
Subject Area地质学
WOS IDWOS:000415771500004
Language英语
Indexed BySCI
KeywordChinese Loess Plateau Diffuse-reflectance Spectroscopy Cenozoic Tectonic Evolution Asian Monsoon System Margin Erosion Xining Basin Hematite Sequence Transition Ma
WOS Research AreaPhysical Geography; Geology
WOS SubjectGeography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
Cooperation Status国内
SubtypeArticle
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7952
Collection图书馆
Corresponding AuthorFang, XM
Affiliation1.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.
2.Lanzhou Univ, Sch Earth Sci, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Gansu, Peoples R China.
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Wu, FL ,Fang, XM ,Meng, QQ ,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 Wu, FL .,Fang, XM .,Meng, QQ .,Zhao, Y .,Tang, FJ .,...&Fang, XM.(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 Wu, FL ,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.
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