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    Seismic stratigraphy of the central South China Sea basin and implications for neotectonics

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    Date
    2015-03-16
    Author
    Li, Chun-Feng 
    Li, Jiabiao 
    Ding, Weiwei 
    Franke, Dieter 
    Yao, Yongjian 
    Shi, Hesheng 
    Pang, Xiong 
    Cao, Ying 
    Lin, Jian 
    Kulhanek, Denise K. 
    Williams, Trevor 
    Bao, Rui 
    Briais, Anne 
    Brown, Elizabeth A. 
    Chen, Yifeng 
    Clift, Peter D. 
    Colwell, Frederick S. 
    Dadd, Kelsie A. 
    Hernandez-Almeida, Ivan 
    Huang, Xiao-Long 
    Hyun, Sangmin 
    Jiang, Tao 
    Koppers, Anthony A. P. 
    Li, Qianyu 
    Liu, Chuanlian 
    Liu, Qingsong 
    Liu, Zhifei 
    Nagai, Renata H. 
    Peleo-Alampay, Alyssa 
    Su, Xin 
    Sun, Zhen 
    Tejada, Maria Luisa G. 
    Trinh, Hai Son 
    Yeh, Yi-Ching 
    Zhang, Chuanlun 
    Zhang, Fan 
    Zhang, Guo-Liang 
    Zhao, Xixi 
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/7296
    As published
    https://doi.org/10.1002/2014JB011686
    DOI
    10.1002/2014JB011686
    Keyword
     South China Sea; Seismic stratigraphy; Seismic facies; Neotectonism; IODP Expedition 349; Core-well-seismic integration 
    Abstract
    Coring/logging data and physical property measurements from International Ocean Discovery Program Expedition 349 are integrated with, and correlated to, reflection seismic data to map seismic sequence boundaries and facies of the central basin and neighboring regions of the South China Sea. First-order sequence boundaries are interpreted, which are Oligocene/Miocene, middle Miocene/late Miocene, Miocene/Pliocene, and Pliocene/Pleistocene boundaries. A characteristic early Pleistocene strong reflector is also identified, which marks the top of extensive carbonate-rich deposition in the southern East and Southwest Subbasins. The fossil spreading ridge and the boundary between the East and Southwest Subbasins acted as major sedimentary barriers, across which seismic facies changes sharply and cannot be easily correlated. The sharp seismic facies change along the Miocene-Pliocene boundary indicates that a dramatic regional tectonostratigraphic event occurred at about 5 Ma, coeval with the onsets of uplift of Taiwan and accelerated subsidence and transgression in the northern margin. The depocenter or the area of the highest sedimentation rate switched from the northern East Subbasin during the Miocene to the Southwest Subbasin and the area close to the fossil ridge in the southern East Subbasin in the Pleistocene. The most active faulting and vertical uplifting now occur in the southern East Subbasin, caused most likely by the active and fastest subduction/obduction in the southern segment of the Manila Trench and the collision between the northeast Palawan and the Luzon arc. Timing of magmatic intrusions and seamounts constrained by seismic stratigraphy in the central basin varies and does not show temporal pulsing in their activities.
    Description
    Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 120 (2015): 1377–1399, doi:10.1002/2014JB011686.
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    • Geology and Geophysics (G&G)
    Suggested Citation
    Journal of Geophysical Research: Solid Earth 120 (2015): 1377–1399
     

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