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

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doi: 10.1002/2014JB011686
Author(s): Li Chunfeng; 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.; Hernández-Almeida, Iván; Huang Xiaolong; 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.; Hai Son Trinh; Yeh, Yi-Ching; Zhang Chuanlun; Zhang, Fan; Zhang Guoliang; Zhao Xixi
Author Affiliation(s): Primary:
Tongji University, Laboratory of Marine Geology, Shanghai, China
Other:
State Oceanic Administration, China
Federal Institute for Geosciences and Natural Resources, Germany
Guangzhou Marine Geological Survey, China
China National Offshore Oil Company, China
Woods Hole Oceanographic Institution, United States
Texas A&M University, United States
Lamont-Doherty Earth Observatory, United States
Swiss Federal Institute of Technology, Switzerland
University of Toulouse, France
University of South Florida, United States
Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, China
Louisiana State University, United States
Oregon State University, United States
Macquarie University, Canada
University of Bern, Switzerland
Korea Institute of Ocean Science and Technology, South Korea
China University of Geosciences, China
Ministry of Natural Resources and Environment, Vietnam
Taiwan Ocean Research Institute, Taiwan
Chinese Academy of Sciences, Institute of Oceanology, China
Volume Title: Journal of Geophysical Research: Solid Earth
Source: Journal of Geophysical Research: Solid Earth, 120(3), p.1377-1399. Publisher: Wiley-Blackwell for American Geophysical Union, Washington, DC, United States. ISSN: 2169-9313
Note: In English. 36 refs.; illus., incl. 2 tables, sketch maps
Summary: 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. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved.
Year of Publication: 2015
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 16 Structural Geology; Basin analysis; Cenozoic; Expedition 349; Geophysical methods; Geophysical profiles; Geophysical surveys; IODP Site U1432; International Ocean Discovery Program; Leg 184; Marine sediments; Miocene; Neogene; Neotectonics; North Pacific; Northwest Pacific; ODP Site 1148; Ocean Drilling Program; Pacific Ocean; Pleistocene; Quaternary; Sediments; Seismic methods; Seismic profiles; Seismic stratigraphy; South China Sea; Stratigraphic boundary; Surveys; Tectonics; Tertiary; Unconformities; West Pacific
Coordinates: N185010 N185010 E1163356 E1163356
N125500 N183400 E1170100 E1145500
Record ID: 2015060659
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom