The sedimentary, magmatic and tectonic evolution of the southwestern South China Sea revealed by seismic stratigraphic analysis

Li, Lü; Clift, Peter D.; Nguyen, Hung The

doi:10.1007/s11001-013-9171-y

Cited by 39 publications

(52 citation statements)

References 51 publications

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“…This also puts a time period of ~7 million years between the cessation of seafloor spreading and the initiation of seamount activities in the Southwest Subbasin. This is comparable to late Miocene and Pliocene seamount volcanism found in the extreme southwest of the oceanic basin (Li et al, 2013b). Further postcruise sedimentological and geochemical studies will refine the ages and nature of these seamount activities and reveal how magma sources at the dying spreading center evolved through time.…”

Section: Mantle and Crustal Processes Seamount Volcanism And Terminalsupporting

confidence: 57%

South China Sea Tectonics

2015

Proceedings of the International Ocean Discovery Program

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Section: Mantle and Crustal Processes Seamount Volcanism And Terminalsupporting

confidence: 57%

South China Sea Tectonics

2015

Proceedings of the International Ocean Discovery Program

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“…On the southern Vietnamese margin, data were released from Halliburton Geophysical Services, Inc. (Houston, TX, USA) ( Fig. While the modelled profiles we consider here do not cut or lie very close to drill sites, they are cut by other lines where well control is possible, as documented by Li et al (2013). 2, provided by Total Exploration and Production.…”

Section: Data Source and Methodsmentioning

confidence: 99%

“…The survey lines across the shelf edge of the Nam Con Son margin and the adjacent deep water and slope area were provided by PetroVietnam. Ages were then correlated across the entire study area using seismic stratigraphy, with well-based age picks being projected onto the nearest seismic profile from where they could be correlated over wide areas (Li et al, 2013). 2) with age control derived from drill sites located on the shelf, as shown in Fig.…”

Section: Data Source and Methodsmentioning

confidence: 99%

“…To the northwest, the area is bounded by the southern Vietnamese margin, and to the northeast, there is the COT zone linked to the now inactive seafloor spreading centre. In our study region, there are several shallow-water banks that are located in the south of the survey area and which lie within the COT, separated from the less thinned crust of the Sunda Shelf by a deep basin (Li et al, 2013). 1).…”

Section: Geologic Settingmentioning

confidence: 99%

“…The COT in this area and all around the oceanic basin of the South China Sea was first defined by Ludwig et al (1979). The green dots show the well locations used to provide biostratigraphic age control from Li et al (2013). Arguments about how to define and locate the COT continue to be extremely active and no consensus has yet been reached across much of the region, depending on which data sets are preferred (Ru & Pigott, 1986;Briais et al, 1993;Schl€ uter et al, 1996;Huchon et al, 1998;Braitenberg et al, 2006;Sun et al, 2009 F ig u r e 3 , 7 A , 1 2 , 1 5 A a n d 1 6 F ig u r e 6 F ig u r e 4 , 7 B , 1 3 , 1 5 D a n the total seismic reflection data coverage analysed in this study.…”

Section: Geologic Settingmentioning

confidence: 99%

See 2 more Smart Citations

Non‐uniform hyper‐extension in advance of seafloor spreading on the vietnam continental margin and the SW South China Sea

Clift

Stephenson

et al. 2014

Basin Research

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The SW South China Sea preserves a propagating oceanic spreading centre and associated continent-ocean transition (COT) that characterizes the continental margin offshore SE Vietnam. We investigated the nature of strain accommodation in the region immediately in front of the propagating rift using a combination of 1-and 2-D backstripping subsidence reconstructions, coupled with forward modelling based on the measured upper crustal extensional faulting applied to a flexural cantilever model. Major normal faulting ceases after an inversion event at ca. 16 Ma, although moderate extension was also noted at 22-23 Ma, representing the end of an extensional phase that initiated around 28 Ma. 1-D subsidence models indicate rapid 'syn-rift' subsidence, possibly lasting until 10 Ma, despite the lack of observed extensional faulting. We show that depth-dependent extension is required to explain the great depth of the basins despite the modest observed upper crustal faulting. Brittle faulting could not have extended much deeper than 10 km, suggestive of weak crust in the presence of high heatflow. The regional topographic slope on the basement suggests very low mid-crustal viscosities of 10 19 -10 20 Pa.s., consistent with the idea that flow in the ductile mid and lower crust was responsible for much of the subsidence prior to, and possibly after, seafloor spreading, which extended ca. 300 km from the tip of the mid ocean ridge. Flow is inferred to be dominant towards the spreading centre prior to 16 Ma. Extension in the COT postdates seafloor spreading and further supports the idea of this crust being very weak, albeit with more coherent, less extended crustal fragments, now forming banks offshore the Sunda continental shelf and surrounded by hyperextended crust of the COT.

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Sedimentary budget of the Southwest Sub‐basin, South China Sea: Controlling factors and geological implications

Ding

Sun

et al. 2018

Geological Journal

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Calculation of the sediment budget in the South China Sea abyssal basin lacks constraints from drilling data and reinterpretation of seismic data. On the basis of six multichannel seismic profiles across the Southwest Sub-basin (SWSB) and the drilling data from International Ocean Discovery Program Expedition 349, we divided the Cenozoic sediments into four sedimentary units. The sedimentary budget of the abyssal basin at different geological times was calculated. The previous works in the Mekong continental shelf and slope areas were integrated to calculate the sediment budget of the whole SWSB. Our researches show that the sediment budget in the SWSB increased during the Palaeogene and reached its first peak because of intensified erosion, which might have resulted from the continued uplift of the Tibetan Plateau and accelerated southeastward extrusion of the Indo-China Peninsula. Since the Late Miocene, the sediment budget was mainly influenced by the East Asia monsoon, that is, the intensified winter monsoon decreased the sediment budget of the entire area during the Late Miocene, whereas the strengthened summer monsoon increased the sediment budget during the Pliocene and reached a peak during the Pleistocene. The sediment budgets of the Mekong continental shelf, the Mekong continental slope, and the abyssal basin have distinct characteristics, relating to the infilling sequence of the terrestrial sediments in different regions. The sediment provenance of the SWSB was mainly from the Indo-China Peninsula, the Nansha area, and the Palawan before the Late Miocene. After that time, sediments were mainly transported from the modern Mekong River.

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The sedimentary, magmatic and tectonic evolution of the southwestern South China Sea revealed by seismic stratigraphic analysis

Cited by 39 publications

References 51 publications

South China Sea Tectonics

South China Sea Tectonics

Non‐uniform hyper‐extension in advance of seafloor spreading on the vietnam continental margin and the SW South China Sea

Sedimentary budget of the Southwest Sub‐basin, South China Sea: Controlling factors and geological implications

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