Tectonic-stratigraphic division and blind fold structures in Nansha Waters, South China Sea

Yan, Ping; Hai-ling, Liu

doi:10.1016/j.jseaes.2003.12.005

Cited by 83 publications

(66 citation statements)

References 19 publications

(38 reference statements)

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“…A Paleozoic and/or Mesozoic basement may be inferred based on dredge samples and limited wells. The sampled rocks show a close affinity to those of Southeast Asia, suggesting that the Reed Bank area once was a part of the South China Continent (Hutchison 2004;Kudrass et al 1986;Yan and Liu 2004). After a Cretaceous to Late Paleogene period of rifting, which led to the formation of numerous NE-SW trending half-grabens, the continental fragments were finally separated from the South China continent by seafloor spreading Hayes 1983, Taylor andHayes 1983;Briais et al 1993).…”

Section: Regional Geological Settingmentioning

confidence: 92%

“…A time to depth conversion has been carried out in order to construct the cross sections used for subsidence analysis. The time-velocity statics over the Reed Bank area for subsidence analysis has been adopted according to Yan and Liu (2004). A set of artificial wells has been constructed along our two seismic profiles in order to recover the tectonic component of subsidence in the study area and the backstripping technique (Steckler and Watts 1978) has been used.…”

Section: Datasets and Methodsmentioning

confidence: 99%

“…The submarine topography of this area is characterized by different morphologies, such as coral reefs, seamounts, sea knolls, canyons, scattered throughout this area. It is generally accepted that the Reed Bank area, as the Dangerous Grounds, constitutes stretched crust of continental origin (Holloway 1982;Taylor and Hayes 1983;Yan and Liu 2004;Cullen et al 2010;Ding et al 2013).…”

Section: Regional Geological Settingmentioning

confidence: 99%

“…Unlike the rifted basins at the northern continental margin of the South China Sea, the horst and graben structures in the Dangerous Grounds are bathymetrically expressed (Yan and Liu 2004;Ding et al 2013). Tilted horst blocks form topographic highs with presumably reefs on top (Hutchison and Vijayan 2010).…”

Section: Regional Geological Settingmentioning

confidence: 99%

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Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

Ding

Dong

et al. 2014

Mar Geophys Res

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We have analyzed two recently acquired multichannel seismic profiles across the Reed Bank area, South China Sea. A detailed seismic interpretation coupled with drilling data has proved the occurrence of a wide carbonate platform, developed between the Late Oligocene and the Early Miocene (32-20 Ma). The top of these carbonates is an important regional unconformity, corresponding to a strong and continuous seismic reflector. An age of about 20 Ma is inferred for this reflector, acting as a regional unconformity marking the cessation of seafloor spreading with an erosional/non-depositional hiatus, spanning 3 or 4 m.y. The time interval during which the carbonate platforms formed is concurrent with the opening of the South China Sea. The reconstruction of the tectonic subsidence in this area has shown a decrease in rate of subsidence during the drifting stage (32-17 Ma), indicating that the whole Reed Bank area was in a tectonically stable and shallow water environment for more than 10 m.y., favoring the development of shallow water carbonates. With a sharply increased subsidence rate after the end of spreading (17 Ma) and a continuously increased sea level, the carbonate platforms were drowned and died, except some structural highs with reef buildups, where the carbonate sedimentation continued to Middle Miocene. We suggest that delayed tectonic subsidence in Reed Bank area might have been related to a secondary mantle convection under the rift lasting more than about 10 m.y.

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Section: Regional Geological Settingmentioning

confidence: 92%

Section: Datasets and Methodsmentioning

confidence: 99%

Section: Regional Geological Settingmentioning

confidence: 99%

Section: Regional Geological Settingmentioning

confidence: 99%

See 2 more Smart Citations

Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

Ding

Dong

et al. 2014

Mar Geophys Res

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“…Only the middle portion of the B-B' profile (close to the western Dongsha-Penghu Uplift) shows different characteristics with a contractional structure in the Mesozoic formation. This is critical to the tectonics of this region but has not been discussed until the drilling of well MZ-1-1 (Yan and Liu 2004;Shi and Li 2012;Yan et al 2014). Therefore, in this study, we have focused on the western Dongsha-Penghu Uplift area and tried to decipher the Mesozoic tectonic history of the northern Ru and Pigott (1986), Clift and Lin (2001), Shi et al (2005), Zhou et al (2008), and seismic profiles in this study.…”

Section: Introductionmentioning

confidence: 99%

Structural inversion in the northern South China Sea continental margin and its tectonic implications

Huang

Lee²,

et al. 2017

Terr. Atmos. Ocean. Sci.

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The northern South China Sea (SCS) continental margin was proposed to be an active margin during the Mesozoic. However, only a few papers discussed the Mesozoic structural evolution in this region. Here, we provide information based on the seismic profile interpretations with age control from biostratigraphic studies and detrital zircon U-Pb dates of well MZ-1-1 in the western Dongsha-Penghu Uplift of the northern SCS continental margin. The industrial seismic profiles reveal evidence for structural inversion as represented by folds and high-angle reverse faults, formed by reactivation of pre-existing normal faults. The inversion event likely started after the Early Cretaceous, and developed in Late Cretaceous, but ceased before the Cenozoic. The areal extent of the structural inversion was restricted in the western Dongsha-Penghu Uplift and was approximately 100 km in width. Based on the paleogeographic reconstruction of SCS, the structural inversion was likely formed by a collision between the seamount (volcanic islands) swarm of the current North Palawan block (mainly the Calamian Islands) and the northern SCS continental margin around Late Cretaceous.

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Gravity Inversion and Thermal Modeling for the Crust‐Mantle Structure of the Southwest Subbasin in the South China Sea

Zhang

2011

Chinese J of Geophysics

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The crust‐mantle structure and magmatic activity are one of the key problems in the study on formation and evolution of the southwest subbasin in the South China Sea. According to gravity data from the NH973‐1 profile, we construct a density model of crust‐mantle structure with the gravity inversion method. And then, we make modeling of the temperature structure and thermal evolution in the basin after sea‐floor spreading. Gravity inversion indicates that there is a deeper sunken sedimentation area and a depressed Moho surface region under the southwest subbasin center. Thermal modeling shows that temperature variation is not consistency degradation between crust and mantle, but in a way of crust warming with mantle cooling. After the termination of floor spreading, the crust warming lasted for about 7 Ma, followed by slow cooling, also with the mantle. Then, crust thermal evolution mode was changed into a new way that its temperature declined as same as mantle. In this way, crust and mantle entered the stage of thermal subsiding synchronously. Along profile NH973‐1, the characteristics of crustal warming are different among the south, middle and north parts. At the depth of 7~9 km under the place, about 70 km to the north of the oceanic basin spreading center, the rate of temperature increase sustained above 200°C between 9.6 Ma and 4.6 Ma. This appending temperature would drive up the local temperature value to 1100°C which was of advantage to crust magmatic activity in the end time of seabed spreading, supported by the P‐T diagram. We infer that magmatic partial melting would be likely to happen at this time if there was water‐bearing and decompressing conditions in crust produced by local faults.

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Tectonic-stratigraphic division and blind fold structures in Nansha Waters, South China Sea

Cited by 83 publications

References 19 publications

Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

Structural inversion in the northern South China Sea continental margin and its tectonic implications

Gravity Inversion and Thermal Modeling for the Crust‐Mantle Structure of the Southwest Subbasin in the South China Sea

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