Seismic stratigraphy and tectonic structure from a composite multi-channel seismic profile across the entire Dangerous Grounds, South China Sea

Ding, Weiwei; Franke, Dieter; Li, Jiabiao; Steuer, Stephan

doi:10.1016/j.tecto.2012.09.026

Cited by 111 publications

(87 citation statements)

References 40 publications

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“…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%

“…Tilted horst blocks form topographic highs with presumably reefs on top (Hutchison and Vijayan 2010). Most extensional structures, including graben and horst, are connected along a lowangle detachment system (Ding et al 2013). This detachment system may have developed in the final stage of rifting as indicated by a decollement system close to the continental-oceanic transition area ).…”

Section: Regional Geological Settingmentioning

confidence: 99%

“…They can also be important for hydrocarbon exploration, because some reefs and carbonate platforms are highly porous and host nearly one half of the world's hydrocarbon reserves, containing some of the largest aquifers on the Earth (Sun and Esteban 1994;Groetsch et al 1998;Wu et al 2008;Sattler et al 2009). Due to geological and geophysical data acquired in the last decades, Cenozoic shallow water carbonates in the South China Sea have been well documented on its (1) detailed seismic features, stratigraphic architecture, and controlling factors in local regions, such as the northern rim of the Dongsha Islands (Tyrell and Christian 1992); the western Pearl River Mouth Basin (Sattler et al 2009); the Qiongdongnan Basin (Wu et al 2008;Ma et al 2011) in the northern continental margin of the South China Sea; the Phu Khanh Basin (Fyhn et al 2009), the offshore of central Vietnam (Fyhn et al 2013) in the western continental margin; the Dangerous Grounds (Ding et al 2013;Franke et al 2013) in the southern continental margin; and (2) regional time-space distributions, control processes and geologic evolution model (Wilson et al 2000;Xu et al 2002;Madden and Wilson 2013).…”

Section: Introductionmentioning

confidence: 99%

“…It also forms a regional unconformity truncating the sequence beneath (Ding et al 2013;Franke et al 2013). Most authors concluded that the carbonate platforms and patch reefs generally developed during the Early Miocene and their formation migrated from E to W and from S to N (Wu et al 2008;Ma et al 2011;Xie et al 2011;Franke et al 2013).…”

Section: Introductionmentioning

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: 99%

Section: Regional Geological Settingmentioning

confidence: 99%

Section: Regional Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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Ages and magnetic structures of the South China Sea constrained by deep tow magnetic surveys and IODP Expedition 349

Lin

et al. 2014

Geochem Geophys Geosyst

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Combined analyses of deep tow magnetic anomalies and International Ocean Discovery Program Expedition 349 cores show that initial seafloor spreading started around 33 Ma in the northeastern South China Sea (SCS), but varied slightly by 1-2 Myr along the northern continent-ocean boundary (COB). A southward ridge jump of 20 km occurred around 23.6 Ma in the East Subbasin; this timing also slightly varied along the ridge and was coeval to the onset of seafloor spreading in the Southwest Subbasin, which propagated for about 400 km southwestward from 23.6 to 21.5 Ma. The terminal age of seafloor spreading is 15 Ma in the East Subbasin and 16 Ma in the Southwest Subbasin. The full spreading rate in the East Subbasin varied largely from 20 to 80 km/Myr, but mostly decreased with time except for the period between 26.0 Ma and the ridge jump (23.6 Ma), within which the rate was the fastest at 70 km/ Myr on average. The spreading rates are not correlated, in most cases, to magnetic anomaly amplitudes that reflect basement magnetization contrasts. Shipboard magnetic measurements reveal at least one magnetic reversal in the top 100 m of basaltic layers, in addition to large vertical intensity variations. These complexities are caused by late-stage lava flows that are magnetized in a different polarity from the primary basaltic layer emplaced during the main phase of crustal accretion. Deep tow magnetic modeling also reveals this smearing in basement magnetizations by incorporating a contamination coefficient of 0.5, which partly alleviates the problem of assuming a magnetic blocking model of constant thickness and

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

et al. 2015

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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.LI ET AL.

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Seismic stratigraphy and tectonic structure from a composite multi-channel seismic profile across the entire Dangerous Grounds, South China Sea

Cited by 111 publications

References 40 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

Ages and magnetic structures of the South China Sea constrained by deep tow magnetic surveys and IODP Expedition 349

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

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