The South China sea margins: Implications for rifting contrasts

Hayes, Dennis E.; Nissen, Susan Spangler

doi:10.1016/j.epsl.2005.06.017

Cited by 134 publications

(81 citation statements)

References 16 publications

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“…where H sed is sediment thickness; H c is gravity-derived crustal thickness (see Appendix A, Parker 1973;Kuo & Forsyth 1988) calibrated with seismic data (Qiu et al 2001;Yan et al 2001;Hayes & Nissen A total of 400 across-trench profiles were taken westward of the trench axis with the eastern ends of the profiles located at the Manila trench axis (marked by colour dots and shaded area). Each profile is perpendicular to the local strike of the trench axis.…”

Section: Observational Constraintsmentioning

confidence: 99%

Intra- and intertrench variations in flexural bending of the Manila, Mariana and global trenches: implications on plate weakening in controlling trench dynamics

Zhang

Lin

Zhou

et al. 2017

Geophysical Journal International

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S U M M A R YWe conducted detailed analyses of a global array of trenches, revealing systematic intra-and intertrench variations in plate bending characteristics. The intratrench variations of the Manila and Mariana Trenches were analysed in detail as end-member cases of the relatively young (16-36 Ma) and old (140-160 Ma) subducting plates, respectively. Meanwhile, the intertrench variability was investigated for a global array of additional trenches including the Philippine, Kuril, Japan, Izu-Bonin, Aleutian, Tonga-Kermadec, Middle America, Peru, Chile, Sumatra and Java Trenches. Results of the analysis show that the trench relief (W 0 ) and width (X 0 ) of all systems are controlled primarily by the faulting-reduced elastic thickness near the trench axis (T m e ) and affected only slightly by the initial unfaulted thickness (T M e ) of the incoming plate. The reduction in T e has caused significant deepening and narrowing of trench valleys. For the cases of relatively young or old plates, the plate age could be a dominant factor in controlling the trench bending shape, regardless the variations in axial loadings. Our calculations also show that the axial loading and stresses of old subducting plates can vary significantly along the trench axis. In contrast, the young subducting plates show much smaller values and variations in axial loading and stresses.

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Section: Observational Constraintsmentioning

confidence: 99%

Intra- and intertrench variations in flexural bending of the Manila, Mariana and global trenches: implications on plate weakening in controlling trench dynamics

Zhang

Lin

Zhou

et al. 2017

Geophysical Journal International

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“…The earlier initiation of seafloor spreading in the Eastern Sub-Basin has probably a deep origin. Since the Mesozoic Pacific Plate was subducting from the east, the eastern part of the SCS is relatively prone to spreading probably due to the residual effect of the lithospheric temperature perturbations associated with subduction [56].…”

Section: From Active To Passive Marginmentioning

confidence: 99%

Tracing the life history of a marginal sea—On “The South China Sea Deep” Research Program

Wang

2012

Chin. Sci. Bull.

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the first large-scale basic-research program in ocean science in the country aiming to reconstruct the life history of a marginal sea. The overall scientific objective of the program is to dissect this typical marginal sea by studying its history of evolution and its modern processes, including the following three major components: (1) Development of the deep basin: utilizing new techniques to re-measure magnetic anomaly lineations, to explore the deep tectonic features, to drill the oceanic crust, and to study volcanic seamount chains; (2) deep-water sediments: observing the modern processes to reveal the patterns of deep-water circulations and sedimentation, analyzing deep-sea sediments to recognize paleoceanographic response to basin evolution, and subsequently to bridge the modern and paleo-studies of the deep-sea processes; and (3) biogeochemical processes: using a variety of techniques including deploying submarine observation and deep-water diving device to investigate the distribution patterns and environmental impacts of deepwater seepages and subbottom circulation, and to reveal the role of microbes in deep-sea carbon cycling. As compared with the open ocean and other marginal seas, the South China Sea enjoys many more advantages as a marine basin for reconstructing the life history. Meanwhile, the South China Sea Deep Program provides unique opportunities in studying the evolution and variations of the sea-land interactions between the Pacific and Asia.the South China Sea Deep, marginal sea, deep-sea process, life history, tectonic evolution, sedimentological response, biogeochemistry Citation:Wang P X. Tracing the life history of a marginal

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“…We support the suggestion that these canyons originated in conjunction with the opening of the South China Sea and the subsequent thermal subsidence on its northern continental margin. Past research has provided evidence for the extraordinarily rapid and persistent thermal subsidence in the Baiyun Sag since the Miocene (Clift and Lin 2001;Clift et al 2002a;Hayes and Nissen 2005;Zhou et al 2009). The shelf break was originally located more to the south at the opening of the South China Sea *30 Ma, and subsequently has migrated north of the Baiyun Sag, where it remains.…”

Section: Origin and Sedimentary Processesmentioning

confidence: 99%

Morphotectonics and evolutionary controls on the Pearl River Canyon system, South China Sea

Ding

Li³

et al. 2013

Mar Geophys Res

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The Pearl River Canyon system is a typical canyon system on the northern continental slope of the South China Sea, which has significant implications for hydrocarbon exploration. Through swath bathymetry in the canyon area combined with different types of seismic data, we have studied the morphotectonics and controlling factors of the canyon by analyzing its morphology and sedimentary structure, as well as the main features of the continental slope around the canyon. Results show that the Pearl River Canyon can be separated into three segments with different orientations. The upper reach is NW-oriented with a shallowly incised course, whereas the middle and lower reaches, that are located mainly in the Baiyun Sag, have a broad U-shape and have experienced consistent deposition. Seventeen deeply-cut canyons have developed in the slope north of the Baiyun Sag, playing an important role in the sedimentary processes of the middle and lower reaches of the Pearl River Canyon. These canyons display both asymmetrical V-and U-shapes along their lengths. Numerous buried channels can be identified below the modern canyons with unidirectionally migrating stacking patterns, suggesting that the canyons have experienced a cyclic evolution with several cut and fill phases of varying magnitude. These long established canyons, rather than the upper reach of the Pearl River Canyon, are the main conduits for the transport of terrigenous materials to the lower slope and abyssal basin during lowstand stage, and have contributed to the formation of vertically stacked deep-water fans in the middle reach. Canyon morphology is interpreted as a result of erosive sediment flows. The Pearl River Canyon and the 17 canyons in the slope area north of the Baiyun Sag probably have developed since the Miocene. Cenozoic tectonics, sea level change and sediment supply jointly control the morphology and sedimentary structure. The middle and lower reaches of the Pearl River Canyon developed on the paleo-terrain of the Baiyun Sag, which has been a persistently rapid depositional environment, receiving most of the materials transported via the canyons.

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The South China sea margins: Implications for rifting contrasts

Cited by 134 publications

References 16 publications

Intra- and intertrench variations in flexural bending of the Manila, Mariana and global trenches: implications on plate weakening in controlling trench dynamics

Intra- and intertrench variations in flexural bending of the Manila, Mariana and global trenches: implications on plate weakening in controlling trench dynamics

Tracing the life history of a marginal sea—On “The South China Sea Deep” Research Program

Morphotectonics and evolutionary controls on the Pearl River Canyon system, South China Sea

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