Seismic characteristics of the Huaguang mass transport deposits in the Qiongdongnan Basin, South China Sea: Implications for regional tectonic activity

Wang, Dawei; Wu, Shiguo; Qin, Zhiliang; Spence, G. D.; Lü, Fuliang

doi:10.1016/j.margeo.2013.09.003

Cited by 58 publications

(51 citation statements)

References 23 publications

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“…3). The decreased accumulation space may have led to a significant overspill of sediments from the Southeastern Central Depression into other areas, which is evidenced by the widely distributed mass transport deposits between the Yinggehai Basin and the Phu Khanh Basin(Wang et al, 2013a).In the middle Miocene and Pliocene strata, the contribution from Central Vietnam is scarcely seen in this study mainly due to the low sample coverage in the western part ofthe Yinggehai Basin. Based on an analogy to Hainan Island where rivers were of a similar small scale, sediments from Central Vietnam were probably trapped in the proximal Yingxi Slope during the middle Miocene.…”

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confidence: 72%

Insights from heavy minerals and zircon U–Pb ages into the middle Miocene–Pliocene provenance evolution of the Yinggehai Basin, northwestern South China Sea

Jiang

Cao

Xie

et al. 2015

Sedimentary Geology

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confidence: 72%

Insights from heavy minerals and zircon U–Pb ages into the middle Miocene–Pliocene provenance evolution of the Yinggehai Basin, northwestern South China Sea

Jiang

Cao

Xie

et al. 2015

Sedimentary Geology

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“…Two main sediment sources, the South China Block and the Indochina Block, were active in supplying sediment to the area in the Late Miocene and Pliocene (Yao et al ., ). Large sediment fluxes sourced from the South China Block were deposited in the central and northern QDNB during the Quaternary (Wang et al ., ). However, only a thin Quaternary drape occurred at the southern part of the QDNB (Sun et al ., ).…”

Section: Geological and Oceanographic Settingsmentioning

confidence: 97%

Three‐dimensional seismic characterization of a complex sediment drift in the South China Sea: Evidence for unsteady flow regime

et al. 2016

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This study describes a previously unobserved reflection seismic configuration comprising a honeycomb planform and a repeated erosion/infill cross‐section, based on high‐resolution three‐dimensional/two‐dimensional seismic data and bathymetric data. The honeycomb structures cover an area of more than 5000 km2 and are developed within the Late Miocene to recent deep‐water sediments of the north‐western South China Sea. Linear erosional troughs up to 10 km long and 1 km wide are widely developed in this area, are intimately related to the particular seismic configuration and interpreted to represent a new type of sediment drift that is caused by unsteady bottom current regimes operating since the Late Miocene. The unsteady bottom current regimes are suggested to be triggered by irregular seabed morphologies. Considerable sea‐floor topography was generated as a direct result of tectonic movements in the area since the Late Miocene, and this topography then influenced the pathways of strong bottom currents. This study highlights that: (i) an unsteady bottom current regime can be laterally extensive and persist for millions of years; (ii) structurally controlled sea‐floor relief plays an important role in controlling the depositional pattern; and (iii) the bottom currents were active since the Late Miocene, flowing from the south‐east through the Xisha–Guangle Gateway and crossing the honeycomb structure zone. This study documents a new style of drift and will help to improve current knowledge of palaeoceanography and understanding of the South China Sea deep‐water circulation which is at present still poorly understood.

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“…Moreover, MTDs are usually described along active convergence margins such as the Matakoa Submarine Instability Zone in the New Zealand region [Joanne et al, 2013], or the slides along the Algerian margin [Cattaneo et al, 2010] related to the compressional regime of the convergence between the European and African Plates [Meghraoui and Doumaz, 1996]. They are also common in subsidence zones related to fault reversal, uplift, and regional tilting that generate a change in the steep of the slopes, as in the case of Huaguang MTDs in the South China Sea [Wang et al, 2013].…”

Section: 1002/2015jb012622mentioning

confidence: 99%

Tectonic activity evolution of the Scotia‐Antarctic Plate boundary from mass transport deposit analysis

et al. 2016

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The spatial distribution and temporal occurrence of mass transport deposits (MTDs) in the sedimentary infill of basins and submerged banks near the Scotia‐Antarctic plate boundary allowed us to decode the evolution of the tectonic activity of the relevant structures in the region from the Oligocene to present day. The 1020 MTDs identified in the available data set of multichannel seismic reflection profiles in the region are subdivided according to the geographic and chronological distributions of these features. Their spatial distribution reveals a preferential location along the eastern margins of the eastern basins. This reflects local deformation due to the evolution of the Scotia‐Antarctic transcurrent plate boundary and the impact of oceanic spreading along the East Scotia Ridge (ESR). The vertical distribution of the MTDs in the sedimentary record evidences intensified regional tectonic deformation from the middle Miocene to Quaternary. Intensified deformation started at about 15 Ma, when the ESR progressively replaces the West Scotia Ridge (WSR) as the main oceanic spreading center in the Scotia Sea. Coevally with the WSR demise at about 6.5 Ma, increased spreading rates of the ESR and numerous MTDs were formed. The high frequency of MTDs during the Pliocene, mainly along the western basins, is also related to greater tectonic activity due to uplift of the Shackleton Fracture Zone by tectonic inversion and extinction of the Antarctic‐Phoenix Ridge and involved changes at late Pliocene. The presence of MTDs in the southern Scotia Sea basins is a relevant indicator of the interplay between sedimentary instability and regional tectonics.

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Seismic characteristics of the Huaguang mass transport deposits in the Qiongdongnan Basin, South China Sea: Implications for regional tectonic activity

Cited by 58 publications

References 23 publications

Insights from heavy minerals and zircon U–Pb ages into the middle Miocene–Pliocene provenance evolution of the Yinggehai Basin, northwestern South China Sea

Insights from heavy minerals and zircon U–Pb ages into the middle Miocene–Pliocene provenance evolution of the Yinggehai Basin, northwestern South China Sea

Three‐dimensional seismic characterization of a complex sediment drift in the South China Sea: Evidence for unsteady flow regime

Tectonic activity evolution of the Scotia‐Antarctic Plate boundary from mass transport deposit analysis

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