The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea : insights from an OBS experiment
MetadataShow full item record
KeywordSouth China Sea; Southwest subbasin; Magma-poor rifted margins; Hyper-extended crust; Wide-angle reflection and refraction
The continental margins of the southwest subbasin in the South China Sea mark a unique transition from multi-stages magma-poor continental rifting to seafloor spreading. We used reflection and refraction profiles across the margins to investigate the rifting process of the crust. Combining with the other seismic profiles acquired earlier, we focused on the comparative geological interpretation from the result of multichannel seismic analysis and wide-angle seismic tomography. Our result provides the evidence of upper crustal layer with abundant fractures below the acoustic basement with a P-wave velocity from 4.0 to 5.5 km s−1. It indicates extensive deformation of the brittle crust during the continental rifting and can make a good explanation for the observed extension discrepancy in the rift margins of the South China Sea. The seismic chronostratigraphic result shows the possibility of the intra-continental extension center stayed focused for quite a long time in Eocene. Additionally, our evidence suggested that continental margin of the southwest subbasin had experienced at least three rifting stages and the existence of the rigid blocks is an appropriate explanation to the asymmetric rifting of the South China Sea.
Author Posting. © The Author(s), 2016. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Marine Geophysical Research 38 (2017): 105-123, doi:10.1007/s11001-016-9295-y.
Suggested CitationPreprint: Lü, Chuanchuan, Hao, Tianyao, Lin, Jian, Qiu, Xuelin, "The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea : insights from an OBS experiment", 2016-11, https://doi.org/10.1007/s11001-016-9295-y, https://hdl.handle.net/1912/8994
Showing items related by title, author, creator and subject.
A unique seasonal pattern in dissolved elemental mercury in the South China Sea, a tropical and monsoon-dominated marginal sea Tseng, Chun-Mao; Lamborg, Carl H.; Hsu, Shih-Chieh (John Wiley & Sons, 2013-01-16)A unique seasonal pattern in dissolved elemental mercury (DEM) was observed in the tropical monsoon-dominated South China Sea (SCS). The DEM concentration varied seasonally, with a high in summer of 160 ± 40 fM (net evasion ...
Wang, Jinbo (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09)Coupled ocean/atmosphere simulations exhibit systematicwarm biases over the SouthWest African (SWA) coastal region. Recent investigations indicate that coastal ocean dynamics may play an important role in determining the ...
CTD data from coring cruise R/V Cape Hatteras CH1605 on the continental margin of the South Atlantic Bight and the Bahamas Bernhard, Joan M.; McCorkle, Daniel C. (2005-06)These CTD data were collected during a nine-day cruise in early June 2005 on the R/V Cape Hatteras (CH09-05; Beaufort, NC – Beaufort, NC). The principal goal of the cruise was to collect foraminiferal “livestock” for ...