The South China Sea – Rifting and the Evolution of a Marginal Basin

Pubellier, Manuel; Chang, Sung‐Ping; Delescluse, Matthias

doi:10.1002/9781119986959.ch5

Cited by 2 publications

(1 citation statement)

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“…Many Cenozoic unconformities have been identified in the conjugate margins of the SCS (Morley, 2016;Lunt, 2019), exhibiting a diachronous opening from east to southwest (Franke et al, 2014;Chang, 2020;Luo et al, 2021;Pubellier et al, 2021). The identification of those unconformities leads to the definition of a breakup sequence for the SCS margin (Zhao et al, 2016;Alves et al, 2020) which is the sedimentary record during the phase of the diachronic lithospheric breakup (Early Oligocene to Early Miocene).…”

Section: Geological Backgroundmentioning

confidence: 99%

Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup

Chang

Pubellier

Delescluse

et al. 2022

Marine and Petroleum Geology

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Section: Geological Backgroundmentioning

confidence: 99%

Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup

Chang

Pubellier

Delescluse

et al. 2022

Marine and Petroleum Geology

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The crustal structure of the southwestern South China Sea from seismic reflection and refraction data: Implications to continental breakup, slow-spreading ridges, and subsequent mantle activity

Jiang,

Wang,

et al. 2024

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The crustal structures of the continent-ocean transition (COT) zone and oceanic domain are key to revealing the tectono-magmatic evolution from rift to drift and the following seafloor spreading. We present a comprehensive study of deep seismic reflection imaging and tomographic inversion of a wide-angle seismic line that runs across the COT and extinct spreading center of the Southwest Subbasin (SWSB) in the South China Sea. We revealed a low velocity (<3 km/s) region in the shallow upper crust of the Longmen seamount, which may represent serpentinized mud or volcanoclastic. The mature oceanic crust is ca. 4–6 km thick with high-velocity bodies (7.2–7.5 km/s) overlapping the Moho, reflecting relatively rich magmatic additions during seafloor spreading. Both the northern and southern COT segments exhibit a prominent long-wavelength high magnetic anomaly and syn-breakup volcano, indicating magmatic additions in the lower crust and lava flows with magma ascending along faults to the surfaces. However, the COT in the south is wider than that in the north. In addition, the southern COT is characterized by limited PmP reflections, well-developed rotated fault blocks and ocean-ward syn-rifting faults, and a low velocity (7.5–7.8 km/s) upper mantle, suggesting the southern COT is probably underlain by a local serpentinized mantle during continental lithosphere breakup. The differences between the southern and northern COTs on the origin of high velocity lower crustal layers and faulting styles implies asymmetric continental breakup processes in the SWSB.

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The South China Sea – Rifting and the Evolution of a Marginal Basin

Cited by 2 publications

References 74 publications

Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup

Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup

The crustal structure of the southwestern South China Sea from seismic reflection and refraction data: Implications to continental breakup, slow-spreading ridges, and subsequent mantle activity

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