globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2019.115932
论文题名:
Lateral evolution of the rift-to-drift transition in the South China Sea: Evidence from multi-channel seismic data and IODP Expeditions 367&368 drilling results
作者: Ding W.; Sun Z.; Mohn G.; Nirrengarten M.; Tugend J.; Manatschal G.; Li J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 531
语种: 英语
中文关键词: breakup ; IODP Expedition 367&368 ; rift-to-drift transition ; South China Sea ; tectono-magmatic processes
英文关键词: Drop breakup ; Geophysical prospecting ; Infill drilling ; Seismic response ; Decompression melting ; Magmatic process ; Multi-channel seismic datum ; Natural laboratories ; Northern South China Sea ; rift-to-drift transition ; South China sea ; Thinned continental crust ; Seismic waves
英文摘要: The South China Sea margins represent a critical natural laboratory to study the processes and parameters controlling the rift-to-drift transition. High quality seismic data previously suggested the occurrence of a relatively sharp transition between the continental and oceanic domains, a hypothesis recently validated by the results of the IODP Expedition 367&368 drilled in the northern South China Sea distal margin. Drilling results in this transition cored Mid-Ocean Ridge type basaltic basement (Site U1502), while its lateral equivalent showed continental affinities (Site U1499). Seismic data document the lateral evolution of this narrow transition zone (∼15 to 25 km wide) and tectono-magmatic context related to breakup. A short-period magmatic event occurred during the latest stage of continental rifting and intruded the edge of the thinned continental crust, triggering crustal breakup and onset of steady-state seafloor spreading. The architecture of the transitional domain documented in this work is in marked contrast with those interpreted as either magma-starved or magma-rich at breakup time, suggesting that the continental margin of the SCS is intermediate between the classical end-member magmatic archetypes. We propose that the magmatic event triggering continental breakup is related to decompression melting linked to the ascending asthenosphere. It is assumed that this event was rapid at geological time scale (<10 Ma) and was favored by a high mantle temperature. © 2019 The Author(s)
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164942
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作者单位: Key Laboratory of Submarine Geosciences, State Oceanic Administration, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; Shanghai Jiao Tong University, School of Oceanography, Shanghai, 20030, China; CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences (CAS), Guangzhou, 510301, China; Laboratoire Géosciences et Environnement Cergy (GEC), Maison Internationale de la Recherche, Université de Cergy-Pontoise, Paris, 95000, France; Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, Paris, F-75005, France; Total SA, R&D department, CSTJF, Pau, 64000, France; Institut de Physique du Globe de Strasbourg, Université de Strasbourg, Strasbourg-CNRSF-67084, France

Recommended Citation:
Ding W.,Sun Z.,Mohn G.,et al. Lateral evolution of the rift-to-drift transition in the South China Sea: Evidence from multi-channel seismic data and IODP Expeditions 367&368 drilling results[J]. Earth and Planetary Science Letters,2020-01-01,531
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