气候变化领域集成服务门户(CCPortal): Ocean-continent transition architecture and breakup mechanism at the mid-northern South China Sea

CCPortal

DOI	10.1016/j.earscirev.2021.103620
	Ocean-continent transition architecture and breakup mechanism at the mid-northern South China Sea
	Zhang C.; Sun Z.; Manatschal G.; Pang X.; Li S.; Sauter D.; Péron-Pinvidic G.; Zhao M.
发表日期	2021
ISSN	00128252
卷号	217
英文摘要	Ocean-Continent Transition (OCT) located between the edge of the continental and unequivocal oceanic crusts is an ideal laboratory to understand one of the most fundamental processes of Plate Tectonics, namely the formation mechanism of a new plate boundary, also referred to as lithospheric breakup. However, the location and architecture of the OCT and the processes governing the rupture of continental lithosphere and creation of new oceanic crust remain debated. In this paper, we present newly released high-resolution seismic reflection profiles that image the complete transition from unambiguous continental to oceanic crusts in the mid-northern South China Sea (SCS), accompanied with IODP drill holes and gravity data, with the aim to map the OCT and explore where, when and how lithospheric breakup occurred. Based on observations and interpretations of seismic reflection data, we define the limits of the SCS OCT. The results show that the OCT basement corresponds to hybrid crust resulting from the complex interaction between crustal thinning along detachment systems and emplacement of new syn-tectonic igneous materials. The lithospheric breakup in the northern SCS and the conjugate margin occurred asymmetrically and was accomplished by core-complex type structures related to an oceanward transition from tectonic to magma-controlled processes during plate separation. Additionally, the observations suggest a sharp along-strike transition from a lower to an upper plate rifted margin setting over a lateral distance of 30 km. The strong variability in the basement architecture and the abrupt flip in detachment polarity imply a transfer zone to explain the segmentation of the margin. Such segmentation may result from inherited pre-rift crustal and/or lithospheric heterogeneities. Notably, the segmentation did not control breakup and subsequent oceanic accretion. © 2021 Elsevier B.V.
关键词	Breakup Core complex structure IODP Expeditions 367&368&368X Marginal segmentation Ocean-continent transition South China Sea
英文关键词	continental breakup; geological mapping; gravity field; Ocean Drilling Program; ocean-continent transition; segmentation; seismic reflection; Pacific Ocean; South China Sea
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204183
作者单位	Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China; Institut de Physique du Globe de Strasbourg, CNRS-UMR 7516, Université de Strasbourg, Strasbourg Cedex, F-67084, France; CNOOC Ltd.-Shenzhen, Shenzhen, 518054, China; CNOOC Ltd.-Deepwater, Shenzhen, 518054, China; Key Lab of Submarine Geosciences and Prospecting Techniques, MOE, Institute for Advanced Ocean Study, Ocean University of China, Qingdao, 266100, China; Laboratories for Marine Mineral Resources and Marine Geology, National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Geological Survey of Norway, Trondheim, 7040, Norway; Department of Geoscience and Petroleum, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, Norway
推荐引用方式 GB/T 7714	Zhang C.,Sun Z.,Manatschal G.,et al. Ocean-continent transition architecture and breakup mechanism at the mid-northern South China Sea[J],2021,217.
APA	Zhang C..,Sun Z..,Manatschal G..,Pang X..,Li S..,...&Zhao M..(2021).Ocean-continent transition architecture and breakup mechanism at the mid-northern South China Sea.Earth Science Reviews,217.
MLA	Zhang C.,et al."Ocean-continent transition architecture and breakup mechanism at the mid-northern South China Sea".Earth Science Reviews 217(2021).