气候变化领域集成服务门户(CCPortal): The thermal imprint of continental breakup during the formation of the South China Sea

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DOI	10.1016/j.epsl.2019.115972
	The thermal imprint of continental breakup during the formation of the South China Sea
	Nirrengarten M.; Mohn G.; Schito A.; Corrado S.; Gutiérrez-García L.; Bowden S.A.; Despinois F.
发表日期	2020
ISSN	0012821X
卷号	531
英文摘要	The stretching of continental lithosphere results in asthenospheric upwelling, raising of isotherms, melting during decompression and eventually seafloor spreading. The thermal maturity of overlying sedimentary organic matter from these settings would be expected to be distinctly altered by these processes, however this is still poorly constrained and quantitatively unexplored. International Ocean Discovery Program (IODP) Expeditions 367–368 cored sediments at the Continent Ocean Transition (COT) on the Northern Margin of the South China Sea (SCS). From two settings at the South East China COT we measured and modelled thermal maturity in pre-/syn- to post-rift sediments making use of a range of thermal maturity parameters. Various heat-flow evolutionary scenarios were investigated, with notable jumps in thermal maturity for sediments corresponding to different depositional packages. In order to match observations of thermal maturity, it was found that the deeper and likely pre-rift sediments were heated to temperatures as high as 200 °C during initial breakup. Achieving this temperature for the deeper sediments requires that significant additional heat be imparted at shallow depths (e.g. exposure to at least the far-field effects of a magmatic intrusion or subsurface expressions of volcanism). The post-rift sediments have lower thermal maturities which are likely due to limited burial and the absence of late post-rift magmatism. The comparison of the SE China COT with other margin examples highlights some parameters controlling the thermal evolution and its record. © 2019 The Authors
关键词	continental breakup IODP 367-368 SE China Margin thermal evolution
英文关键词	Lithology; Continent-ocean transition; Continental break-up; Continental lithosphere; IODP 367-368; Magmatic intrusions; Se chinas; Sedimentary organic matter; Thermal evolution; Sediments; continental breakup; heat flow; magmatism; rifting; seafloor spreading; thermal evolution; thermal maturity; Pacific Ocean; South China Sea; Calluna vulgaris
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202808
作者单位	Département Géosciences et Environnement, Université de Cergy-Pontoise, Cergy-Pontoise, France; Università degli Studi di Roma Tre, Dipartimento di Scienze, Sezione di Scienze Geologiche, Largo San Leonardo Murialdo 1, Rome, 00146, Italy; Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, AB24 3UE, United Kingdom; Total SA Frontier Exploration R&D Program, CSTJF, Pau, France
推荐引用方式 GB/T 7714	Nirrengarten M.,Mohn G.,Schito A.,et al. The thermal imprint of continental breakup during the formation of the South China Sea[J],2020,531.
APA	Nirrengarten M..,Mohn G..,Schito A..,Corrado S..,Gutiérrez-García L..,...&Despinois F..(2020).The thermal imprint of continental breakup during the formation of the South China Sea.Earth and Planetary Science Letters,531.
MLA	Nirrengarten M.,et al."The thermal imprint of continental breakup during the formation of the South China Sea".Earth and Planetary Science Letters 531(2020).