气候变化领域集成服务门户(CCPortal): Mesozoic intraplate tectonism of East Asia due to flat subduction of a composite terrane slab

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DOI	10.1016/j.earscirev.2021.103505
	Mesozoic intraplate tectonism of East Asia due to flat subduction of a composite terrane slab
	Liu L.; Liu L.; Xu Y.-G.
发表日期	2021
ISSN	0012-8468
卷号	214
英文摘要	The widespread Middle Jurassic to Early Cretaceous (J2-K1) intraplate tectonism of East Asia has recently been proposed to reflect the flat subduction of the Izanagi plate, whose mechanism, however, remains poorly constrained. Here, we compare these geological records with those within the western United States (U.S.) during the Laramide flat subduction. Two prominent differences are identified during slab advance: 1) western U.S. witnessed continental-scale subsidence and marine inundation, while East Asia experienced mostly basin inversion implying uplift; 2) the landward migrating magmatism in western U.S. quickly evolved into a regional magmatic lull that lasted for >40 Myr, but the East Asian magmatism was largely continuous in space and time. Assisted with numerical models, we show that a flat slab could indeed reproduce the observed East Asian crustal deformation and topographic history during the advance and retreat of the slab. We further find that 1) this slab should be more buoyant than the Laramide slab so that the former oceanic slab could break off which led to surface uplift instead of subsidence, and 2) the crust of the flat slab melted more easily than an oceanic one. The observation that the J2-K1 tectonism was largely contemporary with the assembly (ca. 180–137 Ma) of exotic terranes along the east coast implies that the flat sab underplating North China and Northeast China likely represented subduction of the buoyant continental lithosphere associated with these terranes. The terrane slab could have carried and flattened portions of the nearby oceanic slab with it, forming a giant composite flat slab that defined the J2-K1 intraplate tectonism within East Asia. © 2021 Elsevier B.V.
英文关键词	Flat subduction; Intraplate magmatism; Terrane accretion; Yanshanian Orogeny
语种	英语
scopus关键词	continental lithosphere; intraplate process; Jurassic-Cretaceous boundary; magmatism; Mesozoic; numerical model; orogeny; plate tectonics; slab; subduction; tectonic setting; terrane; uplift; Far East
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/209397
作者单位	Department of Geology, University of Illinois at Urbana-ChampaignUSA, United States; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; CAS Center for Excellence in Deep Earth Sciences, Guangzhou, 510640, China
推荐引用方式 GB/T 7714	Liu L.,Liu L.,Xu Y.-G.. Mesozoic intraplate tectonism of East Asia due to flat subduction of a composite terrane slab[J],2021,214.
APA	Liu L.,Liu L.,&Xu Y.-G..(2021).Mesozoic intraplate tectonism of East Asia due to flat subduction of a composite terrane slab.EARTH-SCIENCE REVIEWS,214.
MLA	Liu L.,et al."Mesozoic intraplate tectonism of East Asia due to flat subduction of a composite terrane slab".EARTH-SCIENCE REVIEWS 214(2021).