气候变化领域集成服务门户(CCPortal): Layered mantle heterogeneities associated with post-subducted slab segments

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DOI	10.1016/j.epsl.2021.117115
	Layered mantle heterogeneities associated with post-subducted slab segments
	Yu Y.; Xu Z.; Gao S.S.; Liu K.H.; Gao J.
发表日期	2021
ISSN	0012821X
卷号	571
英文摘要	The South China Sea (SCS) is a hydrocarbon-rich major marginal sea in the western Pacific Ocean. One of the proposed driving mechanisms for its formation is the slab-pull of a Mesozoic ocean basin known as the Proto-South China Sea (PSCS), which subducted beneath northern Borneo between the Eocene and the early Miocene. However, the present-day depth extent of the slabs and even the existence of the PSCS remain highly debated. By stacking P-to-S conversions from the 410 km and 660 km discontinuities bordering the mantle transition zone (MTZ), we demonstrate significant MTZ thickening beneath the southern margin of the SCS, which, when combined with previously-revealed high-velocity anomalies in the MTZ, provides evidence for the existence of the PSCS. Chemically and rheologically heterogeneous materials segregated from the slab segments may have generated layered structures as evidenced by the discontinuities observed at the depths of ∼350 km and ∼730 km. Dehydration melting from the slab segments may be a viable mechanism for the extensive post-spreading magmatism in the southern SCS. © 2021 Elsevier B.V.
关键词	mantle heterogeneities mantle transition zone post-subducted slab segments receiver function South China Sea
英文关键词	Driving mechanism; Mantle heterogeneity; Mantle transition zone; Marginal seas; Pacific ocean; Post-subducted slab segment; Receiver functions; Slab pull; South China sea; Western Pacific; Oceanography
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/203359
作者单位	State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; National Marine Environmental Forecasting Center, Beijing, 100081, China; Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, MO 65409, United States
推荐引用方式 GB/T 7714	Yu Y.,Xu Z.,Gao S.S.,et al. Layered mantle heterogeneities associated with post-subducted slab segments[J],2021,571.
APA	Yu Y.,Xu Z.,Gao S.S.,Liu K.H.,&Gao J..(2021).Layered mantle heterogeneities associated with post-subducted slab segments.Earth and Planetary Science Letters,571.
MLA	Yu Y.,et al."Layered mantle heterogeneities associated with post-subducted slab segments".Earth and Planetary Science Letters 571(2021).