气候变化领域集成服务门户(CCPortal): P and S wave tomography of east-central China: insight into past and present mantle dynamics

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DOI	10.1016/j.tecto.2021.228859
	P and S wave tomography of east-central China: insight into past and present mantle dynamics
	Huang Z.; Gou T.; Wang L.
发表日期	2021
ISSN	00401951
卷号	809
英文摘要	East-central China has experienced multi-stage evolution among different tectonic units; thus the present geological structures are superimposed in a long history. But it is still unclear how different tectonic processes interact with each other, especially how the subsequent activity affects the previous structures. In this study, we determined new high-resolution P and S wave tomography of the upper mantle beneath the east-central China. We imaged the stagnant Pacific slab in the mantle transition zone and the hot low-velocity upper mantle in eastern China while cold high-velocity bodies beneath the Archean cratons in central China. More importantly, we newly revealed two important features. Firstly, a high-velocity zone is found in the uppermost mantle (50–150 km) beneath the Southeast China; its location is comparable to the distribution of the Cretaceous igneous rocks. Thus, we propose that the high-velocity anomalies reflect the remnant mafic rocks in the upper mantle after the volcanic eruption. Secondly, a high-velocity body is revealed in the deep upper mantle (300–500 km) beneath the southwestern Yangtze craton, possibly implying the delaminated cratonic lithosphere in the Early Mesozoic. © 2021 Elsevier B.V.
关键词	East-central China Lithospheric delamination Mantle wedge convection Seismic tomography Stagnant Pacific slab
英文关键词	Structural geology; Tectonics; Tomography; Velocity; Volcanic rocks; Volcanoes; Deep upper mantle; Geological structures; Important features; Mantle transition zone; Past and present; Tectonic process; Uppermost mantle; Volcanic eruptions; Shear waves; lithospheric structure; mafic rock; mantle convection; P-wave; S-wave; seismic tomography; slab; transition zone; upper mantle; China
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207989
作者单位	State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
推荐引用方式 GB/T 7714	Huang Z.,Gou T.,Wang L.. P and S wave tomography of east-central China: insight into past and present mantle dynamics[J],2021,809.
APA	Huang Z.,Gou T.,&Wang L..(2021).P and S wave tomography of east-central China: insight into past and present mantle dynamics.Tectonophysics,809.
MLA	Huang Z.,et al."P and S wave tomography of east-central China: insight into past and present mantle dynamics".Tectonophysics 809(2021).