气候变化领域集成服务门户(CCPortal): Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China

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DOI	10.1016/j.tecto.2019.228208
	Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China
	Wang Y.; He Y.; Lu G.; Wen L.
发表日期	2020
ISSN	00401951
卷号	775
英文摘要	The structure of Earth's mantle transition zone (MTZ) contains important information about how oceanic plates are recycled into the mantle. However, morphologies of stagnant slab in the MTZ inferred from seismic studies remain controversial. Here, we conduct combined geodynamic, mineral physical and seismologic modeling to infer fine features of the stagnant slab in the MTZ beneath southeastern China. This method applies mineral physics modeling in combination with geodynamically consistent thermal anomalies to predict seismic velocity structures in the MTZ that are used in triplication waveform modeling. The synthetic waveforms are systematically compared with observed data using a grid search optimization. Our best-fit model reveals a stagnant slab lying at the bottom of the MTZ with a peak temperature reduction of 350 ± 80 K and a thickness of 85 ± 20 km, indicating that it underwent little deformation. By joint modeling of the mineral physics and thermal history of the slab, our approach improves estimates of both the thickness and temperature of the stagnant slab and provides a better understanding of the paleo subduction system beneath southeastern China. © 2019 Elsevier B.V.
关键词	Mantle transition zone Mineralogical modeling Stagnant slab Thermal structure Triplication waveform modeling
英文关键词	Geodynamics; Minerals; Seismology; Waveform analysis; Compositional structure; Mantle transition zone; Peak temperatures; Seismic velocity structure; Southeastern china; Stagnant slabs; Thermal structure; Waveform modeling; Search engines; geodynamics; mantle source; seismic data; seismic source; slab; structural geology; transition zone; waveform analysis
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/207897
作者单位	Laboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; National Geophysics Observatory at MengchengAnhui 233500, China; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences (CAS), Beijing, 100029, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, CAS, Beijing, 100101, China; Innovation Academy for Earth Science, CAS, Beijing, 10029, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Geosciences, State University of New York at Stony Brook, Stony Brook, NY 11794, United States
推荐引用方式 GB/T 7714	Wang Y.,He Y.,Lu G.,et al. Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China[J],2020,775.
APA	Wang Y.,He Y.,Lu G.,&Wen L..(2020).Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China.Tectonophysics,775.
MLA	Wang Y.,et al."Seismic, thermal and compositional structures of the stagnant slab in the mantle transition zone beneath southeastern China".Tectonophysics 775(2020).