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Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia
Chen, Chuanxu1,2; Zhao, Dapeng1; Tian, You3; Wu, Shiguo2; Hasegawa, Akira1; Lei, Jianshe4; Park, Jung-Ho5; Kang, Ik-Bum5; Chuanxu Chen
2017-04-01
Source PublicationGEOPHYSICAL JOURNAL INTERNATIONAL
Volume209Issue:1Pages:68-85
Abstract

3-D P- and S-wave velocity structures of the mantle down to a depth of 800 km beneath NE Asia are investigated using similar to 981 000 high-quality arrival-time data of local earthquakes and teleseismic events recorded at 2388 stations of permanent and portable seismic networks deployed in NE China, Japan and South Korea. Our results do not support the existence of a gap (or a hole) in the stagnant slab under the Changbai volcano, which was proposed by a previous study of teleseismic tomography. In this work we conducted joint inversions of both local-earthquake arrival times and teleseismic relative traveltime residuals, leading to a robust tomography of the upper mantle and the mantle transition zone (MTZ) beneath NE Asia. Our joint inversion results reveal clearly the subducting Pacific slab beneath the Japan Islands and the Japan Sea, as well as the stagnant slab in the MTZ beneath the Korean Peninsula and NE China. A big mantle wedge (BMW) has formed in the upper mantle and the upper part of the MTZ above the stagnant slab. Localized low-velocity anomalies are revealed clearly in the crust and the BMW directly beneath the active Changbai and Ulleung volcanoes, indicating that the intraplate volcanism is caused by hot and wet upwelling in the BMW associated with corner flows in the BMW and deep slab dehydration as well.

SubtypeArticle
KeywordMantle Processes Earthquake Dynamics Subduction Zone Processes Intra-plate Processes Hotspots Asia
Subject Area海洋地球物理学
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/gji/ggw491
Indexed BySCI
Language英语
WOS KeywordSEISMIC STRUCTURE BENEATH ; EAST-ASIA ; P-WAVE ; ELECTRICAL-CONDUCTIVITY ; JAPANESE ISLANDS ; POSSIBLE LINK ; TOMOGRAPHY ; CHINA ; SUBDUCTION ; PLUMES
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000396820600005
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/1828
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorChuanxu Chen
Affiliation1.Tohoku Univ, Dept Geophys, Sendai, Miyagi 9808578, Japan
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
3.Jilin Univ, Coll Geoexplorat Sci & Technol, Changchun, Peoples R China
4.China Earthquake Adm, Inst Crustal Dynam, Beijing, Peoples R China
5.Korea Inst Geosci & Mineral Resources, Daejeon, South Korea
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Chen, Chuanxu,Zhao, Dapeng,Tian, You,et al. Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2017,209(1):68-85.
APA Chen, Chuanxu.,Zhao, Dapeng.,Tian, You.,Wu, Shiguo.,Hasegawa, Akira.,...&Chuanxu Chen.(2017).Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia.GEOPHYSICAL JOURNAL INTERNATIONAL,209(1),68-85.
MLA Chen, Chuanxu,et al."Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia".GEOPHYSICAL JOURNAL INTERNATIONAL 209.1(2017):68-85.
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