Seismic Structure of the Upper Mantle Beneath Eastern Asia From Full Waveform Seismic Tomography

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dc.citation.firstpage2732en_US
dc.citation.issueNumber8en_US
dc.citation.journalTitleGeochemistry, Geophysics, Geosystemsen_US
dc.citation.lastpage2763en_US
dc.citation.volumeNumber19en_US
dc.contributor.authorTao, Kaien_US
dc.contributor.authorGrand, Stephen P.en_US
dc.contributor.authorNiu, Fenglinen_US
dc.date.accessioned2018-11-01T19:40:04Zen_US
dc.date.available2018-11-01T19:40:04Zen_US
dc.date.issued2018en_US
dc.description.abstractTo better understand the subsurface behavior of subducting slabs and their relation to the tectonic evolution of the overriding plate, we conduct a full waveform inversion on a large data set to determine a high‐resolution seismic model, FWEA18 (Full Waveform inversion of East Asia in 2018), of the upper mantle beneath eastern Asia. FWEA18 reveals sharper, more intense high‐velocity slabs in the upper mantle under the southern Kuril, Japan, and Ryukyu arcs, than previous studies have found. The subducting Pacific plate is imaged as a roughly 100 km thick high‐velocity slab to near 550 km depth indicating relatively little deformation. Stagnation near 600 km depth is observed over horizontal distances of 600 km or less. The Pacific plate we image accounts for roughly 25 Myr of subduction with older slab likely located in the lower mantle. The Philippine plate, subducting beneath the Ryukyu Islands, has a clear termination at about 450 km depth. This may indicate a tearing event in the past or that less Philippine Sea plate has subducted than previously thought. We found a double‐layer high‐velocity anomaly above and below 660 km under the Yellow Sea and eastern coast of North China. This may correspond to parts of the Philippine Sea plate that detached in the past and Pacific plate that have intersected at depth or a complicated behavior of the Pacific plate at that depth. Slow cylindrical anomalies cross the entire upper mantle are imaged beneath major Holocene volcanoes, which are likely upwellings associated with the edges of deep slabs that are entering the lower mantle.en_US
dc.identifier.citationTao, Kai, Grand, Stephen P. and Niu, Fenglin. "Seismic Structure of the Upper Mantle Beneath Eastern Asia From Full Waveform Seismic Tomography." <i>Geochemistry, Geophysics, Geosystems,</i> 19, no. 8 (2018) Wiley: 2732-2763. https://doi.org/10.1029/2018GC007460.en_US
dc.identifier.doihttps://doi.org/10.1029/2018GC007460en_US
dc.identifier.urihttps://hdl.handle.net/1911/103281en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleSeismic Structure of the Upper Mantle Beneath Eastern Asia From Full Waveform Seismic Tomographyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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