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Radial and Azimuthal Anisotropy Tomography of the NE Japan Subduction Zone: Implications for the Pacific Slab and Mantle Wedge Dynamics
https://nied-repo.bosai.go.jp/records/2863
https://nied-repo.bosai.go.jp/records/2863a48211f1-ff1b-4aea-ae05-2e5af09049d1
Item type | researchmap(1) | |||||||||||||
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公開日 | 2023-03-30 | |||||||||||||
タイトル | ||||||||||||||
言語 | en | |||||||||||||
タイトル | Radial and Azimuthal Anisotropy Tomography of the NE Japan Subduction Zone: Implications for the Pacific Slab and Mantle Wedge Dynamics | |||||||||||||
言語 | ||||||||||||||
言語 | eng | |||||||||||||
著者 |
Motoko Ishise
× Motoko Ishise
× Hitoshi Kawakatsu
× Manabu Morishige
× Katsuhiko Shiomi
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抄録 | ||||||||||||||
内容記述タイプ | Other | |||||||||||||
内容記述 | We investigate slab and mantle structure of the NE Japan subduction zone from P wave azimuthal and radial anisotropy using travel time tomography. Trench normal E-W-trending azimuthal anisotropy (AA) and radial anisotropy (RA) with VPV > VPH are found in the mantle wedge, which supports the existence of small-scale convection in the mantle wedge with flow-induced LPO of mantle minerals. In the subducting Pacific slab, trench parallel N-S-trending AA and RA with VPH > VPV are obtained. Considering the effect of dip of the subducting slab on apparent anisotropy, we suggest that both characteristics can be explained by the presence of laminar structure, in addition to AA frozen-in in the subducting plate prior to subduction. |
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言語 | en | |||||||||||||
書誌情報 |
en : Geophysical Research Letters 巻 45, 号 9, p. 3923-3931, 発行日 2018-05-16 |
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出版者 | ||||||||||||||
言語 | en | |||||||||||||
出版者 | Blackwell Publishing Ltd | |||||||||||||
ISSN | ||||||||||||||
収録物識別子タイプ | EISSN | |||||||||||||
収録物識別子 | 1944-8007 | |||||||||||||
DOI | ||||||||||||||
関連識別子 | 10.1029/2018GL077436 |