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Effects on the long-wavelength geoid anomaly of lateral viscosity variations caused by stiff subducting slabs, weak plate margins and lower mantle rheology
https://hiroshima.repo.nii.ac.jp/records/2008646
https://hiroshima.repo.nii.ac.jp/records/2008646887c086c-0427-4715-80f2-c0693e5eeffa
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PEPI_172_278.pdf (7.6 MB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||||
| タイトル | ||||||||||
| タイトル | Effects on the long-wavelength geoid anomaly of lateral viscosity variations caused by stiff subducting slabs, weak plate margins and lower mantle rheology | |||||||||
| 言語 | en | |||||||||
| 作成者 |
Yoshida, Masaki
× Yoshida, Masaki
× Nakakuki, Tomoeki
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| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 権利情報 | ||||||||||
| 権利情報 | (c) 2008 Elsevier B.V. All rights reserved. | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | mantle convection | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | numerical calculation | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | subducting slab | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | plate margin | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | viscosity | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | geoid anomaly | |||||||||
| 主題 | ||||||||||
| 主題Scheme | NDC | |||||||||
| 主題 | 450 | |||||||||
| 内容記述 | ||||||||||
| 内容記述 | Instantaneous flow numerical calculations in a three-dimensional spherical shell are employed to investigate the effects of lateral viscosity variations (LVVs) in the lithosphere and mantle on the long-wavelength geoid anomaly. The density anomaly model employed is a combination of seismic tomography and subducting slab models based on seismicity. The global strain-rate model is used to represent weak (low-viscosity) plate margins in the lithosphere. LVVs in the mantle are represented on the basis of the relation between seismic velocity and temperature (i.e., temperature-dependent rheology). When highly viscous slabs in the upper mantle are considered, the observed positive geoid anomaly over subduction zones can be accounted for only when the viscosity contrast between the reference upper mantle and the lower mantle is approximately 103 or lower, and weak plate margins are imposed on the lithosphere. LVVs in the lower mantle exert a large influence on the geoid pattern. The calculated geoid anomalies over subduction zones exhibit generally positive patterns with quite high amplitudes compared with observations, even when the low activation enthalpy of perovskite in the lower mantle is employed. Inferred weak slabs in the lower mantle may be explained in terms of recent mineral physics results, highlighting the possibility of grain-size reduction due to the postspinel phase transition. | |||||||||
| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | Elsevier B.V. | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | AO | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_b1a7d7d4d402bcce | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.1016/j.pepi.2008.10.018 | |||||||||
| 関連情報 | ||||||||||
| 関連タイプ | isVersionOf | |||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | http://dx.doi.org/10.1016/j.pepi.2008.10.018 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0031-9201 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA00773963 | |||||||||
| 開始ページ | ||||||||||
| 開始ページ | 278 | |||||||||
| 書誌情報 |
Physics of the Earth and Planetary Interiors Physics of the Earth and Planetary Interiors 巻 172, 号 3-4, p. 278-288, 発行日 2009-02 |
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| 旧ID | 28631 | |||||||||
