Numerical experiments of mantle convection in a Big Mantle Wedge associated with subducting plates
| Project/Area Number |
26400457
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Ehime University |
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Principal Investigator |
KAMEYAMA MASANORI 愛媛大学, 地球深部ダイナミクス研究センター, 教授 (70344299)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | マントル対流 / 数値シミュレーション / プレート沈み込み / 停滞スラブ / 海溝後退 / 大きなマントルウェッジ |
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| Outline of Final Research Achievements |
In this study we have newly constructed simulation programs of mantle convection near the subduction zones, by extending our own techniques. The new programs have been utilized for numerical experiments on the dynamic behaviors of the slabs of cold descending plates near the base of the upper mantle. The series of our experiments demonstrated that the formation and avalanche of stagnant slabs are strongly related with the trench retreat particularly through its temporal changes. These findings may further imply that our study can offer important clues to the understanding of tectonic histories of subduction zones (such as the trench migration and back-arc opening), by properly combining with the observations on the morphology and behavior of subducting slabs in the mantle transition zone beneath them. Through our attempt of constructing these simulation programs, we have also developed new numerical techniques toward advanced modeling of mantle dynamics.
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Report
(5 results)
Research Products
(48 results)
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[Presentation] Influence of majorite on hot plumes2014
Author(s)
Hiroki Ichikawa, Masanori Kameyama, Hiroki Senshu, Kenji Kawai, and Shigenori Maruyama
Organizer
American Geophysical Union 2014 Fall Meeting
Place of Presentation
サンフランシスコ (アメリカ合衆国)
Year and Date
2014-12-17
Related Report
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