| Project/Area Number |
25800254
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
NAKAGAWA Takashi 独立行政法人海洋研究開発機構, 数理科学・先端技術研究分野, 主任研究員 (50396941)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | マントルダイナミクス / コアダイナミクス / 熱化学進化 / 安定成層 / コアーマントル熱進化 / 地球熱化学進化 / コア－マントル熱流量 / 不均質構造 / 初期地球仮説 |
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| Outline of Final Research Achievements |
We attempt to reveal both long-term and short-term dynamics of Earth's deep interior, which are based on mantle convection simulation as the long-term and geodynamo simulations as the short-term. On the long-term evolution, the primordial material generated from early Earth differentiation would be important for reconciling core-mantle evolution such as the size of inner core and magnetic field generation over the geologic time-scale. With suggestions from long-term evolution that the stably stratified region at the top of outer core,we hereby focus on the origin of such a region at the top of outermost core with O(100) to 1000 km thickness. As a result, the origin of such a region might be a compositional interaction between metallic iron of core material and silicate material of mantle rock at the core-mantle boundary, which was strongly suggested from numerical geodynamo simulations.
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