| Project/Area Number |
21840037
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Ehime University |
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Principal Investigator |
KUWAYAMA Yasuhiro Ehime University, 地球深部ダイナミクス研究センター, 助教 (00554015)
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| Project Period (FY) |
2009 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥1,196,000 (Direct Cost: ¥920,000、Indirect Cost: ¥276,000)
Fiscal Year 2009: ¥1,404,000 (Direct Cost: ¥1,080,000、Indirect Cost: ¥324,000)
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| Keywords | 超高圧 / 地球中心核 / 相平衡 / 鉄合金 / ダイヤモンドアンビルセル |
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| Research Abstract |
I have largely improved the data quality of in-situ x-ray diffraction measurements at multimegabar pressures and high temperatures. As a result, I succeeded in determining the crystal structures of pure iron and iron-nickel alloy at the pressure and temperature condition of the Earth's inner-core based on reliable data. I determined a solubility of silicon, which is thought to be the most likely candidate of the light element in the Earth's core, into solid iron at high pressures and temperatures and showed that silicon may be contained not only in the Earth's liquid outer-core, but also in the solid inner-core. I also discovered a new ultra-high pressure phase transitions in metal dioxides at multimegabar pressures during this technical development.
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