| Project/Area Number |
24540520
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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 |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | University of Hyogo |
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Principal Investigator |
MATSUI Masanori 兵庫県立大学, 生命理学研究科, 名誉教授 (90125097)
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| Co-Investigator(Kenkyū-buntansha) |
HIGO Yuji 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 研究員 (10423435)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 放射光実験 / スピン転移 / 超音波測定 / フェロペリクレイス / 超高圧高温 / 下部マントル / 地球内部 |
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| Outline of Final Research Achievements |
The elastic wave velocities of (Mg0.8,Fe0.2)O and (Mg0.5,Fe0.5)O ferropericlases have been measured up to 50 GPa, by combining ultrasonic interferometry, in situ synchrotron X-ray diffraction, and X-ray radiographic techniques in a Kawai-type, multi-anvil, high-pressure apparatus and sintered diamond anvils. The sample was heated in a cylindrical TiB2 (+BN) tube, and experimental data were recorded after heating the sample to 1073 K under a fixed press load to minimize non-hydrostatic components due to local deviatoric stresses. The travel times were measured based on the reflections from the sintered diamond cube, the polycrystalline Al2O3 buffer rod, and the sample. An abrupt change in ultrasonic echo from the sample was observed at pressures higher than about 40 GPa in (Mg0.5,Fe0.5)O ferropericlase, suggesting a result of high-spin to low-spin phase transition in the Fe ions.
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