| Budget Amount *help |
¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Thermodynamic model of grain boundary developed for binary eutectic system predicts shows that the pre-melting occurrence can be expected in the Earth’s upper mantle. Based on the realistic volatile distribution and solidus profile obtained from a model of fractional decompression melting, we have shown that even when the oceanic upper mantle is melt free, geotherm sufficiently approaches the solidus at various plate ages, causing the lithosphere-asthenosphere system. We further clarified the quantitative effects of melt on anelasticity and developed a new anelasticity model which can be applied to a region with relatively large melt fraction (several percent). We also measured the impurity effects on anelasticity, and examined the similarities and differences between impurity effects and pre-melting effects.
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