2012 Fiscal Year Final Research Report
Chemical heterogeneity in solid driven by steep temperature gradient under pressure
| Project/Area Number |
23654188
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Osaka University |
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Principal Investigator |
KONDO Tadashi 大阪大学, 大学院・理学研究科, 教授 (20252223)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAIYA Tatsuhiro 大阪大学, 大学院・理学研究科, 助教 (60452421)
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| Project Period (FY) |
2011 – 2012
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| Keywords | ソーレー効果 / 鉄 / かんらん石 / レーザー加熱ダイヤモンドアンビルセル |
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| Research Abstract |
Soret diffusion in olivine was investigated using laser-heated diamond anvil cell at 10-30 GPa with a steep temperature gradient. The samples were quenched to ambient condition after nominal heating duration to conduct chemical analysis of the thin section. Iron diffusion from high temperature region to low temperature one was confirmed when the temperature gradient is 50K/micron. The coefficient of Soret diffusion was roughly estimated to be 5*10-3K-1. A few minutes duration was enough to induce elemental differentiation when sample melts.
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