2016 Fiscal Year Final Research Report
First principles study on liquid iron alloys in the Earth's core
| Project/Area Number |
26400525
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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 |
Geochemistry/Cosmochemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
|
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| Research Collaborator |
HIROSE Kei
|
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 第一原理計算 / 地球外核 / 液体鉄合金 / 高圧物性 |
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| Outline of Final Research Achievements |
The outer core of the Earth consists of liquid iron alloys with light elements. However, the amounts and kinds of light elements have not been constrained yet. In this study, we performed a series of first principles calculations of density and bulk sound velocity of liquid iron alloys. By comparing them with seismic observations, we tried to constrain the amounts and kinds of light elements as much as possible. We found that hydrogen is a very potential candidate of light element since hydrogen solely can reproduce density and bulk sound velocity by seismic observations. With calculations for other light elements, we proposed combinations of light elements which are consistent with seismic observations.
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| Free Research Field |
地球惑星物理
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