2017 Fiscal Year Final Research Report
Composition and dynamics of Mercury and Mars cores approached from physical properties under high pressures
| Project/Area Number |
26247089
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Economic geology
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
肥後 祐司 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)
浦川 啓 岡山大学, 自然科学研究科, 教授 (30201958)
鎌田 誠司 東北大学, 理学(系)研究科(研究院), 助教 (30611793)
坂巻 竜也 東北大学, 理学研究科, 助教 (30630769)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIDA Keisuke 東京大学, 大学院理学研究科, 助教 (40530887)
KONDO Tadashi 大阪大学, 大学院理学研究科, 教授 (20252223)
SUZUKI Akio 東北大学, 大学院理学研究科, 准教授 (20281975)
SASAKI Sho 大阪大学, 大学院理学研究科, 教授 (10183823)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 中心核 / 地球型惑星 / 音速 / 密度 / 鉄合金 / 液体 / 高圧 / 弾性特性 |
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| Outline of Final Research Achievements |
To clarify the core compositions of Mercury and Mars, elastic properties of liquid and solid Fe-alloys were investigated up to the planetary core conditions. We developed simultaneous sound velocity and density measurement system under high pressure and obtained relationship between sound velocity and density. It is found that the effect of alloying elements (C, S, Si, Ni) on the elastic properties of iron shows significantly different trend depending on alloying elements. Based on these results, we estimated the composition and conditions of the planetary cores.
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| Free Research Field |
高圧地球惑星科学
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