高圧力の科学と技術
Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X
特集:地球深部における化学的不均質
高温高圧実験で探る地球深部始源的希ガスリザーバーの在処
角野 浩史貴志 智野村 龍一三部 賢治舘野 繁彦鍵 裕之
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2017 年 27 巻 4 号 p. 266-277

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Noble gas isotopes have been a strong argument for the presence of primordial reservoir in the mantle, which has been isolated from the mantle convection throughout the Earth's history. However, recent understanding of mantle dynamics has revealed difficulty with the isolation within the mantle. Alternatively the core is a promising candidate, validity of which depends on partition coefficient of noble gases between liquid iron-rich metal and silicate melt at condition of core segregation in the magma ocean. A few experiments showed that the core could hold primordial noble gases though there are several uncertainties possibly due to extreme noble gas concentrations. For a better understanding of the primordial noble gas reservoir, we are conducting new experiments to determine noble gas partition coefficients between molten metal and silicate.

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© 2017 日本高圧力学会
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