Behavior of light elements in iron-silicate-water-sulfur system during early Earth's evolution

Iizuka, Riko*; Goto, Hirotada*; Shito, Chikara*; Fukuyama, Ko*; Mori, Yuichiro*; Hattori, Takanori; Sano, Asami; Funakoshi, Kenichi*; Kagi, Hiroyuki*

Scientific Reports (Internet), 11(1), p.12632_1 - 12632_10, 2021/06

https://doi.org/10.1038/s41598-021-91801-3

The Earth's core consist of Fe-Ni alloy with some light elements (H, C, O, Si, S etc.). Hydrogen (H) is the most abundant element in the universe and one of the promising candidates. In this study, we have investigated the effects of sulfur(S) on hydrogenation of iron-hydrous silicate system containing saturated water in the ideal composition of the primitive Earth. We observed a series of phase transitions of Fe, dehydration of the hydrous mineral, and formation of olivine and enstatite with increasing temperature. The FeS formed as the coexisting phase of Fe under high-pressure and temperature condition, but its unit cell volume did not increase, suggesting that FeS is hardly hydrogenated. Recovered samples exhibited that H and S can be incorporated into solid Fe, which lowers the melting temperature as Fe(H)-FeS system. No detection of other light elements (C, O, Si) in solid Fe suggests that they dissolve into molten iron hydride and/or FeS in the later process of Earth's core-mantle differentiation.

Study of marfe phenomena on JT-60

Nishitani, Takeo; Ishida, Shinichi

JAERI-M 89-209, 30 Pages, 1989/12

JAERI-M-89-209.pdf:0.98MB

no abstracts in English

On the origin of gaseous impurities measured by mass spectroscopy in the JFT-2 tokamak

; ; *; ; ; ; ; ;

Journal of Nuclear Materials, 76-77, p.452 - 458, 1978/00

https://doi.org/10.1016/0022-3115(78)90186-1

no abstracts in English

Ion beam analysis of light elements in metals using the nuclear reaction technique

Ozawa, K.; *

Nihon Genshiryoku Gakkai-Shi, 19(9), p.570 - 579, 1977/09

https://doi.org/10.3327/jaesj.19.570

no abstracts in English