Melting Experiments on Fe‐O‐H and Fe‐H: Evidence for Eutectic Melting in Fe‐FeH and Implications for Hydrogen in the Core
Melting Experiments on Fe‐O‐H and Fe‐H: Evidence for Eutectic Melting in Fe‐FeH and Implications for Hydrogen in the Core
复制标题
Fe-O-H 和 Fe-H 的熔化实验:Fe-FeH 中共晶熔化的证据以及对堆芯中氢的影响
DOI:
10.1029/2022gl099420
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发表时间:
2022
影响因子:
5.2
通讯作者:
Ohishi Yasuo
中科院分区:
文献类型:
--
作者:
Oka Kenta;Ikuta Nagi;Tagawa Shoh;Hirose Kei;Ohishi Yasuo
We examined liquidus phase relations in Fe‐O ± H at ∼40 and ∼150 GPa, and in Fe‐H at 45 GPa. While it has been speculated that Fe and FeH form continuous solid solution to core pressures, our experiment on Fe‐H showed that FeH0.20forms with the hcp structure, different from fcc for stoichiometric FeH, and melts at temperature lower than that for FeH, suggesting eutectic melting between Fe and FeH. It is consistent with the liquidus phase diagram in Fe‐O‐H, which implies the Fe‐FeH binary eutectic liquid composition of FeH0.42at ∼40 GPa. These experiments also demonstrated the partition coefficient of H between solid Fe and liquid,DH(solid/liquid) = 0.77–0.89. We estimated the outer core liquid composition based on the liquidus phase relations, solid‐liquid partitioning, and outer/inner core densities and velocities, indicating that O and either H or Si are important core light elements.
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影响因子:
5.3
作者:
Andrault, Denis;Bolfan-Casanova, Nathalie;Mezouar, Mohamed
通讯作者:
Mezouar, Mohamed
DOI:
--
发表时间:
2018
期刊:
Research and Development Highlights, MLF annual report
影响因子:
--
作者:
R. Iizuka-Oku;T. Yagi;H. Gotou;T. Okuchi;T. Hattori;and A. Sano-Furukawa
通讯作者:
and A. Sano-Furukawa
影响因子:
2.3
作者:
Haruka Ozawa;K. Hirose;Shigehiko Tateno;N. Sata;Y. Ohishi
通讯作者:
Haruka Ozawa;K. Hirose;Shigehiko Tateno;N. Sata;Y. Ohishi
DOI:
10.1029/2022jb024365
发表时间:
2022
期刊:
Journal of Geophysical Research: Solid Earth
影响因子:
--
作者:
Tagawa Shoh;Helffrich George;Hirose Kei;Ohishi Yasuo
通讯作者:
Ohishi Yasuo
DOI:
10.1073/pnas.1919930117
发表时间:
2020-04-21
影响因子:
11.1
作者:
Fischer, Rebecca A.;Cottrell, Elizabeth;Le Voyer, Marion
通讯作者:
Le Voyer, Marion