Low hydrogen contents in the cores of terrestrial planets.
Low hydrogen contents in the cores of terrestrial planets.
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DOI:
10.1126/sciadv.1701876
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发表时间:
2018-03
期刊:
影响因子:
13.6
通讯作者:
Andrault D
中科院分区:
文献类型:
--
作者:
Clesi V;Bouhifd MA;Bolfan-Casanova N;Manthilake G;Schiavi F;Raepsaet C;Bureau H;Khodja H;Andrault D
During planetary accretion, hydrogen behaves as a lithophile element and is unlikely to be a major element in planetary cores. Hydrogen has been thought to be an important light element in Earth’s core due to possible siderophile behavior during core-mantle segregation. We reproduced planetary differentiation conditions using hydrogen contents of 450 to 1500 parts per million (ppm) in the silicate phase, pressures of 5 to 20 GPa, oxygen fugacity varying within IW-3.7 and IW-0.2 (0.2 to 3.7 log units lower than iron-wüstite buffer), and Fe alloys typical of planetary cores. We report hydrogen metal-silicate partition coefficients of ~2 × 10−1, up to two orders of magnitude lower than reported previously, and indicative of lithophile behavior. Our results imply H contents of ~60 ppm in the Earth and Martian cores. A simple water budget suggests that 90% of the water initially present in planetary building blocks was lost during planetary accretion. The retained water segregated preferentially into planetary mantles.
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影响因子:
16.6
作者:
Iizuka-Oku R;Yagi T;Gotou H;Okuchi T;Hattori T;Sano-Furukawa A
通讯作者:
Sano-Furukawa A
影响因子:
5.3
作者:
Hirschmann, M. M.;Withers, A. C.;Foley, N. T.
通讯作者:
Foley, N. T.
DOI:
10.1007/bf02662750
发表时间:
1971-01-01
期刊:
METALLURGICAL TRANSACTIONS
影响因子:
--
作者:
BECK, W;BOCKRIS, JO;SUBRAMAN.PK
通讯作者:
SUBRAMAN.PK
影响因子:
3.9
作者:
Bouhifd, M. A.;Clesi, V.;Andrault, D.
通讯作者:
Andrault, D.
影响因子:
5
作者:
Dasgupta, Rajdeep;Walker, David
通讯作者:
Walker, David