| DOI: | 10.1002/2015GL063478
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| 论文题名: | The influence of hydrogen on the seismic properties of solid iron |
| 作者: | Caracas R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9568
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| EISSN: | 1944-9299
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| 出版年: | 2015
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| 卷: | 42, 期:10 | | 起始页码: | 3780
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| 结束页码: | 3785
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| 语种: | 英语
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| 英文关键词: | composition
; Earth's core
; hcp iron
; hydrogen
; light element
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| Scopus关键词: | Calculations
; Chemical analysis
; Chemical elements
; Seismology
; Shear flow
; Shear waves
; Earth's core
; First-principles calculation
; HCP iron
; Hexagonal close packed structure
; Light elements
; Seismic properties
; Shear wave velocity
; Structural effect
; Hydrogen
; hydrogen
; iron
; S-wave
; seismology
; wave velocity
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| 英文摘要: | We estimate the implications of having hydrogen dissolved in the solid core from a mineral physics perspective. Based on first-principles calculations, we observe that hydrogen has a strong effect on decreasing the density of the hexagonal close-packed structure of Fe. The structural effect is weakly dependent on the ordering pattern of the hydrogen defects. However, hydrogen also increases the elastic moduli of Fe at core pressures. Both the compressional and the shear wave velocities increase with addition even of small amounts of hydrogen, the increase of shear going against the geophysical requirements for light elements. This aspect makes hydrogen an undesirable light element in the Earth's core if we try to match the seismological observations. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931578696&doi=10.1002%2f2015GL063478&partnerID=40&md5=a685b59f5f371a5e6f17e4b8fd8ba2c6
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9183
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | CNRS, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, Lyon, France
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| Recommended Citation: | |
Caracas R.. The influence of hydrogen on the seismic properties of solid iron[J]. Geophysical Research Letters,2015-01-01,42(10).
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