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DOI | 10.1029/2018GL080555 |
Nitrogen Content in the Earth's Outer Core | |
Bajgain, Suraj K.1; Mookherjee, Mainak1; Dasgupta, Rajdeep2; Ghosh, Dipta B.3; Karki, Bijaya B.3 | |
2019-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:1页码:89-98 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Using first principles molecular dynamic simulations, we explore the effects of nitrogen (N) on the density and sound velocity of liquid iron and evaluate its potential as a light element in the Earth's outer core. Our results suggest that Fe-N melt cannot simultaneously explain the density and seismic velocity of the Earth's outer core. Although 2.0wt.%N can explain the bulk sound velocity of the outer core, such N content only lowers the density of liquid Fe by 3%. Matching both the velocity and density by the other light elements limits the N in the core to <<2.0wt.%. Our finding suggests that nitrogen is a minor to trace element in the Earth's core and is consistent with the geochemical mass balance with terrestrial abundance of N and alloy-silicate partitioning data, which suggest that there cannot be significant N in the core. Plain Language Summary Physical properties of liquid iron cannot explain the seismological observations of density and sound wave velocities in the liquid outer core. In this study we explore the effect of light element nitrogen on the physical properties of liquid iron and provide an upper bound of the amount of nitrogen in the outer core if nitrogen were the sole light element. |
英文关键词 | Earth' s outer core light elements density of molten Fe-N alloy compressional velocity of molten Fe-N alloy |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456938600011 |
WOS关键词 | EQUATION-OF-STATE ; HIGH-PRESSURE IMPLICATIONS ; TOTAL-ENERGY CALCULATIONS ; LIQUID-IRON ; SOUND-VELOCITY ; CARBONACEOUS CHONDRITES ; DENSITY-MEASUREMENTS ; MOLECULAR-DYNAMICS ; MELTING RELATIONS ; VOLATILE-RICH |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29058 |
专题 | 气候变化 |
作者单位 | 1.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Earth Mat Lab, Tallahassee, FL 32306 USA; 2.Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX USA; 3.Louisiana State Univ, Dept Geol & Geophys, Sch Elect Engn & Comp Sci, Ctr Computat & Technol, Baton Rouge, LA 70803 USA |
推荐引用方式 GB/T 7714 | Bajgain, Suraj K.,Mookherjee, Mainak,Dasgupta, Rajdeep,et al. Nitrogen Content in the Earth's Outer Core[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(1):89-98. |
APA | Bajgain, Suraj K.,Mookherjee, Mainak,Dasgupta, Rajdeep,Ghosh, Dipta B.,&Karki, Bijaya B..(2019).Nitrogen Content in the Earth's Outer Core.GEOPHYSICAL RESEARCH LETTERS,46(1),89-98. |
MLA | Bajgain, Suraj K.,et al."Nitrogen Content in the Earth's Outer Core".GEOPHYSICAL RESEARCH LETTERS 46.1(2019):89-98. |
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