Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073294 |
Influence of the iron spin crossover in ferropericlase on the lower mantle geotherm | |
Valencia-Cardona, Juan J.1; Shukla, Gaurav2; Wu, Zhongqing3; Houser, Christine4; Yuen, David A.1,5; Wentzcovitch, Renata M.6,7 | |
2017-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China; Japan |
英文摘要 | The iron spin crossover in ferropericlase introduces anomalies in its thermodynamics and thermoelastic properties. Here we investigate how these anomalies can affect the lower mantle geotherm using thermodynamics properties from ab initio calculations. The anomalous effect is examined in mantle aggregates consisting of mixtures of bridgmanite, ferropericlase, and CaSiO3 perovskite, with different Mg/Si ratios varying from harzburgitic to perovskitic (Mg/Si similar to 1.5 to 0.8). We find that the anomalies introduced by the spin crossover increase the isentropic gradient and thus the geotherm proportionally to the amount of ferropericlase. The geotherms can be as much as similar to 200K hotter than the conventional adiabatic geotherm at deep lower mantle conditions. Aggregate elastic moduli and seismic velocities are also sensitive to the spin crossover and the geotherm, which impacts analyses of lower mantle velocities and composition. |
英文关键词 | geotherm spin crossover ferropericlase lower mantle |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131900059 |
WOS关键词 | EARTHS LOWER MANTLE ; CUBIC CASIO3 PEROVSKITE ; PYROLITIC LOWER MANTLE ; X-RAY-DIFFRACTION ; HIGH-PRESSURE ; POST-PEROVSKITE ; PHASE-EQUILIBRIA ; TRANSITION ; BOUNDARY ; CONSTRAINTS |
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/25888 |
专题 | 气候变化 |
作者单位 | 1.Univ Minnesota, Sci Comp Program, Minneapolis, MN USA; 2.Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA; 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China; 4.Tokyo Inst Technol, Earth Life Sci Inst, Tokyo, Japan; 5.Univ Minnesota Twin Cities, Dept Earth Sci, Minneapolis, MN USA; 6.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 7.Columbia Univ, Dept Earth & Environm Sci, Lamont Doherty Earth Observ, Palisades, NY 10964 USA |
推荐引用方式 GB/T 7714 | Valencia-Cardona, Juan J.,Shukla, Gaurav,Wu, Zhongqing,et al. Influence of the iron spin crossover in ferropericlase on the lower mantle geotherm[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10). |
APA | Valencia-Cardona, Juan J.,Shukla, Gaurav,Wu, Zhongqing,Houser, Christine,Yuen, David A.,&Wentzcovitch, Renata M..(2017).Influence of the iron spin crossover in ferropericlase on the lower mantle geotherm.GEOPHYSICAL RESEARCH LETTERS,44(10). |
MLA | Valencia-Cardona, Juan J.,et al."Influence of the iron spin crossover in ferropericlase on the lower mantle geotherm".GEOPHYSICAL RESEARCH LETTERS 44.10(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论