引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1168次   下载 784 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Simulation of the Melting Behavior of MgSiO3 Perovskite Under Lower Mantle Conditions
Zi-jiang Liu,Xiao-wei Sun,Xiang-dong Yang*,Xin-lu Cheng,Yun-dong Guo
Author NameAffiliationE-mail
Zi-jiang Liu Institute of Electronic Information Science and Technology, Lanzhou City University, Lanzhou 730070 China;Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China  
Xiao-wei Sun School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou 730070, China  
Xiang-dong Yang* Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China xdyang@scu.edu.cn 
Xin-lu Cheng Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China  
Yun-dong Guo Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China  
Abstract:
The melting curve of MgSiO3 perovskite was simulated using molecular dynamics method combining with the effective pair potentials under the lower mantle conditions. It was shown that the state equation simulated for MgSiO3 perovskite is very successful in reproducing accurately the experimental data over a wide range of pressure. The pressure dependence of the simulated melting temperature of MgSiO3 perovskite is in agreement with the recent experimental data. The melting curve simulated for MgSiO3 is very steep at pressures below 60 GPa first, then it becomes smooth with increasing pressure. At the core mantle boundary pressure 135 GPa, MgSiO3 perovskite melts at 6500 K, which is significantly lower than that of the extrapolations of the experimental data from Zerr and Boehler.
Key words:  Melting curve, Molecular dynamics, High pressure, MgSiO3
FundProject:
下地幔条件下钙钛矿结构MgSiO3熔化行为的研究
刘子江,孙小伟,杨向东*,程新路,吴海英
摘要:
利用分子动力学方法结合有效的对势,模拟了下地幔条件下钙钛矿结构MgSiO3的熔化曲线.研究表明,分子动力学模拟结果精确地再现了广泛压强范围内钙钛矿结构MgSiO3的状态方程,并且熔化曲线与最新的实验结果也符合的很好.在压强上升到下地幔压强范围内,压强低于60 GPa时的钙钛矿结构MgSiO3熔化曲线比较陡,接着变得平缓.在核幔边界压强135 GPa时,钙钛矿结构MgSiO3的熔化温度是6500 K,明显低于Zerr和Boehler实验结果的外推结果.
关键词:  熔化曲线, 分子动力学, 高压, MgSiO3
DOI:10.1360/cjcp2006.19(4).311.4
分类号: