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  4. 中国科学院地球与行星物理重点实验室
Theoretical study of lithium diffusion and fractionation in forsterite and its high-pressure phases

文献类型：期刊论文

作者Jiang, Jiajun1,2; Zhang, Feiwu1,3; Yang, Hua1,2; Yu, Tiancheng4
刊名PHYSICS AND CHEMISTRY OF MINERALS
出版日期2019-07-01
卷号46期号:7页码:663-673
关键词Olivine Wadsleyite Ringwoodite Lithium Diffusion Fractionation Simulation
ISSN号0342-1791
DOI10.1007/s00269-019-01029-x
英文摘要As a geochemical tracer in mantle studies, lithium isotopes play an important role in diffusion and fractionation in major mantle minerals. Olivine and its high-pressure phases, wadsleyite and ringwoodite, are considered to predominate in the upper mantle and transition zone on the earth. We carried out simulations of lithium isotopes' diffusion and fractionation in Mg end member olivine and its high-pressure phases to learn the details of the signatures of lithium isotopes preserved in mantle materials. In this work, the diffusion and fractionation mechanisms between different lattice sites of lithium isotopes in forsterite (Mg2SiO4), wadsleyite (-Mg2SiO4) and ringwoodite (-Mg2SiO4) at the atomic level are studied using empirical atomistic simulation techniques. It is found that Li can pass through the high-pressure phases (wadsleyite and ringwoodite) energetically much easier due to the low migration energy barriers via either substitutional or interstitial mechanism. The activation energy is high for Li diffusion along the interstitial path in the forsterite and decreases drastically with the assist of Mg vacancies. The temperature-dependent fractionation for two Li isotopes between two different lattice sites is calculated at the temperatures from 300 to 2500K. This behavior generates the lighter Li storage in the near-surface mantle-derived rocks and provides insights into zoning and composition of lithium isotopes in olivine and its high-pressure phases.
WOS关键词ISOTOPE FRACTIONATION ; COMPUTER-SIMULATION ; HIGH-TEMPERATURE ; LI ; CONSTRAINTS ; ABUNDANCES ; OLIVINE ; RINGWOODITE ; WADSLEYITE ; SUBDUCTION
资助项目Chinese Academy of Sciences (CAS) ; China National Thousand (Young) Talents plan ; National Natural Science Foundation of China[41773057]
WOS研究方向Materials Science ; Mineralogy
语种英语
WOS记录号WOS:000472227400002
出版者SPRINGER
资助机构Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; China National Thousand (Young) Talents plan ; China National Thousand (Young) Talents plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; China National Thousand (Young) Talents plan ; China National Thousand (Young) Talents plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; China National Thousand (Young) Talents plan ; China National Thousand (Young) Talents plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; China National Thousand (Young) Talents plan ; China National Thousand (Young) Talents plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/92513]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Zhang, Feiwu
作者单位1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
4.Suzhou Univ Sci & Technol, Sch Math & Phys, Suzhou 215009, Peoples R China
推荐引用方式
GB/T 7714		 Jiang, Jiajun,Zhang, Feiwu,Yang, Hua,et al. Theoretical study of lithium diffusion and fractionation in forsterite and its high-pressure phases[J]. PHYSICS AND CHEMISTRY OF MINERALS,2019,46(7):663-673.
APA Jiang, Jiajun,Zhang, Feiwu,Yang, Hua,&Yu, Tiancheng.(2019).Theoretical study of lithium diffusion and fractionation in forsterite and its high-pressure phases.PHYSICS AND CHEMISTRY OF MINERALS,46(7),663-673.
MLA Jiang, Jiajun,et al."Theoretical study of lithium diffusion and fractionation in forsterite and its high-pressure phases".PHYSICS AND CHEMISTRY OF MINERALS 46.7(2019):663-673.

入库方式： OAI收割

来源：地质与地球物理研究所

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