地幔和大洋玄武岩的钒同位素研究

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英文篇名：Vanadium Isotope Compositions of the Mantle and Oceanic Basalts 作者：戚玉菡 ; 吴非 ; 李春辉 ; 黄方 英文作者：QI Yu-han;WU Fei;LI Chun-hui;HUANG Fang;CAS key Laboratory of Crust-Mantle Materials and Environments,Schools of Earth and Space Sciences,University of Science and Technology of China;Department of Earth and Planetary Sciences,Macquarie University; 关键词：Ⅴ同位素 ; 地幔橄榄岩 ; 科马提岩 ; 大洋玄武岩 英文关键词：Ⅴ isotope;;peridotite;;komatiite;;oceanic basalt 中文刊名：矿物岩石地球化学通报 英文刊名：Bulletin of Mineralogy,Petrology and Geochemistry 机构：中国科学院壳幔物质与环境重点实验室中国科学技术大学地球和空间科学学院;麦考瑞大学地球和行星科学学院; 出版日期：2019-03-29 11:04 出版单位：矿物岩石地球化学通报 年：2019 期：03 基金：国家自然科学基金重点项目(41630206) 语种：中文; 页：208-215 页数：8 CN：52-1102/P ISSN：1007-2802 分类号：P588.145;P597

摘要

钒(Ⅴ)是一个变价元素,其赋存状态和地球化学性质对环境的氧化还原条件非常敏感,因此Ⅴ同位素可以作为一个新的地球化学示踪剂来制约高温地质过程氧化还原条件的变化。随着多接收电感耦合等离子质谱仪(MC-ICP-MS)的发展,Ⅴ同位素的分析精度不断提高,高温地质过程的Ⅴ同位素分馏能够被分辨出来,使得Ⅴ同位素的高温地球化学研究得以开展。本文对地幔和大洋玄武岩的Ⅴ同位素组成进行了总结,综述了Ⅴ同位素在蚀变过程、部分熔融和分离结晶重要地质过程的分馏行为,对比了硅酸盐全地球与陨石之间Ⅴ同位素组成的差异,并探讨了高温Ⅴ同位素地球化学未来的发展方向。
        Vanadium is a redox sensitive element with multiple valances. Vanadium isotopes are thus potential to be used to study the oxidation variations of many geology processes at high temperature. Due to the development of MC-ICP-MS,highly precise Ⅴ isotope analysis can be obtained,which makes us possible to distinguish Ⅴ isotope fractionation during high-temperature processes. This study summarized the Ⅴ isotope compositions of the mantle rocks and oceanic basalts,and Ⅴ isotope fractionation during alteration,partial melting and fractional crystallization. Furthermore,this study compared V isotope compositions between the bulk silicate Earth and chondrites,and provided several possible directions for studies of Ⅴ isotope geochemistry at high temperature in the future.

引文

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