高校地质学报2026，Vol.32Issue(2)：192-206,15.DOI:10.16108/j.issn1006-7493.2025036
岩浆岩的V同位素分馏:矿物结晶和氧逸度控制
Vanadium Isotope Fractionation in Igneous Rocks:Controls of Mineral Crystallization and Oxygen Fugacity
摘要
Abstract
Vanadium(V)is a redox-sensitive element,and its valence is controlled by the environmental redox conditions.In recent years,the advancement in MC-ICP-MS analytical techniques has enabled the precise identification of subtle V isotope fractionation in igneous systems.As a result,V isotopes have shown great potential in the study of high-temperature geological processes.Understanding the mechanism of V isotope fractionation during igneous evolution is fundamental to their application in high-temperature geochemical research.This paper reviews the research findings on V isotopes in igneous rocks and points out that mineral crystallization and oxygen fugacity are the main factors controlling V isotope fractionation.Studies have shown that the separation crystallization of silicate minerals can alter V isotope composition of the melt.Moreover,Fe-Ti oxides are key factors controlling V isotope fractionation,and their separation crystallization can lead to an increase in the δ51V value of the residual melt.Additionally,while previous studies suggested that the V isotopes of primitive basalts are not sensitive to changes in oxygen fugacity,recent views indicate that there is recognizable V isotope fractionation at lower degrees of partial melting and higher oxygen fugacity.Based on this,this paper summarizes the applications of V isotopes as follows:in tracing crustal evolution,V isotopes have allowed to establish a close link between felsic continental crust and plate tectonics;in constraining the formation of layered intrusions,V isotopes reveal an evolutionary path from primitive magmas to highly differentiated products;and in tracing mantle-derived magma sources,V isotopes suggest that partial melting and fractional crystallization jointly dominate the transformation of carbonate melts into alkaline basalts.These studies fully demonstrate the great potential of V isotopes in the study of high-temperature geological processes.关键词
岩浆岩/V同位素/储库/分馏机理Key words
igneous rocks/Vanadium isotopes/reservoir/fractionation mechanism分类
天文与地球科学引用本文复制引用
严瑾仪,丁昕,刘呈一泓,陈振武,黄方..岩浆岩的V同位素分馏:矿物结晶和氧逸度控制[J].高校地质学报,2026,32(2):192-206,15.基金项目
国家自然科学基金项目(42330101)资助 （42330101）
