Vanadium isotope data of bimodal volcanic rocks in the Hailar Basin, Northeast China

This dataset contains vanadium isotope compositions (δ⁵¹V) and related geochemical data for bimodal volcanic rocks (basaltic trachyandesites and trachytes–rhyodacites) from the Hailar Basin, Northeast China. It is used to investigate vanadium isotope fractionation during the evolution of mafic and felsic magmas in intracontinental magmatic systems. The supplementary files include complete outputs from MELTS thermodynamic simulations and Rayleigh fractionation modeling, which support the discussion of vanadium isotope fractionation mechanisms presented in the main text.本数据集收录中国东北海拉尔盆地产出的双峰火山岩（玄武粗安岩、粗面岩-流纹英安岩）的钒同位素组成（δ⁵¹V）及相关地球化学数据，用于探究陆内岩浆系统内镁铁质与长英质岩浆演化过程中的钒同位素分馏过程。补充文件包含MELTS热力学模拟与瑞利分馏模拟的完整输出结果，用于支撑正文中关于钒同位素分馏机制的讨论。