中国东部碱性玄武岩样品的钒同位素组成

本数据集包含中国东部高氧逸度（fO₂）碱性玄武岩的高精度钒同位素数据。这些玄武岩由碳酸盐地幔低程度部分熔融形成。数据通过高精度分析技术获得，质量可靠。结果显示其δ⁵¹V值高于全硅酸盐地球（BSE）和中洋隆起玄武岩（MORBs），且化学蚀变、地壳混染或分异结晶对其影响很小。尽管俯冲碳酸盐参与地幔源区形成，但质量平衡计算表明碳酸盐加入未显著提高其δ⁵¹V值。数据表明，地幔熔融过程中的氧化还原条件和部分熔融程度控制了钒同位素分馏。该数据集可为研究地幔熔融过程、岩浆系统氧化还原状态提供重要参考，具有广阔的应用前景。

This dataset contains high-precision vanadium isotope data of alkaline basalts with high oxygen fugacity (fO₂) from eastern China. These basalts were formed via low-degree partial melting of a carbonated mantle source. The data were acquired using high-precision analytical techniques, with reliable quality. The results show that their δ⁵¹V values are higher than those of the Bulk Silicate Earth (BSE) and Mid-Ocean Ridge Basalts (MORBs), with minimal effects from chemical alteration, crustal contamination, or fractional crystallization. Although subducted carbonates participate in the formation of the mantle source, mass balance calculations indicate that the addition of carbonates does not significantly elevate their δ⁵¹V values. The data demonstrate that redox conditions during mantle melting and the degree of partial melting control vanadium isotope fractionation. This dataset provides an important reference for studies on mantle melting processes and the redox state of magmatic systems, and has broad application prospects.

搜集汇总

背景与挑战

背景概述

本数据集提供中国东部碱性玄武岩的高精度钒同位素组成数据，涵盖约6600万年至今的时间范围，空间分辨率为0.5°至1°。数据表明其δ⁵¹V值高于全硅酸盐地球和中洋隆起玄武岩，受外部影响小，并揭示了地幔熔融过程中的氧化还原条件和部分熔融程度对钒同位素分馏的控制作用，适用于研究地幔熔融过程和岩浆系统氧化还原状态。