Vanadium Redox Proxy Applied to Modern Mantle-Derived Magmas

We compile previously published bulk compositions for basaltic rocks. We include mid-ocean ridge segment and back arc basin segment averages and arc-front volcano averages when segments/volcanoes have 3 or more individual basalt samples with 5 < MgO < 12 and Dy/Yb <= 1.8. The data are used to calculate a 'vanadium proxy' used to constrain relative oxygen fugacity of the mantle source region of these magmas.

本研究汇编了已发表的玄武岩全岩成分（bulk compositions）数据。当岩段或火山拥有至少3件单个玄武岩样品，且样品的MgO含量介于5至12之间、Dy/Yb比值不超过1.8时，本研究将纳入对应洋中脊（mid-ocean ridge）段、弧后盆地（back arc basin）段的平均数据，以及弧前火山（arc-front volcano）的平均数据。本数据集可用于计算“钒替代指标（vanadium proxy）”，以约束此类岩浆的地幔源区相对氧逸度（oxygen fugacity）。