MARGINS: Constraining the Process of Volatile Transfer from the Subducted Slab to the Surface using Phenocrysts of Recently Erupted Tephras from the Izu-Bonin-Marianas Arc

PI将分析Izu-Bonin-Mariana系统熔岩中橄榄石斑晶的氮同位素组成，以扩展他在IBM重点区域弧火山氮同位素方面的工作。他以前的工作主要集中在火山口和泉水，但这限制了对活火山的分析。新的方法将允许更广泛的弧覆盖。结果将被解释在目前的地球化学模型的框架内的弧，通过板状流体或沉积物熔体的元素运输解决问题。该研究将拓宽俯冲带氮同位素体系的应用范围。该提案有很强的外联部分，将支持一名博士生。与日本的国际合作也是一个优势。

The PI will analyze the isotopic compositions of nitrogen for olivine phenocrysts in lavas from the Izu-Bonin-Mariana system to extend his work on nitrogen isotopes from arc volcanoes in the IBM focus area. His previous work has focused on fumaroles and springs, but this limits analyses to active volcanoes. The new approach will allow much broader coverage of the arc. The results will be interpreted in the framework of current geochemical models of the arc, addressing questions about the element transport via slab fluid or sediment melt. The study will broaden the range of applications for the N-isotope system in subduction zones. The proposal has a strong outreach component and will support a PhD student. International collaboration with Japan is also a plus.