Collaborative Research: Volatiles (H2) and CO2) in Mariana and Izu Arc Magmas

建议的项目是研究Izu-Bonin-Mariana（IBM）电弧系统中的挥发通量。 水和CO2的分析将使用傅里叶变换红外光谱法（FTIR）的玻璃包裹体从橄榄石，激光烧蚀，电感耦合等离子体质谱法（LA-ICPMS）对这些相同的包裹体微量元素分析，并将进行实验相平衡研究IBM玄武岩在压力范围从100-800兆帕在水饱和和不饱和的条件。这项工作是非常重要的了解电弧系统中的质量平衡，解决关键的未知数在波动通量预算。 待用样品已充分表征。 该研究将解决这些样品的减压与通量熔化的相对作用，确定含水条件下的关键相平衡关系，并开发熔体地质湿度计来估计IBM熔岩成分中的水含量。

Recommended project is for a study of the volatile flux in the Izu-Bonin-Mariana (IBM) arc system. Water and CO2 analyses will be done using the Fourier Transform Infrared Spectrometry (FTIR) method on glassy inclusions from olivines, laser-ablation, inductively-coupled plasma mass spectrometry (LA-ICPMS) trace element analysis on these same inclusions, and also will do experimental phase equilibrium studies with IBM basalts at pressures ranging from 100-800 megapascals in water saturated and undersaturated conditions. This work is very important for understanding mass balances in arc systems, addressing key unknowns in volatile flux budgets. The samples to be used are already well characterized. The research will address the relative role of decompression versus flux melting for these samples, determine key phase equilibria relationships under hydrous conditions, and develop melt geohygrometers to estimate water contents in IBM lava compositions.