Collaborative Research: Studies of Deep-Sourced Mud Volcanism in the Mariana Forearc: A DSL 120, Jason ROV, and Coring Program

推荐的项目是对马里亚纳前弧上的四座蛇形泥状海山火山进行综合采样和调查研究，旨在对俯冲滑脱带和上覆地幔楔的压力/温度条件的性质进行限制。该研究还将研究在15-29公里的板块深度从滑脱层和板块到上覆地幔的质量传递过程，包括变质过程中发生的脱水和其他流体-岩石反应。调查将围绕海山蛇纹岩泥浆中携带的变质流体和浮力泥浆上涌带来的高压、低温变质岩石样品进行分析。流体、泥浆和岩石样本将由远程操作车辆（ROV） Jason收集，提供样本位置的地质控制。样本收集将在DSL-120深拖曳侧面扫描声纳绘制泥火山地图所定义的框架内进行。这些研究将约束控制弧前地震活动性的关键参数

Fryer 00-02584Wheat 00-02672Recommended project is for an integrated sampling and survey study of four serpentine mud seamount volcanoes on the Mariana forearc, designed to place constraints on the nature of the pressure/temperature conditions in the subduction decollement zone and in the overlying mantle wedge. The research will also study mass transfer processes from the decollement and slab to the overlying mantle at slab depths of 15-29 km, including dehydration and other fluid-rock reactions that occur during metamorphic processes. The investigation will center around analysis of entrained metamorphic fluids and high-pressure, low-temperature metamorphic rock samples brought up by buoyant mud upflow in the seamount serpentinite mud. Fluid, mud, and rock samples will be collected by the remotely-operated vehicle (ROV) Jason, providing geological control of sample localities. Sample collection will be set within a framework defined by mapping of the mud volcanoes by the DSL-120 deep-tow, side-scan sonar. These studies will constrain key parameters controlling forearc seismicity.***