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

Fryer 00- 02584 Wheat 00- 02672建议的项目是对马里亚纳前弧上的四个蛇形泥海山火山进行综合取样和调查研究，目的是限制俯冲滑脱带和上覆地幔楔的压力/温度条件的性质。 该研究还将研究从滑脱和板片到15-29公里板片深度上覆地幔的质量转移过程，包括变质过程中发生的脱水和其他流体-岩石反应。 调查将集中在分析海山蛇纹岩泥中浮泥上升流携带的变质流体和高压低温变质岩样品。 流体、泥浆和岩石样本将由远程操作的车辆（Jasper）Jason收集，以提供对样本地点的地质控制。 样本采集将在DSL-120深拖侧扫声纳绘制泥火山图所确定的框架内进行。 这些研究将限制控制弧前地震活动的关键参数。

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.***