Collaborative Research: Mantle Serpentinization and Water Cycling Through the Mariana Trench and Forearc

该项目将利用主动震源和被动震源技术，分别在马里亚纳前弧、海沟和外隆起使用短周期和宽带海底地震仪，以成像上地幔蛇纹岩化的分布。这项研究将解决一个关于蛇纹岩对了解俯冲带的重要性的中心问题。量化上地幔蛇纹岩俯冲水通量，探讨蛇纹岩化与外前弧和外隆起地震活动性的关系。更广泛的影响：这项研究与弧磁作用密切相关，将有助于量化地幔的水化状态，从而解决边际项目俯冲工厂倡议的主要目标。该项目为一些研究生和本科生提供教育支持。

This project will utilize active- and passive source seismic techniques, using short period and broad band OBSs, respectively, in the Mariana forearc, trench, and outer rise, in order to image the distribution of upper mantle serpentinization. This study will address a central question regarding the importance of serpentinite for understanding subduction zones. The research will quantify the flux of water subducted by upper-mantle serpentinite, and explore the relationships between serpentinization and seismicity in the outer forearc and outer rise. Broader Impacts: This study has much relevance to arc magnatism and will help quantify the hydration state of the earth's mantle, thus addressing a primary goal of the Subduction Factory initiative of the MARGINS program. The project provides educational support for several graduate and undergraduate students.