MARGINS Postdoctoral Fellowship: The Role of Sediment Diagenesis and Dewatering on Fluid and Heat Flow, Costa Rica Margin

该奖项将支持MARGINS博士后奖学金，以研究俯冲沉积物如何影响俯冲带内的流体压力，流体流动模式和摩擦特性。 该项目将解决关于沉积物在俯冲带中的作用的两个基本问题：1）哥斯达黎加边缘的蛋白石和蒙皂石脱水作用如何分配成岩流体来源（因此，在俯冲带中产生的大部分流体有多深），以及2）热流和沉积物成分的沿走向变化如何影响成岩流体源，流体压力，流体流动，并可能在俯冲带内的地震活动的上倾极限？

This award will support a MARGINS post-doctoral fellowship to examine how ubducted sediments affect fluid pressure, fluid flow patterns and frictional properties within subduction zones. This project will address two fundamental questions about the role of sediments in subduction zones: 1) how are diagenetic fluid sources partitioned between opal and smectite dewatering on the Costa Rica margin (and therefore how deep in the subduction zone is most of the fluid produced), and 2) how do along-strike variations in heat flow and sediment composition affect the patterns of diagenetic fluid sources, fluid pressures, fluid flow, and possibly the updip limit of seismicity within the subduction zone?