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

该奖项将支持一个研究俯冲沉积物如何影响俯冲带内流体压力、流体流动模式和摩擦特性的博士后奖学金。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脱石脱水如何划分成岩流体源（因此大部分流体产生于俯冲带的多深处）；2)沿走向的热流和沉积物成分变化如何影响俯冲带内成岩流体源、流体压力、流体流动模式，以及可能的地震活动上倾极限？

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?