Collaborative Research: H2O in the Mantle Wedge

大量的水被俯冲带进上地幔。一般认为，水以近乎连续的方式释放到至少150-200公里的深度。然而，水是如何从板块输送到火山前缘的还不清楚。地幔楔中的水强烈地影响流变学和地震学性质，并对俯冲带的热结构产生重大影响。研究人员建议在一个合作和多学科的项目中研究水对地幔楔动力学的影响。最近的流变学工作使人们有可能，第一次，量化的水对橄榄石蠕变性能的影响。 研究人员将系统地研究水的流变影响，特别关注观察推断的水分布如何影响俯冲力的平衡和角流的产生。这些模型提供了对俯冲带温度和成分的预测，从而可以利用地震学和矿物物理学的观测和实验限制进行关键测试。

EAR-0208089Jeffrey J. ParkLarge amounts of water are carried into the upper mantle by subduction. It is generally assumed that water is released in near continuous fashion to depths of at least 150-200 km. However, it is unknown how water is transported from the slab to the volcanic front. Water in the mantle wedge strongly influences rheological and seismological properties and has a major impact on subduction zone thermal structure. The investigators propose to study the influence of water on mantle wedge dynamics in a collaborative and multi-disciplinary project. Recent rheological work has made it possible, for the first time, to quantify the influence of water on creep properties of olivine. The investigators will systematically study the rheological influence of water, with particular interest in how the observationally inferred water distribution influences the balance of subduction forces and the generation of the cornerflow. The models provide predictions on subduction zone temperature and composition that allow for critical tests using observational and experimental constraints from seismology and mineral physics.