Collaborative Research: Petrologic and Geochemical Studies of a Layered Mantle Peridotite, Horoman, Japan: Implicationsfor Melt Segregation and Migration in Arc-Related Upper...

这项计划是一个为期六年的项目的第三年和第四年，将确定霍尔曼橄榄岩邻接层中矿物和全岩的微量元素和同位素体系(锶、钕、铅)。这些数据正在与新的和以前的全岩和矿物主要元素分析相结合。对这次美日合作产生的全面数据的解释将使PI能够了解在霍罗曼橄榄岩中造成成分变化和分层的过程。因此，他们预计将显著提高对熔体形成、迁移和上地幔分离的理解。此外，该橄榄岩处于弧形构造环境，它可能是大洋软流圈如何被俯冲过程改变的一个例子。因此，这项研究的结果可能有助于理解板块会聚所导致的弧火山作用。

This proposal for the third and fourth year of an intended six-year project, will determine the trace element and isotopic systematics (Sr, Nd, Pb) of minerals and whole-rocks from contiguous layers in the Horman Peridotite. These data are being integrated with new and previous whole-rock and mineral major element analyses. Interpretations of the comprehensive data generated in this collaborative U.S.-Japan effort will enable the PIs to understand the processes that created compositional variations and layering within the Horoman Peridotite. As a result, they expect to significantly improve the understanding of melt formation, migration and segregation in the upper mantle. In addition, this peridotite is in an arc tectonic setting, and it may be an example of how oceanic asthenosphere is modified by subduction processes. Therefore, the results of this research may contribute to an understanding of the arc volcanism that results from plate convergence.