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

该项目为期6年，计划在第三和第四年进行，将确定霍曼橄榄岩连续层中矿物和整块岩石的微量元素和同位素系统（Sr, Nd, Pb）。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。对美日合作项目中产生的综合数据的解释将使pi能够了解在霍罗曼橄榄岩中产生成分变化和分层的过程。因此，他们期望显著提高对上地幔熔体形成、迁移和分离的认识。此外，该橄榄岩处于弧形构造环境中，可能是俯冲作用对海洋软流圈进行改造的一个例子。因此，本研究结果可能有助于认识板块辐合引起的弧火山作用。

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.