Petrologic and Geochemical Studies of a Layered Mantle Peridotite, Horoman, Japan - Implications for Melt Formationand Migration in the Upper Mantle

根据现场观察，结合矿物学和主要元素组成的趋势，M. Obata博士和他的日本同事将分层的霍罗曼橄榄岩解释为上地幔熔体分离的“冻结”例子。在与Obata及其同事的合作努力中，F. Frey （MIT）和N. Shimizu （WHOI）计划确定该橄榄岩中连续层的微量元素和同位素（Sr, Nd, Pb）系统。熔体形成和分离的过程是控制地幔和地壳演化的主要机制，但人们对其了解甚少。这项合作产生的综合数据将有助于确定霍罗曼橄榄岩分层形成的过程，并显著提高对上地幔熔体形成、迁移和分离的理解。这是一个与伍兹霍尔海洋研究所的N. Shimizu博士合作的项目。以及麻省理工学院的弗雷德·弗雷博士。

Based on field observations coupled with trends in mineralogy and major element composition, Dr. M. Obata and Japanese colleagues have interpreted the layered Horoman peridotite as a "frozen" example of melt segregation in the upper mantle. In a collaborative effort with Obata and colleagues, F. Frey (MIT) and N. Shimizu (WHOI) plan to determine the trace element and isotopic (Sr, Nd, Pb) systematics of contiguous layers in this peridotite. The processes of melt formation and segregation are major, but poorly understood, mechanisms that have been in controlling the evolution of the earth's mantle and crust. The comprehensive data generated by this collaborative effort should help to define the proceses that created layering in the Horoman peridotite, and significantly improve the understanding of melt formation, migration and segregation in the upper mantle. This is a joint project with Dr. N. Shimizu of the Woods Hole Oceanographic Institution. and Dr. Fred Frey of the Massachusetts Institute of Technology.