The Pb Isotope Evolution of the Iceland Plume

这是一个继续调查时间铅的项目， 第三纪高原玄武岩和中央玄武岩的同位素变化 冰岛的火山复合体，山脊的原型 中心热点 本研究旨在解释 冰岛地幔柱的地质历史，以及 热点、地幔不均匀性和地幔之间的关系 地球动力学 时间地球化学研究 与羽状火山作用有关的变化可以限制羽状火山作用 动力学和羽流与周围环境之间的相互作用 地幔 铅同位素的变化，迄今已建立的为 第三纪高原玄武岩需要三组分混合， 这三个组成部分的相对贡献不是随机的 而是随着时间有规律地、系统地变化。 拟议 研究将集中在确定岩浆的过程 浅部的形成、迁移和储存影响同位素 在地质学过去的有限时间内的变化。

This is a project to continue investigating the temporal Pb isotope variation in the Tertiary plateau basalts and central volcanic complexes from Iceland, the prototype of a ridge- centered hot spot. This study is aimed towards interpreting the geological history of the Iceland plume, as well as the relationship between hotspots, mantle heterogeneity and mantle geodynamics in general. The study of temporal geochemical variations associated with plume volcanism can constrain plume dynamics and interaction between the plume and the surrounding mantle. The Pb isotope variation so far established for the Tertiary plateau basalts requires 3-component mixing, and the relative contributions of these three components are not random but change regularly and systematically with time. The proposed research will focus on establishing how processes of magma formation, migration and storage at shallow depths affect isotope variations during a limited period of time in the geologic past.