Two-Stage Melting - It's Role in the Geochemical Evolution of the Sources of Ocean-Island and Mid-Ocean Ridge Basalts Collaborative Research

9811054M在这项工作中，我们将建立地球化学演化模块，同时演化提出的地幔对流和分异情景中的微量元素和同位素行为。这些工具将模拟一系列元素和同位素系统的地球化学演化，以便人们可以容易地确定给定的情景是否在广泛的地球化学约束下是自洽的--只有到那时，稀有气体建模人员才能容易地看到他的特定模型与地幔演化的铅、锶、铯同位素约束不一致，反之亦然。我们将把这些模块放在一个基于MatLab的图形环境中，该环境将链接到Germ网站，作为研究和教学辅助工具在地球化学界广泛分发。这些工具还将被我们用来探索一系列特定情景(“两阶段熔融”)的影响，我们认为这些情景显示出相当有希望调和目前对地壳和地幔大规模地球化学演化的地球化学和地球物理制约。

9811054MorganIn this work we will build geochemical evolution modules that simultaneously evolve the trace element and isotopic behavior of proposed scenarios for mantle convection and differentiation. These tools will model the geochemical evolution of a wide spectrum of elements and isotopic systems so that one can readily determine if a given scenario is self-consistent across a broad-spectrum of geochemical constraints-only then could a rare-gas modeller readily see that his particular model is inconsistent with Pb,Sr, or Os isotopic constraints on mantle evolution, or vice versa. We will put these modules within a MATLAB-based graphical environment that will be linked to the GERM web-site for broad distribution within the geochemical community as both a research and teaching aid. These tools will also be used by us to explore the implications of a particular family of scenarios ("two-stage melting") that we feel show considerable promise to reconcile current geochemical and geophysical constraints on the large-scale geochemical evolution of the crust and mantle.