Accessory Minerals and Crustal Evolution

该提案要求支持继续执行一项多- 关于附属矿物在采矿业中的作用的多方面项目 地球化学 在过去的五年半里， 主要集中在这些岩浆的行为 大陆地壳中的矿物 一个主要目标是 通过战略性的高温高压， 实验，辅助阶段的预测模型 地壳熔体中的溶解度 现在的焦点将大大转移 远离副矿物的岩浆行为， 在亚固相线或变质条件下的行为，并将 包括上地幔和地壳。 总目标 是提供（并在以后应用）对 微量元素地球化学副矿物，年代学 以及岩石圈的产热。

The proposal requested support for the continuation of a multi- faceted project addressing the role of accessory minerals in the geochemistry of the earth. Over the past 5-1/2 years, efforts have focused principally on the magmatic behavior of these minerals in the continental crust. A principal goal has been to develop, through strategic high pressure-temperature experimentation, predictive models of accessory phase solubilities in crustal melts. The focus now will shift largely away from magmatic behavior of accessory minerals to their behavior under subsolidus or metamorphic conditions, and will include the upper mantle as well as the crust. The overall goal is to provide (and later apply) constraints on the role of accessory minerals in trace element geochemistry, geochronology and heat production in the lithosphere.