Collaborative Research: Petrogenetic Significance of AFM Mineral-Felsic Liquid Equilibria: Continuation of an Experimental Study (with RPI)

本项目包括实验测定长质体系中矿物-熔体平衡随压力、温度、含水量和微量元素浓度的变化。将特别强调次要元素（铝、铁和镁）的作用，这些元素为长英质岩浆提供了独特的特征，并可能用于区分其进化史的重要方面。将天然含水矿物（黑云母、角闪石、白云母）添加到石英长石组合物中，以测试它们的稳定性范围和分解反应以及共存液体的组成。这些实验的结果将有助于限制长英质液体和岩浆的成分变异性作为源成分和生成条件的函数，将测试基性岩作为初级趋势岩浆源的可行性，并将限制绿帘石和白云母与岩浆液体共存的条件范围。

This project involves the experimental determination of mineral- melt equilibria in felsic systems as functions of pressure, temperature, water content, and minor element concentrations. Particular emphasis will be placed on the role of minor elements (aluminum, iron, and magnesium) which lend distinctive signatures to felsic magmas and which may serve to distinguish important aspects of their evolutionary histories. Natural hydrous minerals (biotite, hornblende, muscovite) will be added to quartz-feldspar compositions to test their stability ranges and breakdown reactions and the compositions of coexisting liquids. The results of these experiments will help to constrain the compositional variability of felsic liquids and magmas as functions of source composition and conditions of generation, will test the viability of mafic rocks as sources of primary trndhjemitic magmas, and will constrain the range of conditions over which epidote and muscovite can coexist with magmatic liquids.