Determination of Intensive Variables in Medium- to High-Grade Pelitic Rocks

本研究项目的主要目的是精确测定控制观察到的泥质变质岩矿物组合的化学平衡。矿物堇青石、赤铁矿-钛铁矿和红柱石-硅线石在高压和/或高温下的行为将通过相平衡实验、量热测量、理论模型和实地研究来阐明。该研究将为矿物热化学数据提供约束，并将导致更准确的量化变质岩的密集变量。研究结果将最终应用于研究压力-温度-时间路径、流体流动、扩散以及变质与变形之间的关系。

The principal objective of this research project is to obtain precise determinations of the chemical equilibria that govern the observed mineral assemblages in pelitic metamorphic rocks. Behavior of the minerals cordierite, hematite-ilmenite, and andalusite-sillimanite at high pressures and/or temperatures will be elucidated by phase equilibria experiments, calorimetric measurements, theoretical modelling, and field studies. This research should provide constraints for mineral thermochemical data and should lead to more accurate quantification of the intensive variables of metamorphic rocks. The results of the research will ultimately find application in studying pressure-temperature-time paths, fluid flow, diffusion, and relations between metamorphism and deformation.