Quantitative Modeling of Gas Migration in Layered Intrusions

本文的主要目的是改进压实和硅酸盐液气入渗的定量建模，并将该模型应用于层状侵入体。更具体地说，本研究将采用改进的、更复杂的气体形态模型来研究层状侵入体中流体运移和含硫化物铂族元素（PGE）矿床形成的影响。这项工作的第二个方面将是扩展定量建模，包括辉石中的Cr成分和应用，以了解这些侵入物中铬铁矿层的形成。后一项工作将包括对来自南非Bushveld复合体的铬铁矿进行实地、岩石学和地球化学研究，以获得建模工作的“地面真相”结果和预测。这项工作的更广泛的影响将是支持研究生的教育和培训，可能还有感兴趣的本科生做独立的研究项目。本研究的计算机程序将提供给任何有兴趣的人用于教学和研究。这也将对层状侵入体中的岩石成因和经济矿床（PGE和Cr）的勘探产生影响。

BoudreauEAR-0407928The main objective of this proposal is to improve the quantitative modeling of compaction and silicate liquid and gas infiltration and application of this modeling to layered intrusions. More specifically, this research will employ improved and more complex gas speciation models to study the effect of fluid migration and the formation of sulfide-hosted platinum-group element (PGE) deposits in layered intrusions. A second aspect of this work will be to expand quantitative modeling to include Cr components in pyroxene and applications to understanding the formation of chromitite layers in these intrusions. This latter work will include field, petrographic and geochemical study of chromites from the Bushveld Complex in South Africa to "ground truth" results and predictions from the modeling work.The broader impacts of this work will be in the support of education and training of a graduate student and possibly of interested undergraduates doing independent research projects. Computer programs that result from this study will be made available for any interested party to use in both teaching and research. It will have implications also for the petrogenesis and exploration of economic mineral deposits (PGE and Cr) in layered intrusions.