Quantitative Modeling of Gas Migration in Layered Intrusions

这项建议的主要目的是改进压实和硅酸盐液体和气体渗透的定量模型，并将该模型应用于层状侵入体。更具体地说，这项研究将使用改进的和更复杂的气体形态模型来研究流体运移的影响和层状侵入体中硫化物赋存的铂族元素(PGE)矿床的形成。这项工作的第二个方面将是扩展定量模拟，以包括辉石中的铬组分，并应用于了解这些侵入岩中铬铁矿层的形成。后一项工作将包括对南非布什维尔德杂岩中的铬铁矿进行野外、岩石学和地球化学研究，以获得模拟工作的“地面真实”结果和预测。这项工作的更广泛影响将支持研究生的教育和培训，可能还有从事独立研究项目的感兴趣的本科生。这项研究产生的计算机程序将可供任何感兴趣的各方在教学和研究中使用。这也将对层状侵入体中经济矿床(PGe和Cr)的岩石成因和勘探具有重要意义。

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.