Partitioning of F and C1 in Hydrothermal Systems

这项建议是为了支持旨在恢复F-和Cl-端元云母、角闪石和其他相的热力学数据的理论研究，以用于破译F和Cl在反应水热体系中的行为。这些研究将能够根据硅酸盐矿物的已知组成对热液流体的形态和总卤化物含量施加限制。此外，还有可能预测在水-岩相互作用过程中氟和氯如何在矿物和水流体之间分配，以及这种分配在富氟矿床的形成中是否重要。这项工作最重要的方面是从已发表的实验研究中恢复氟化物和氯化物端元矿物的热力学性质，并将这些结果应用于地质问题。研究的范围将限于这些方面。

This proposal is for support of theoretical studies aimed at retrieving thermodynamic data for F- and Cl- endmember micas, amphiboles and other phases for use in deciphering the behavior of F and Cl in reacting hydrothermal systems. These studies will enable constraints to be placed on the speciation and total halide contents of hydrothermal fluids based on known compositions of silicate minerals. In addition, it will be possible to predict how F and Cl partitioned between minerals and aqueous fluids during water-rock interactions and whether this partitioning is important in the generation of F-rich ore deposits. The most important aspects of this work are the retrieval of the thermodynamic properties of fluoride and chloride end-member minerals from published experimental studies, and the application of these results to geologic problems. The scope of the research will be limited to these aspects.