Magmatic hydrothermal alteration systems

这一具体的研究应用侧重于复杂的渗透交代反应体系，它间接涉及到从岩浆挥发演化到金属远端沉淀的光谱；这一建议是他对矽卡岩系统研究的延伸，该研究产生了几个关键影响，其中最显著的是：1)在混合挥发性、渗透性接触交代体系中突出了一些重要的相关系；2)溶质-主岩反应过程中渗透率的演化与理化反应的耦合分析；3)一些衍生火成岩及其气体和喷发方式的挑衅成因解释具有广泛的意义。这些贡献都是相互关联的，因为复杂的反馈机制（即脱碳锋面的CO2回渗）影响流体-矿物-熔融相关系（即降低P(H2O)），影响气体形态，蒸汽饱和度和临界行为，金属分配，即Au， W， Mo等，直至火山喷发过程，包括岩浆挥发行为，火山喷发动力学，就位率等，所有这些都是解释这些系统各个部分的关键。各种渗透矽卡岩的质量平衡分析补充了这项研究，详细说明了加入和（或）从交代系统中除去的物质的比例，然后限制了与矽卡岩形成相关的流体-岩石反应的程度，观察到的元素流动性（流体-岩石比率），产生的蚀变分区，以及负责这些内接触和外接触反应区的机制；由于这些复杂的过程，典型的渗透矽卡岩形成了一些最丰富的矿床。挥发性熔炼和合成过程需要更好地理解高t矽卡岩形成过程，包括H2O-CO2渗透脱碳平衡、碳酸盐熔炼关系，以及控制碳酸化硅酸盐岩浆差异脱气的反应及其动态爆炸侵位过程，包括火山碎屑火山作用。

This specific research application focuses on complex infiltrative metasomatic reaction systems, which indirectly relates to the spectrum from magmatic volatile evolution through to the distal precipitation of metals; this proposal is an extension of his research on skarn systems that has had several key impacts, which most notably are: 1) some important phase relations have been highlighted in mixed volatile, infiltrative contact metasomatic systems, 2) permeability evolution during solution-hostrock reaction coupled with and analysis of physiochemical reactions, and 3) the provocative petrogenetic interpretation of some derivative igneous rocks, their gases, and eruptive style has a wide range of implications. These contributions are all interrelated as the complex feedback mechanisms (i.e., CO2 back infiltration from decarbonation fronts) affect fluid-mineral-melt phase relations (i.e., lowering P(H2O)) that affect gas speciation, vapour saturation and critical behaviour, metal partitioning, i.e., Au, W, Mo, etc. through to eruptive processes, including magma-volatile behaviour, eruptive dynamics, emplacement rates, etc. all of which are critical to interpreting various parts of these systems. The mass-balance analysis of various infiltrative skarns compliments this research, by detailing the proportion of material added to and (or) removed from the metasomatic system, which then constrains the degree of fluid-rock reaction associated with skarn formation, the elemental mobility (fluid-rock ratios) observed, alteration zoning produced, and the mechanisms responsible for these endo- and exo-contact reaction zones; typically infiltrative skarns form some of the richest mineral deposits due to these complex processes. The volatile fluxing and syntectic processes require a better understanding of high-T, skarn-forming processes, including H2O-CO2  infiltrative decarbonation equilibria, carbonate fluxing relations, as well as the reactions that govern differential degassing of carbonated silicate magmas and their dynamic explosive emplacement processes, including pyroclastic volcanism.