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系统，它间接涉及从岩浆挥发分演化到金属远端沉淀的光谱；这一建议是他对夕卡岩系统研究的扩展，该系统有几个关键影响，最显著的是：1)在混合挥发分、渗透接触交代系统中突出了一些重要的相关系，2)溶液-主岩反应过程中的渗透率演化，以及对物理化学反应的分析，以及3)对一些衍生火成岩、它们的气体和喷发方式的挑衅性岩石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(即来自脱碳前沿的CO2反向渗透)影响着流体-矿物-熔体相关系(即降低P(H2O))，从而影响气体的形态、蒸汽饱和度和临界行为、金属分配(即Au、W、Mo等)和喷发过程，包括岩浆挥发行为、喷发动力学、侵位速率等，所有这些都对解释这些系统的不同部分至关重要。对各种浸润性夕卡岩的质量平衡分析补充了这项研究，详细说明了添加到交代系统中和(或)从交代系统中移除的物质的比例，然后限制了与夕卡岩形成相关的流体-岩石反应的程度、观察到的元素活动性(流体-岩石比)、所产生的蚀变分带以及这些内外接触反应带的负责机制；由于这些复杂的过程，典型的浸润性夕卡岩形成了一些最丰富的矿藏。挥发熔融和共熔过程需要更好地了解高温夕卡岩形成过程，包括H2O-CO2和渗透脱碳平衡，碳酸盐熔融关系，以及控制碳酸盐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.