Mineralized Magmatic Hydrothermal Systems

这个特定的研究应用程序侧重于复杂的渗透交代反应系统，这间接涉及到从岩浆挥发性演化到相关金属络合物的远端沉淀的光谱;这是我对矽卡岩系统研究的延伸，具有几个关键影响，其中最显着的是：1）在混合挥发性、渗透性接触交代体系中，一些重要的相关系已得到强调，2）溶液-寄主岩石反应过程中渗透率的演化与物理化学反应的分析; 3）对某些衍生火成岩及其气体的成因解释具有启发性，喷发/角砾岩化样式具有广泛的意义。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回渗）影响流体-矿物-熔体相关系（即，降低P（H2O）），其影响气体形态、蒸汽饱和度和临界行为，金属分配，即，Fe、Cu、Au、W、Mo等元素通过实际的火山作用。这包括在不同压力下的差异脱气，这可能导致高盐度流体变成盐或碳酸盐熔体（一些富铁盐变成碳酸盐熔体），这可能解释某些与夕卡岩有关的存款系统的一些有问题的成因方面，即，富磁铁矿IOA和IOCG系统。最近的流体反应方面的研究表明，在低到高T高盐度系统中的二氧化硅活性关系显示二氧化硅的活动变化很大，影响比例的钙硅酸盐形成矿化，这是至关重要的许多这些有争议的系统的解释。质量平衡分析的各种渗透夕卡岩恭维这项研究，虽然肯定是具有挑战性的;详细说明比例的材料添加到和（或）从交代系统中删除有助于约束程度的流体-岩石反应与渗透反应交代系统，元素流动性（流体-岩石比）观察到的，和负责这些内，外接触反应区的机制。最具挑衅性的方面重新审视了两个端元挥发性熔融和石灰岩-岩浆反应在硅酸盐岩浆相互作用，与高温岩浆矽卡岩过程。这些挥发性的磁通同步过程需要更好地了解复杂的高T，矽卡岩形成过程，包括混合挥发性渗透脱碳平衡和碳酸盐溶解度与碳酸盐通量的关系，开放与封闭的系统反应，管理差分脱气碳酸盐硅酸盐，碳酸盐immersibility，以及他们的侵位过程，包括爆炸性火山碎屑火山作用;脱气显着改变P？爆炸性地增强这些系统。O & C同位素的瑞利分馏与放射性同位素混合研究有助于限制脱碳过程。

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 associated metal complexes; this is an extension of my 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-host rock reaction coupled with the analysis of physio-chemical reactions, and 3) the provocative petrogenetic interpretation of some derivative igneous rocks, their gases, and eruptive/brecciation 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., Fe, Cu, Au, W, Mo, etc. through to actual volcanic processes. This includes differential degassing at various pressures that can result in hypersaline fluids to salt or carbonate melts (some Fe-rich salt to carbonate melts) that may possibly explain some problematic genetic aspects of certain skarn-related deposit systems, i.e., magnetite-rich IOA & IOCG systems. Recent research of fluid reaction aspects that relate to silica activity relations in low to high T hypersaline systems shows silica activities vary widely, affecting proportion of calc-silicates formed with mineralization, which is critical to interpretation of many of these controversial systems. Mass-balance analysis of various infiltrative skarns compliments this research, although is definitely challenging; detailing the proportion of material added to and (or) removed from metasomatic systems helps to constrains the degree of fluid-rock reaction associated with infiltrative reaction metasomatic systems, the elemental mobility (fluid-rock ratios) observed, and the mechanisms responsible for these endo- and exo-contact reaction zones. The most provocative aspects reexamine the two end-member volatile fluxing and limestone-magma reactions during silicate magma interaction that are related to high-T magmatic skarn processes. These volatile fluxing to syntectic processes require a better understanding of complex high-T, skarn-forming processes, including mixed volatile infiltrative decarbonation equilibria and carbonate solubilities versus carbonate fluxing relations, open versus closed system reactions governing differential degassing of carbonated silicate, carbonate immiscibility, as well as their emplacement processes, including explosive pyroclastic volcanism; degassing significantly changes the P?V enhancing explosively of these systems. Rayleigh fractionation of O & C isotopes with radiogenic isotope mixing studies helps to constrain decarbonation processes.