Integrated fluid inclusion and petrological studies of the PACMANUS hydrothermal system - building upon the results of ODP Leg 193

该项目将在预定的海洋巡航期间从PACMANUS热液系统获取新样本，并将对硅酸盐和硫酸盐矿物组合进行流体包裹体和岩石学研究。在加热和冷冻技术的基础上，流体包裹体地热测量将阐明该系统过去的热历史，并补充从喷口流体采样、同位素分析、矿物化学和热测量中收集到的信息。含包裹体样品的微探针研究将约束矿物化学，并为流体包裹体研究提供背景。通过合作，还可以分析样品的Cl/Br和氯同位素，这是一种新技术，可以根据与卤水和蒸汽之间的物质分馏有关的原理，限制挥发性输入的性质。该研究计划将有助于进一步分析在PACMANUS进行的ODP 193钻井期间获得的样品，并对该地点进行评估，以便作为IODP的一部分进行潜在的未来钻探。该项目的每个阶段都将有一名本科生参与，包括海洋巡航。

This project will acquire new samples from the PACMANUS hydrothermal system during an already scheduled oceanographic cruise and will conduct fluid inclusion and petrologic studies of the silicate and sulfate mineral assemblages. On the basis of heating and freezing techniques, fluid inclusion geothermometry will elucidate the past thermal history of the system and complement information gleaned from vent fluid sampling, isotopic analyses, mineral chemistry, and thermal measurements. Microprobe studies of the inclusion-bearing samples will constrain mineral chemistry and provide the context for the fluid inclusion studies. Through a collaborative effort, samples may also be analyzed for Cl/Br and chloride isotopes, a new technique that may constrain the nature of the volatile input based on principles related to the fractionation of species between brines and vapor. The research program will contribute to further analysis of samples obtained during ODP Leg 193 drilling at PACMANUS and to the assessment of this site for potential future drilling as part of IODP. The research will involve an undergraduate student at every phase of the project, including the oceanographic cruise.