Collaborative Research: ICPMS and Laser Ablation-ICPMS (LA-ICPMS) for the Determination of Metals in Fluid Inclusions: A Pilot Study

9505982 Ruiz本建议旨在评估ICPMS和LA-ICPMS在测定流体包裹体中的痕量元素，包括稀土元素(REE)方面的使用。初步数据表明，对表征良好的样品进行整体渗滤液分析是有用的，也表明LA-ICPMS分析单个流体包裹体是可能的。完善这些技术可能使我们能够直接分析热液系统不同阶段的流体，这反过来又将进一步加深我们对成矿流体中金属运移的理解。在这项研究中，我们将完成三个主要目标：(1)充分开发破碎ICPMS用于分析稀土和其他具有岩石学和经济意义的痕量金属的块状包裹体；(2)评估LA-ICPMS在单个流体包裹体研究方面的全部潜力；(3)对块状流体包裹体进行详细的ICPMS研究，并对宾厄姆贱金属斑岩系统中的单个流体包裹体进行LA-ICPMS研究，以确定该系统中哪些流体携带了大量金属。之所以选择宾厄姆，是因为它的研究非常深入，而且在石英中含有大量包裹体。这里提出的研究需要限制目前关于与硅质岩浆系统有关的矿床中金属来源的争论。

9505982 Ruiz This proposal intends to evaluate the use of ICPMS and LA-ICPMS for the determination of trace elements, including rare earth elements (REE) in fluid inclusions. Preliminary data shown in this proposal suggest that the bulk leachate analyses of well characterized samples are useful and also indicate that it is possible to analyze single fluid inclusions by LA-ICPMS. perfecting these techniques may allow us to directly analyze fluids from various stages of hydrothermal systems which in turn will further our understanding of the transport of metals in ore-forming fluids. We will accomplish three main goals during this study: (1) fully develop the crush-leach ICPMS for analyzing bulk inclusions for REE and other petrologically and economically important trace metals, (2) evaluate the full potential of LA-ICPMS for the study of single fluid inclusions, (3) conduct a detailed ICPMS study on bulk fluid inclusions and LA-ICPMS study on single fluid inclusions from the Bingham, base metal porphyry system in order to determine which fluids carried the bulk of the metals in this system. Bingham was chosen because it is very well studied and contains large inclusions in quartz. Studies as the one proposed here are needed to constrain current debates on sources of metals in deposits associated with silicic magma systems.