RUI: Pressure-temperature Constraints and Fluid Evolution for Sediment-hosted Gold and Intrusion-related Mineralization, Getchell, Nevada

该提案的主要目标是：1）确定 卡林型金存款的形成条件; 在时间上连接或分离盖特沃金系统 以及邻近的90 Ma花岗闪长岩侵入体和相关的 成矿 这些目标将通过以下方式实现：1） 金的详细岩相学和流体包裹体研究 用于约束地层压力和温度的系统， 水流体化学，和2）详细的岩相和 石英脉和钨夕卡岩流体包裹体研究 成矿作用与花岗闪长岩侵入有关， 得到类似的约束。 流体包裹体 通过显微测温和显微分析进行评估，包括 拉曼光谱法、四极质谱法和离子 层析 该系统提供了独特的 有机会详细审查物理/化学 卡林型存款的演化 初步结果 证明存在的流体包裹体适合于 显微测温、拉曼光谱和四极质谱 光谱法 本研究将记录 有利于金沉淀的物理/化学条件 金矿化与岩浆岩的关系 卡林型系统中的活动。 结果将链接或 及时将与黄金和入侵有关的 矿化，并可能对 某卡林型存款金矿化时代

The primary goals of this proposal are: 1) to determine the formation conditions of a Carlin-type gold deposit, and 2) to either link or separate in time the Getchell gold system and an adjacent 90 Ma granodiorite intrusion and related mineralization. These goals will be accomplished by 1) a detailed petrographic and fluid inclusion study of the gold system to constrain formation pressures and temperature and aqueous fluid chemistry, and 2) a detailed petrographic and fluid inclusion study of quartz veins and tungsten skarn mineralization related to the granodiorite intrusion, to obtain similar constraints. Fluid inclusions will be evaluated by microthermometry and microanalyses including Raman spectroscopy, quadrupole mass spectrometry, and ion chromatography. The Getchell system provides a unique opportunity to examine, in detail, the physical/chemical evolution of a Carlin-type deposit. Preliminary results demonstrate that fluid inclusions present are suitable for microthermometry, Raman spectroscopy, and quadrupole mass spectrometry. This study will document the physical/chemical conditions conducive to gold precipitation and the relationship between gold mineralization and igneous activity in Carlin-type systems. Results will link or separate in time the gold- and intrusion-related mineralization and may place important constraints on the age of gold mineralization in a Carlin-type deposit.