Gold-Bearing Archean Hydrothermal Systems in Epi-, Meso-, and Katazonal Crustal Sections, Yilgarn Craton, Western Australia

9508257 Brown 这项研究的目标是仔细整合各种创新的地球化学技术，这些技术建立在 P.I. 或珀斯关键中心的研究人员所做的地质、蚀变和放射成因工作的详细描述的基础上。 计划通过详细的流体包裹体、FTIR 和激光拉曼光谱、气相色谱和离子色谱以及激光稳定同位素分析来量化化石热液系统的热液流体成分。 此外，新的创新惰性气体和 PIXE 探针对精心挑选的单个和流体包裹体组的分析将首次用于约束金属（如金、铜、砷、锑）、氩和流体包裹体组。 然后，该数据将用于量化可能的化学过程，例如不同地壳层面的流体不混溶性和/或流体混合。 这项研究将对全世界寻找金矿床产生深远的影响，这些金矿床位于非常低品位和高品位的变质岩地形中，可能仍然隐藏在地表之下。

9508257 Brown The goal of this study is to carefully integrate a variety of innovative geochemical techniques that build upon detailed descriptions of geological, alteration and radiogenic work done by the P.I.s or researchers from the key Centre in Perth. It is planned to quantify the hydrothermal fluid components of the fossil hydrothermal systems with detailed fluid inclusion, FTIR and laser-Raman spectroscopy, gas- and ion-chromatography, and laser stable isotope analyses. In addition, new innovative noble gas and the PIXE probe analyses on carefully selected individual as well as groups of fluid inclusions will be used to constrain, for the first time, metals (such as Au, Cu, As, Sb), argon and groups of fluid inclusions. This data will then be used to quantify possible chemical processes such as fluid immiscibility and/or fluid mixing at the different crustal levels. This study will have profound influence on the worldwide search for gold deposits that are hosted in very low- and high-grade metamorphic terrains, possibly still concealed beneath the surface.