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

西澳大利亚州伊尔加恩克拉通表层、中观和叠层地壳部分的含金太古宙热液系统

• 批准号: 9508257
• 负责人: Philip Brown
• 金额: $ 10.8万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9508257&HistoricalAwards=false
• 关键词: Gold; Bearing; Archean; Hydrothermal; Systems

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.

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.或珀斯重点中心的研究人员对地质、蚀变和放射性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、气体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探针分析将首次用于约束金属（如Au， Cu, as, Sb），氩气和流体包裹体群。然后，这些数据将用于量化可能的化学过程，例如不同地壳水平上的流体不混溶和/或流体混合。这项研究将对世界范围内寻找在极低和高品位变质地形中，可能仍隐藏在地表以下的金矿床产生深远的影响。