Impact of metamorphism and deformation on metal mobility at the microscale to nanoscale in orogenic gold systems

造山金系统中变质作用和变形对微米级至纳米级金属流动性的影响

• 批准号: RGPIN-2022-04118
• 负责人: Brueckner, Stefanie
• 金额: $ 1.89万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754962
• 关键词: Impact; metamorphism; deformation; metal; mobility

Metamorphism and deformation impact the mobility of metals (e.g., Au, Bi, Te) in hydrothermal mineral systems including orogenic gold systems which are a major contributor to Canada's leading role as Au producer. The impact of deformation and metamorphism is well constrained on the district and deposit scale but poorly understood on the microscale to nanoscale specifically within sulfides and quartz. The proposed research program investigates how metal mobility in orogenic gold systems within the Uchi Subprovince of Manitoba and Ontario is impacted by varying degrees of metamorphism and deformation. Specifically, the role of microstructures in pyrite and quartz is investigated regarding metal (Au, Bi, Te) mobility and variations in metal abundance on the grain scale. The program will provide opportunities to train ten highly qualified personnel by exposing them to a variety of fieldwork methods including the use of handheld instrumentation in combination with cutting-edge micro- and nano-technologies to constrain the research questions. This training will prepare HQP for highly sought-after roles in the natural sciences including economic geology, geometallurgy, material sciences, engineering and/or geochemical analyses. The results of my program will impact our understanding what role metamorphism and deformation play in pyrite and quartz regarding metal mobility; what processes cause metal mobility during metamorphism and deformation at different metamorphic conditions; and how metals are transported during deformation and metamorphism on the microscale and nanoscale. This advances our knowledge of metal mobility on the grain scale in metamorphosed and deformed orogenic gold systems and the used methods can be applied to other metamorphosed and deformed mineral systems domestically and globally. Additionally, the results will improve metal recovery rates and hence impact metallurgical processes since knowledge is gained where and how metals accumulate in deformed sulfides and quartz. Finally, the research program will make meaningful advancements on the combined field of microtexture, microstructure, and geochemical micro- and nano-analyses applied to geological processes, which is currently under-represented in its investigation within Canada.

变质和变形会影响金属（例如Au，bi，te）在水热矿物系统中的迁移率，包括造山金系统，这是加拿大作为AU作为AU生产商的主要作用的主要贡献者。变形和变质的影响在地区和存款量表上受到了良好的限制，但在微观尺度上对纳米尺度上的理解很少，特别是在硫化物和石英中。拟议的研究计划调查了曼尼托巴省Uchi Subprovince和安大略省造型金系统中的金属迁移率如何受到不同程度的变质和变形的影响。具体而言，研究了微观结构在黄铁矿和石英中的作用，研究了金属（AU，BI，TE）的迁移率和金属丰度在晶粒尺度上的变化。该计划将提供机会，通过使十名高素质的人员接触到各种现场工作方法，包括使用手持仪器与尖端的微型和纳米技术结合使用手持仪器来限制研究问题。这项培训将为HQP准备高度抢手的自然科学作用，包括经济地质学，几何助理，材料科学，工程和/或地球化学分析。我程序的结果将影响我们理解黄铁矿和石英在金属迁移率中的作用变质和变形的作用；在不同变质条件下变质和变形过程中，什么过程导致金属迁移率；以及如何在显微镜和纳米级变形和变质过程中转运金属。这可以提高我们在变形和变形的造山学金系统中对金属迁移率上的金属迁移率的了解，并且可以将使用的方法应用于其他变形和变形的矿物质系统。此外，由于知识在何处以及如何在变形的硫化物和石英中积累的金属积累，因此结果将提高金属回收率，从而影响冶金过程。最后，该研究计划将在微纹理，微观结构以及地球化学微观结构的合并领域以及应用于地质过程中的地球化学微观和纳米域上取得有意义的进步，该过程中目前在加拿大在加拿大的调查中代表性不足。