The source of gold and fluid evolution of the Klondike gold district, Yukon Territory

育空地区克朗代克金矿区的黄金来源和流体演化

• 批准号: 576702-2022
• 负责人: Gregory, DanielDD
• 金额: $ 1.46万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 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=743882
• 关键词: source; gold; fluid; evolution; Klondike

This proposal will investigate the formation and source of gold in the Lone Star gold deposit, Yukon. This will be done using a combination of detailed diamond drill core logging, reflected light microscopy, and scanning electron microscopy to determine different generation of sulfide and gold mineralization and common alteration minerals associated with the gold mineralization. The different vein generations and their relative timing with be determined using cross cutting relationships. Molybdenite dating will be used to identify the date of formation. This will be followed by laser ablation inductively couple plasma mass spectrometry (LA-ICPMS) spot analyses, LA-ICPMS map analyses, secondary ion mass spectrometry (SIMS) on selected pyrite generations. These data will be used to understand the source and evolution of the fluids and metals within the system. The pyrite trace element and sulfur isotope data will be supplemented with fluid inclusion analyses to gain an understanding of the salinity, temperature of formation, and CO2 content of the fluids. These data will then be used to develop a geological model for the formation of the deposit which will then be used to identify areas else where in the district that are also prospective for mineralization.

本文拟对育空地区龙星金矿的成因及来源进行研究。这项工作将结合详细的金刚石岩心测井、反射光显微镜和扫描电子显微镜来确定不同世代的硫化物和金矿化以及与金矿化相关的常见蚀变矿物。利用横切关系确定不同脉代及其相对时间。辉钼矿定年法将用于确定形成日期。随后将对选定的黄铁矿世代进行激光烧蚀电感耦合等离子体质谱（LA-ICPMS）斑点分析、LA-ICPMS图谱分析、二次离子体质谱（SIMS）分析。这些数据将用于了解系统内流体和金属的来源和演变。黄铁矿微量元素和硫同位素数据将辅以流体包裹体分析，以了解流体的盐度、地层温度和二氧化碳含量。然后，这些数据将用于开发矿床形成的地质模型，该模型将用于确定该地区其他同样有矿化前景的地区。