Proterozoic remobilization of gold in shear-zone hosted Archean deposits

太古代矿床剪切带中元古代金的再活化

• 批准号: 543576-2019
• 负责人: Yakymchuk, Christopher
• 金额: $ 3.93万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720736
• 关键词: Proterozoic; remobilization; gold; shear; zone

The most important source of gold in Canada is Archean rocks (greater than 2.5 billion years old) that are found throughout the Canadian Shield. Exploration for new gold deposits in central Ontario and Quebec requires new techniques and approaches that can unlock the resource potential of the Canadian Shield. Recent research has documented the movement of geological fluids deep in the Earth's crust during the Proterozoic eon (2.5 to 0.6 billion years ago) that likely remobilized gold in the Archean eon (older than 2.5 billion years ago) deposits in central Ontario. Determining what caused the movement of these fluids and how they may have remobilized gold can be used to narrow in on zones of anomalous gold enrichment and provide companies with better indicators of regions to focus on or avoid in order to maximize their exploration success when looking for new gold deposits. This multidisciplinary research program will (1) determine the timing of Proterozoic fluid ingress at two active mines (Island Gold and the Young-Davidson), (2) evaluate the source and composition of these fluids and their potential to remobilize gold, and (3) provide gold exploration companies with new insights into the geological processes that concentrate and disperse gold in the Canadian Shield. The results of this research program will provide industry with new and novel indicators of gold mineralization to maximize exploration efforts and ultimately contribute to sustainable resource development in Canada.

加拿大最重要的黄金来源是太古宙岩石(超过25亿年)，这些岩石在加拿大盾中随处可见。在安大略省中部和魁北克省勘探新的金矿需要新的技术和方法，可以释放加拿大盾的资源潜力。最近的研究记录了元古界(25亿至6亿年前)地壳深处的地质流体运动，这些流体可能重新活化了安大略省中部太古宙(25亿年前)矿床中的黄金。确定是什么导致了这些流体的运动，以及它们可能如何重新活化了黄金，可以用来缩小异常金矿富集区的范围，为公司提供更好的区域指标，以便在寻找新的金矿床时最大限度地取得勘探成功。这一多学科研究计划将(1)确定两个活跃矿山(Island Gold和Young-Davidson)元古代流体进入的时间，(2)评估这些流体的来源和组成及其重新活化黄金的潜力，以及(3)为黄金勘探公司提供对加拿大地盾中金的浓缩和分散的地质过程的新见解。这项研究计划的结果将为工业提供新的和新颖的金矿化指标，以最大限度地扩大勘探努力，并最终为加拿大的可持续资源开发做出贡献。