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: $ 1.41万
• 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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=677043
• 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代岩石（超过25亿年），在整个加拿大地盾中发现。在安大略中部和魁北克勘探新的金矿需要新的技术和方法，可以释放加拿大地盾的资源潜力。最近的研究记录了在元古代（25亿至6亿年前）地壳深处的地质流体的运动，这些运动可能使安大略中部太古代（25亿年前）矿床中的黄金重新流动。确定是什么导致了这些流体的运动以及它们如何使黄金重新流动，可以用来缩小异常黄金富集区的范围，并为公司提供更好的区域指标，以便在寻找新的金矿时最大限度地提高勘探成功率。这项多学科研究计划将（1）确定两个活跃矿山（Island Gold和Young-Davidson）的元古宙流体侵入时间，（2）评估这些流体的来源和成分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集中和分散黄金的地质过程的新见解。该研究项目的结果将为工业界提供新的金矿化指标，以最大限度地提高勘探工作，并最终为加拿大的可持续资源开发做出贡献。