Genesis of gold mineralisation in the Detour-Fenelon belt, Northern Abitibi subprovince

北阿比蒂比省Detour-Fenelon带金矿化成因

• 批准号: 566914-2021
• 负责人: WilliamsJones, AnthonyAE
• 金额: $ 7.18万
• 依托单位: McGill University
• 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=751005
• 关键词: Genesis; gold; mineralisation; Detour; Fenelon

The Abitibi is the World's largest greenstone belt and is mainly responsible for the ~75% of Canadian gold production coming from Ontario and Québec valued at ~$8.4 billion annually. Most of the Abitibi production has come from its well-exposed southern regions. In comparison, the northern regions have seen limited exploration, due to poor outcrop, limited field access and a general sentiment that this part of the Abitibi has lower potential for the discovery of large gold orebodies. This view, however, has changed following the development of the Detour Mine and the recent discovery of a large gold system at Fenelon by the partner, Wallbridge Mining. Although the structural setting is consistent with Fenelon being an orogenic-type deposit, it is atypical in that the gold is accompanied by a relatively high content of copper, pyrrhotite is the dominant sulphide mineral instead of pyrite, and quartz-carbonate veins are conspicuously absent in the main mineralised zones. The research, which will be conducted by a team selected using EDI best-practices, will involve characterising the mineralisation and alteration and their relationships to microstructural and metamorphic features in order to establish the nature of the mineralisation and associated alteration and their relationships to deformation and metamorphism. This will be complemented by mineral and bulk chemical, stable and radiogenic isotope, and fluid inclusion studies study that, in conjunction with a thermodynamic analysis of phase equilibria, will be used to determine the physicochemical conditions of mineralisation and alteration. The resulting framework will be used, in combination with geochronological data, to develop a genetic model for Fenelon that will be applied locally and refined regionally for the Detour-Fenelon belt where Wallbridge has significant interests. The project will provide the company with access to research products that will enable it optimise its exploration strategy for gold mineralisation at Fenelon and for the discovery of new deposits in the Detour-Fenelon belt. Canada will benefit from the development of new tools for exploring for gold in greenstone terrains and from the training of highly qualified personnel needed to conduct such exploration.

Abitibi是世界上最大的绿岩带，主要负责来自安大略和魁北克的加拿大黄金产量的75%，每年价值约84亿美元。Abitibi的大部分产量来自其暴露良好的南部地区。相比之下，北方地区的勘探有限，原因是露头不好，实地访问有限，以及普遍认为Abitibi的这一部分发现大型金矿体的潜力较低。然而，随着Detour矿的开发以及合作伙伴Wallbridge Mining最近在Fenelon发现一个大型金矿系统，这种看法已经改变。虽然构造背景与Fenelon为造山型存款一致，但其非典型性在于金伴随着相对高含量的铜，磁黄铁矿是主要的硫化物矿物而不是黄铁矿，并且在主要矿化带中明显缺乏石英碳酸盐脉。该研究将由使用EDI最佳实践选择的团队进行，将涉及表征矿化和蚀变及其与显微结构和变质特征的关系，以确定矿化和相关蚀变的性质及其与变形和变质的关系。这将通过矿物和散装化学，稳定和放射性同位素，以及流体包裹体研究来补充，结合相平衡的热力学分析，将用于确定矿化和蚀变的物理化学条件。由此产生的框架将被用来，结合地质年代学数据，开发一个Fenelon的遗传模型，将在当地应用和细化区域的Detour-Fenelon带，其中Wallbridge有显着的利益。该项目将为公司提供研究产品，使其能够优化Fenelon金矿化的勘探战略，并在Detour-Fenelon带发现新矿床。加拿大将受益于开发新的工具，在绿岩地体勘探黄金，并受益于培训进行这种勘探所需的高素质人员。