Metallogenetic, structural, metamorphic, stratigraphic and geochronological investigations on gold mineralization styles at the Great Bear deposit, Red Lake greenstone belt, ON

安大略省红湖绿岩带大熊矿床金矿化类型的成矿、结构、变质、地层和年代学研究

• 批准号: 576865-2022
• 负责人: Brueckner, StefanieSM
• 金额: $ 6.3万
• 依托单位: University of Manitoba
• 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=751052
• 关键词: Metallogenetic; structural; metamorphic; stratigraphic; geochronological

The proposed research will focus on the newly discovered Great Bear deposit, owned by Kinross Gold Corp. and is located ca 25km south of the Red Lake mining camp in the Red Lake greenstone belt, northwest Ontario. The Great Bear deposit hosts gold in three different mineralization styles in the direct vicinity of a SE-striking crustal-scale major break, the LP fault zone: (1) LP fault in the footwall of the fault zone, (2) Limb zone, and (3) Hinge zone; the latter two are in the hanging wall of the LP fault. Gold mineralization is hosted in metamorphosed and deformed sedimentary and igneous rocks of either Meso-Archean or Neo-Archean age in all three mineralization styles. To constrain the genesis of the deposit, a multi-faceted approach is used combining fieldwork with cutting edge micro- and nano-analytical techniques and focusing on the mineralogy, geochemistry, structure, metamorphic assemblage, stratigraphy and geochronology of the deposit. These research objectives will be addressed by four highly qualified personnel (1PDF, 1PhD, 2MScs) over a total of 4 years. Results from this research will improve our knowledge of gold mineralization at the Great Bear deposit and the Red Lake greenstone belt, the role of the LP fault regarding gold mineralization and remobilization, provide comparison to gold mineralization in the Red Lake mining camp, re-define current deposit models applied to structurally-controlled gold mineralization, aid in exploration, and potentially lead to new gold discoveries in the area. Results will also advance our understanding of the role of deformation on gold remobilization on the micro- and nano-scale, a fast-emerging field in the geosciences. Results will have impact on on-going exploration in the area and hence also contribute to the economic growth of northern communities in Canada's North.

拟议的研究将集中于新发现的 Great Bear 矿床，该矿床归 Kinross Gold Corp. 所有，位于安大略省西北部红湖绿岩带红湖采矿营地以南约 25 公里处。大熊矿床在东南走向的地壳尺度主要断裂（LP 断层带）附近蕴藏着三种不同矿化类型的金：(1) 断层带下盘的 LP 断层，(2) 边缘带， (3) 铰链区；后两者位于LP断层的上盘。金矿化存在于所有三种矿化类型的中太古代或新太古代时代的变质和变形沉积岩和火成岩中。为了确定矿床的成因，采用了多方面的方法，将现场工作与尖端的微米和纳米分析技术相结合，重点关注矿床的矿物学、地球化学、结构、变质组合、地层学和地质年代学。这些研究目标将由四名高素质人员（1PDF、1PhD、2MSc）在总共 4 年的时间内实现。这项研究的结果将提高我们对大熊矿床和红湖绿岩带金矿化的认识，LP断层在金矿化和再活化方面的作用，提供与红湖矿区金矿化的比较，重新定义当前的矿床模型适用于结构控制的金矿化，有助于勘探，并有可能在该地区带来新的金矿发现。研究结果还将促进我们对微观和纳米尺度上变形对金再活化作用的理解，这是地球科学中一个快速新兴的领域。结果将对该地区正在进行的勘探产生影响，从而也有助于加拿大北部北部社区的经济增长。