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.

拟议的研究将集中在新发现的大熊矿藏，该矿藏由Kinross Gold Corp.拥有，位于安大略省西北部红湖绿岩带红湖矿营以南约25公里处。大熊矿床在南东向地壳规模主断裂带的直接附近有三种不同的矿化类型，即LP断裂带：(1)断裂带下盘的LP断裂，(2)肢体带，(3)铰链带，后两者位于LP断裂的上盘。金矿化赋存于中太古代或新太古代变质变形的沉积岩和火成岩中，三种成矿类型均为金矿化。为了约束矿床的成因，采用了多方面的方法，结合野外工作和尖端的微观和纳米分析技术，重点研究了矿床的矿物学、地球化学、构造、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的人员(1名PDF、1名博士、2名硕士)在总共4年的时间内完成。研究结果将提高我们对大熊矿床和红湖绿岩带金矿成矿作用的认识，加深我们对LP断裂在金矿化和再活化方面的作用的认识，提供与红湖矿营金矿化的对比，重新定义适用于构造控制的金矿成矿的现有矿床模式，有助于勘探，并有可能导致该地区新的金矿发现。研究结果还将促进我们在微米和纳米尺度上对金的再动员作用的理解，这是地球科学中一个快速崛起的领域。结果将对该地区正在进行的勘探产生影响，因此也有助于加拿大北部北部社区的经济增长。