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存款，拥有金罗斯黄金公司，位于约25公里以南的红湖采矿营地在红湖绿岩带，西北安大略。大熊存款在三种不同的矿化类型中含有金，这些矿化类型位于SE走向的地壳规模的主要断裂带LP断裂带附近：（1）断裂带下盘的LP断裂，（2）边缘带，和（3）铰链带;后两个位于LP断裂的上盘。三种成矿类型的金矿化均产于中太古代或新太古代变质变形的沉积岩和火成岩中。为了限制存款的成因，采用了多方面的方法，结合野外工作与尖端的微观和纳米分析技术，并侧重于存款的矿物学，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的人员（1 PDF，1 PhD，2 MSC）在总共4年内解决。本研究的结果将提高我们对大熊存款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，提供与红湖采矿营地金矿化的比较，重新定义适用于构造控制金矿化的当前存款模型，帮助勘探，并可能导致该地区新的金矿发现。研究结果也将促进我们对变形在微纳米尺度上对金再活化作用的理解，这是地球科学中一个快速发展的领域。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方社区的经济增长。