Geological evolution and mineral resource potential of the Mesoproterozoic Fury and Hecla basin, Northern Baffin Island

巴芬岛北部中元古代Fury和Hecla盆地地质演化及矿产资源潜力

• 批准号: 506660-2017
• 负责人: Halverson, Galen
• 金额: $ 15.53万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 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=694596
• 关键词: Geological; evolution; mineral; resource; potential

The late Mesoproterozoic (ca. 1.1 billion years old) Bylot basins in northeastern Nunavut are important both for their resource potential (e.g. the Nanisivik Pb-Zn deposit) and for the information they preserve on the tectonic history of Proterozoic North America and the biogeochemical evolution of Earth's surface environment. The Fury and Hecla basin, which straddles the Fury and Hecla Sound between northwestern Baffin Island and the Melville Peninsula, is the least studied of the Bylot basins, but is nevertheless well exposed, relatively accessible, and prospective for U and sediment-hosted base metal mineralization. The Canada-Nunavut Geoscience Office (C-NGO) is planning a two-year bedrock mapping program in the Fury and Hecla region, with field seasons in 2018 and 2019. We propose to work with C-NGO to maximize the research outcomes of this fieldwork and provide a synergistic training opportunity for three graduate students to carry out thematic projects. Specifically, we will participate in the proposed fieldwork in the Fury and Hecla region with aims of 1) updating the stratigraphic framework of the Fury and Hecla Group, 2) generating new geochemical and geochronological data from sedimentary and volcanic strata in the stratigraphic succession, and 3) developing a new model for the evolution of the Fury and Hecla basin within the broader context of the tectonic origin of Bylot basins. The results will contribute directly to the C-NGO mandate of expanding geoscience knowledge in Nunavut while also providing important geological and geochemical baselines for future mineral exploration, informing broader questions of the tectonic history of northern Canada spanning the assembly of the supercontinent Rodinia, and documenting the biogeochemical evolution of the atmosphere and oceans at a time when early eukaryotes were diversifying and oxygen levels were increasing.

努纳武特东北地区晚中元古代（约11亿年）Bylot盆地不仅具有丰富的资源潜力（如Nanisivik铅锌矿床），而且还保存着北美元古代构造史和地球表面环境生物地球化学演化的信息。Fury和Hecla盆地横跨巴芬岛西北部和梅尔维尔半岛之间的Fury和Hecla海峡，是Bylot盆地中研究最少的盆地，但仍然暴露良好，相对容易开采，并且具有铀和沉积物为主的贱金属成矿的前景。加拿大努纳武特地球科学办公室（C-NGO）计划在Fury和Hecla地区进行为期两年的基岩测绘计划，在2018年和2019年进行实地勘探。我们建议与C-NGO合作，最大限度地发挥此次实地考察的研究成果，并为三名研究生开展专题项目提供协同培训机会。具体来说，我们将参与Fury和Hecla地区的野外工作，目的是1)更新Fury和Hecla群的地层格架，2)从地层演替中的沉积和火山地层中获得新的地球化学和地质年代学数据，以及3)在Bylot盆地构造起源的更广泛背景下为Fury和Hecla盆地的演化建立新的模型。这些结果将直接有助于C-NGO扩大努纳武特地球科学知识的任务，同时也为未来的矿产勘探提供重要的地质和地球化学基线，为跨越超大陆罗迪尼亚组合的加拿大北部构造历史提供更广泛的问题，并记录早期真核生物多样化和氧气水平增加时大气和海洋的生物地球化学演化。