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

努纳武特东北部的中元古代晚期(约11亿年前)的比洛特盆地具有重要的资源潜力(例如纳尼西维克铅锌矿床)，以及它们保存的关于北美元古界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Baffin岛西北部和Melville半岛之间的Fury和Hecla Sound，是Bylot盆地中研究最少的，但仍然暴露良好，相对容易获得，并具有铀和沉积物赋存的贱金属矿化前景。加拿大-努纳武特地球科学办公室(C-NGO)正在计划在Fury和Hecla地区开展一项为期两年的基岩测绘计划，外业季节为2018年和2019年。我们建议与C-NGO合作，最大限度地发挥这一实地工作的研究成果，并为三名研究生提供开展专题项目的协同培训机会。具体地说，我们将参与Fury和Hecla地区的拟议实地工作，目的是1)更新Fury和Hecla群的地层框架，2)从地层序列中的沉积和火山层生成新的地球化学和地质年代学数据，以及3)在更广泛的比洛特盆地构造起源的背景下开发Fury和Hecla盆地演化的新模式。这些成果将直接有助于C-NGO的任务，即扩大努纳武特的地球科学知识，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，揭示加拿大北部跨越罗迪尼亚超大陆组装的构造史的更广泛问题，并记录早期真核生物多样化和氧气水平上升时大气和海洋的生物地球化学演变。

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.******