Seismic studies of Ontario and Quebec - probing the architecture of eastern Laurentia

安大略省和魁北克省的地震研究 - 探索东劳伦西亚的建筑

• 批准号: 341802-2007
• 负责人: Darbyshire, Fiona
• 金额: $ 1.72万
• 依托单位: Université du Québec à Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=458588
• 关键词: Seismic; studies; Ontario; Quebec; probing

The aim of this research programme is to study the crust and upper mantle structure of the eastern Canadian Shield. Data from large distant earthquakes will be used to investigate variations in seismic wave speed and upper mantle alignments across the regions of interest. Recent analysis of surface wave propagation across northern and eastern Ontario sheds light on the complex structure of the Canadian Shield, and is paving the way for analysis of past and present structural alignments and mantle flow patterns. A variety of seismic analysis techniques will be applied to regions of Canada whose structure is not yet well known, in order to study 3-D seismic structure at several scales. I intend to lead detailed studies of the Abitibi Greenstone Belt across the Ontario-Quebec border, and to take an active part in collaborative research into the deep structure of Hudson Bay (in conjunction with the Hudson Bay Lithospheric Experiment). Expansion of the POLARIS (Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity) seismograph network throughout Quebec will allow crust and upper mantle studies of the eastern Canadian Shield, resulting in a more complete picture of the seismic structure of the entire Superior Province and its surroundings. The resulting 3-D models will be combined with information from other geophysical disciplines to provide new insights into the tectonic history of eastern and central Canada, and the interaction of the thick continental root with regional and global mantle flow patterns.

这一研究方案的目的是研究加拿大东部地盾的地壳和上地幔结构。来自遥远大地震的数据将用于研究地震波速度和上地幔排列在感兴趣地区的变化。最近对安大略省北部和东部的表面波传播的分析揭示了加拿大地盾的复杂结构，并为分析过去和现在的结构排列和地幔流动模式铺平了道路。多种地震分析技术将应用于加拿大构造尚不清楚的地区，以便在几个尺度上研究三维地震结构。我打算领导横跨安大略省和魁北克省边界的阿比提比绿岩带的详细研究，并积极参与哈德逊湾深层结构的合作研究（与哈德逊湾岩石圈实验一起）。在魁北克省扩展POLARIS（岩石圈分析和研究地震活动的便携式观测站）地震仪网络，将允许对加拿大东部地盾的地壳和上地幔进行研究，从而获得整个苏必利尔省及其周边地区地震结构的更完整图像。由此产生的三维模型将与来自其他地球物理学科的信息相结合，为加拿大东部和中部的构造历史，以及厚厚的大陆根与区域和全球地幔流动模式的相互作用提供新的见解。