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

这项研究计划的目的是研究加拿大东部地盾的地壳和上地幔结构。来自远距离大地震的数据将被用来调查感兴趣地区的地震波速和上地幔排列的变化。最近对横跨安大略省北部和东部的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。各种地震分析技术将被应用于加拿大结构尚不为人熟知的地区，以在多个尺度上研究三维地震结构。我打算领导对跨越安大略省-魁北克边界的Abitibi Greenstone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)。扩大整个魁北克的北极星(调查地震活动的便携式岩石圈分析和研究观测站)地震仪网络将允许对加拿大东部地盾进行地壳和上地幔研究，从而更全面地了解整个Superior省及其周围地区的地震结构。由此产生的3-D模型将与其他地球物理学科的信息相结合，以提供对加拿大东部和中部构造历史的新见解，以及厚重的大陆根与区域和全球地幔流动模式的相互作用。

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.