S02 - Tectonics and geophysics in western Canada and the Canadian Cordillera
Date & Time
Tuesday, May 9, 2023, 3:30 PM - 5:00 PM

Western Canada, including the Canadian Cordillera, is a region of past and current complex active tectonics. This includes multiple periods of orogenesis, lithospheric-scale fault systems, and past and present magmatism. Spanning from British Columbia to the Beaufort Sea, the complex geology of the region consists of multiple accreted terranes juxtaposed next to the North American craton. Recent advances in geophysical instrumentation (in particular, throughout northwestern Canada) as well as future planned experiments (e.g., EON-ROSE) motivate a wide range of tectonic studies of the Canadian Cordillera. We welcome contributions addressing questions of the structure and dynamics of the Canadian Cordillera, from local to regional scales, and from the surface to the mantle. We also welcome contributions investigating scientific questions that have implications for natural hazards and exploration (e.g., geothermal) throughout western Canada. We encourage multi-disciplinary contributions including (but not limited to) structural (geophysical) imaging, remote sensing, and numerical modelling.  

Oral talks:

3:30 - 3:45: The crust and upper mantle thermal regime in the northern Canadian and Alaska Cordillera from eight constraints, and some consequences
Presenter(s): Roy Hyndman

3:45 - 4:00: Origin of thin lithosphere for the Southern Canadian Cordillera
Presenter(s): Claire Currie, University of Alberta, Tai-Chieh Yu, Department of Physics, University of Alberta

4:00 - 4:15: Lithospheric underplating beneath southeastern Canadian Cordillera
Presenter(s): Yu Gu, Professor of Geophysics, University of Alberta, Songyun Huang, University of Alberta, Stephen T. Johnston, University of Alberta (3rd author)

4:15 - 4:30: Lithospheric Fabric and Active Mantle Flow Beneath Canada from Craton to Cordillera: Evidence from Depth-Dependent Seismic Anisotropy
Presenter(s): Fiona Darbyshire, Professor, Université du Québec à Montréal, Aarti Sharma, Department of Earth Sciences, University of Manitoba, Andrew Frederiksen, Department of Earth Sciences, University of Manitoba

4:30 - 4:45: Variations in Lithospheric Fabric Across the Cordillera/Shield Boundary: Effect of Different Averaging Methods
Presenter(s): Andrew Frederiksen, Professor, University of Manitoba, Christian Phillips, University of Manitoba (now at University of Calgary)

4:45 - 5:00: Investigating the seismicity and structure of the Queen Charlotte plate boundary using 20+ years of seismic data
Presenter(s): Sarah Jaye Oliva, , University of Victoria, MG Bostock, Department of Earth, Atmospheric and Oceans Sciences, University of British Columbia, BC, Canada, AJ Schaeffer, Pacific Geoscience Centre, Geological Survey of Canada, BC, Canada, R Merrill, Department of Earth, Atmospheric and Oceans Sciences

Session Type