AGU 2017 Fall Meeting Sessions
Session: Multidisciplinary advances in the study of the Northern Cordillera of North America
Tuesday, December 12, 2017
08:00 – 10:00 Local Time
Primary Convener: Andrew J Scaeffer
Conveners: Kristin D Morell, Katherine JE Boggs, Hersh J Gilbert
The Northern Cordillera is a complex and enigmatic tectonic mosaic. We propose to bring together geoscientists engaged in multidisciplinary studies of slab window dynamics, insipient ridge subduction, ocean-continent transform faulting, and the collision of an oceanic plateau (Yakutat) into a continental margin. The session seeks to facilitate future investigations by examining results from diverse approaches that seek to understand stress transfer deep into continental interiors and how it produces distributed deformation across a zone >500 km wide. An increase in induced seismicity in the Cordilleran foreland, combined with natural seismicity, poses a significant hazard to infrastructure and highlights the need to better know its origins. Multi-scale integration of surficial processes with deeper lithospheric and mantle structures for understanding cordilleran dynamics will be of particular interest in this session. We seek contributions from broad sub-disciplines of geoscience focused on the Northern Cordillera, including surficial geology, geochronology, tectonics, geophysics, petrology, and geochemistry.
For more information, including session description, visit https://agu.confex.com/agu/fm17/preliminaryview.cgi/Session25691
Session: Seismically surveying North America: synthesis and emerging ideas as USArray spans Alaska and the CCArray builds momentum
Thursday, December 14, 2017
10:20 – 12:20 Local Time
Primary Convener: Brandon Schmandt
Conveners: Scott Burdick, Pascal Audet, Emily Hopper
A systematic broadband seismic survey of an entire continent is a former pipe dream from the seismology community that has recently made major steps toward reality. The EarthScope program’s USArray Transportable Array has successfully covered the contiguous 48 states of the US, and is just reaching its maximum extent in Alaska and northwestern Canada. This session welcomes studies striving to synthesize new insights into continental structure, wave propagation, and seismic sources illuminated by comprehensive coverage of the contiguous US, as well as studies with nascent results and hypotheses from Alaska and northwestern Canada. Coverage of North America remains incomplete and the growing CCArray initiative may offer an opportunity to connect the existing broadband data sets by systematically sampling the Canadian Cordillera. Studies with relevance to the potential science targets, design, and capabilities of the CCArray concept are encouraged.
For more details, including the session description, visit: https://agu.confex.com/agu/fm17/preliminaryview.cgi/Session24626