T21D:
Multidisciplinary Advances in the Study of the Northern Cordillera of North America

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Session ID#: 31259

Session Description:
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.

Primary Convener:  Andrew J Schaeffer, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Conveners:  Kristin D Morell, University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States, Katherine Janet Elizabeth Boggs, Mount Royal University, Calgary, AB, Canada and Hersh J Gilbert, University of Calgary, Department of Geoscience, Calgary, AB, Canada
Chairs:  Hersh J Gilbert, University of Calgary, Department of Geoscience, Calgary, AB, Canada and Andrew J Schaeffer, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
OSPA Liaison:  Hersh J Gilbert, University of Calgary, Department of Geoscience, Calgary, AB, Canada

Cross-Listed:
  • MR - Mineral and Rock Physics
  • NH - Natural Hazards
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

8104 Continental margins: convergent [TECTONOPHYSICS]
8107 Continental neotectonics [TECTONOPHYSICS]
8123 Dynamics: seismotectonics [TECTONOPHYSICS]
8164 Stresses: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Cenozoic deformation from the Yakutat–North American collision to the eastern margin of the Northern Canadian Cordillera (Invited) (207229)
Eva Enkelmann, University of Calgary, Calgary, AB, Canada
Exotic Members of Southern Alaska’s Jurassic Arc (292498)
Erin Todd1, James V Jones III1, Susan M Karl1, Stephen Box2 and Peter J Haeussler3, (1)USGS Alaska Science Center, Anchorage, AK, United States, (2)USGS, Spokane, United States, (3)U.S. Geological Survey, Anchorage, AK, United States
Role of the Yakutat collision and upper mantle dynamics in the present-day tectonics of the North America Northern Cordillera (Invited) (284857)
Stephane Mazzotti1,2, Alizia Tarayoun3, Anaïs Marechal1 and Pascal Audet4, (1)Organization Not Listed, Washington, DC, United States, (2)Université de Montpellier, Geosciences Montpellier, Montpellier, France, (3)Géosciences Montpellier, Montpellier Cedex 05, France, (4)University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Active Deformation of the Northern Cordillera Observed with GPS (294145)
Julie Elliott, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Yan Jiang, Geological Survey of Canada, Sidney, Canada, Lucinda J Leonard, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, Roy D Hyndman, Geological Survey of Canada, Sidney, BC, Canada, Jeff Freymueller, University of Alaska Fairbanks, Fairbanks, AK, United States and Stephane Mazzotti, Géosciences Montpellier, Montpellier Cedex 05, France
Tomotectonic constraints on deformation of Cordilleran North America since Late Jurassic (Invited) (258022)
Mitchell G Mihalynuk, British Columbia Geological Survey, Victoria, BC, Canada and Karin Sigloch, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
New Insight into the Role of Tectonics versus Gravitational Deformation in Development of Surface Ruptures along the Ragged Mountain Fault, Katalla, Alaska USA: Applications of High-Resolution Three-Dimensional Terrain Models (300592)
Sarah N Heinlein, University of Houston Downtown, Houston, TX, United States, Terry L Pavlis, University of Texas at El Paso, El Paso, TX, United States, Ronald L Bruhn, Univ Utah, Hansville, WA, United States and James P McCalpin, Geohaz Consultants, Crestone, CO, United States

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