T51C:
Revisiting the Tectonics, Regional Structure, and Geodynamics of Alaska and the North Pacific II Posters


Session ID#: 9027

Session Description:
The Pacific-North American plate boundary in Alaska is in the scientific spotlight now because of the spectacular geology and tectonic processes preserved and ongoing in the region, and the major financial investment by the National Science Foundation through EarthScope and GeoPRISMS. It is timely to review the available data and tectonic-geodynamic models, as several major new scientific efforts are now in their infancy. Certain tectonic components have a first order effect, including the impact of the subduction of the Yakutat terrane, and the role of lithospheric heterogeneity from broad scales to more localized zones of weakness, such as the Denali fault. In this diffuse plate boundary, active deformation is partitioned across a large area, including related tectonic systems in Canada and Russia. We welcome submissions using observational and modeling studies relevant to the Alaska-Aleutian subduction zone and the North Pacific region, including new work and review or integrative submissions.
Primary Convener:  Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
Conveners:  Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States and Douglas H Christensen, University of Alaska Fairbanks, Fairbanks, AK, United States
Chairs:  Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States and Douglas H Christensen, University of Alaska Fairbanks, Fairbanks, AK, United States
OSPA Liaison:  Douglas H Christensen, University of Alaska Fairbanks, Fairbanks, AK, United States

Cross-Listed:
  • G - Geodesy
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
7230 Seismicity and tectonics [SEISMOLOGY]
8104 Continental margins: convergent [TECTONOPHYSICS]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Rayleigh-wave Tomography Study of Northwestern Canada (60365)
Morgan Elyse McLellan, University of Ottawa, Ottawa, ON, Canada, Pascal Audet, University of Ottawa, Earth and Environmental Sciences, Ottawa, ON, Canada and Andrew J Schaeffer, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Geologic Traces of a Buried Rupture Earthquake Between the Southern Alaska and Bering Blocks (63922)
Bretwood M Higman, Ground Truth Alaska, Seldovia, United States and Andrew Mattox, Ground Truth Trekking, Seldovia, AK, United States
Repeating Earthquakes on the Queen Charlotte Plate Boundary (67263)
Tim W Hayward and Michael G Bostock, University of British Columbia, Vancouver, BC, Canada
Offshore Tectonics of the St. Elias Mountains: Insights from Ocean Drilling and Seismic Stratigraphy on the Yakutat Shelf (82700)
Lindsay Lowe Worthington, University of New Mexico Main Campus, Department of Earth & Planetary Sciences, Albuquerque, United States, Sean P S Gulick, University of Texas, Institute for Geophysics, Austin, United States, Aleksandr Montelli, University of Texas at Austin, Austin, TX, United States, John M Jaeger, University of Florida, Ft Walton Beach, FL, United States, Sarah Zellers, University of Central Missouri, Physical Sciences, Warrensburg, MO, United States, Maureen H Walczak, The Australian National University, Canberra, Australia and Alan C Mix, Oregon State University, Corvallis, OR, United States
Impact of the Yakutat indentor corner on present-day tectonics and fault activity in SE Alaska – SW Yukon (78409)
Stephane Mazzotti1, Anaïs Marechal1, Jean-Francois Ritz2 and Matthieu Alexis Ferry3, (1)Organization Not Listed, Washington, DC, United States, (2)CNRS, Paris Cedex 16, France, (3)Géosciences Montpellier, Montpellier Cedex 05, France
Revisiting Notable Earthquakes and Seismic Patterns of the Past Decade in Alaska (75674)
Natalia A Ruppert, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Kenneth A Macpherson, Alaska Earthquake Center, Geophysical Institute - UAF, Fairbanks, AK, United States and Stephen G Holtkamp, University of Alaska Fairbanks, Alaska Earthquake Center, Fairbanks, AK, United States
EarthScope’s Transportable Array in Alaska and Western Canada (83750)
Max Enders1, Jeremy Miner2, Ryan M Bierma1 and Robert W Busby2, (1)Incorporated Research Institutions for Seismology, Anchorage, AK, United States, (2)Incorporated Research Institutions for Seismology, Seattle, WA, United States
Numerical Models of Alaskan Tectonics: A Review and Looking Ahead to a New Era of Research (85191)
Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States and Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
Velocity contrast and 10km vertical Moho offset across the Denali fault from double-difference tomography and fault zone head wave analysis (84426)
Amir A Allam, University of Alaska Fairbanks, Fairbanks, United States, Natalia A Ruppert, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Zachary E. Ross, California Institute of Technology, Pasadena, CA, United States and Yehuda Ben-Zion, University of Southern California, Los Angeles, CA, United States
Surface uplift history of southern Alaska: Insight from stable isotopes (76555)
Nicholas Steven Bill1, Peter U Clark1, Hari Mix2, Steven W Hostetler3, Sean Reilly4 and Jeff Benowitz5, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Santa Clara University, Department of Environmental Studies and Sciences, Santa Clara, CA, United States, (3)Oregon State University, US Geological Survey, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (4)Santa Clara University, Santa Clara, CA, United States, (5)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
Hf Isotopes and Geochemical Evidence Constrain the Nature and Sources of Melting During and After Progressive Accretion of the Wrangellia Composite Terrane to the Southern Alaska Margin (77030)
Erin Todd1, James V Jones III1 and Andrew R Kylander-Clark2, (1)USGS Alaska Science Center, Anchorage, AK, United States, (2)University of California Santa Barbara, Earth Science, Santa Barbara, United States

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