T020
The Alaskan and Northern Canadian Cordillera: Geology, Geochemistry, Geophysics, Petrology, and Tectonics

Session ID#: 156562

Session Description:
The Alaskan and northern Canadian Cordillera, stretching from British Columbia and southeast Alaska to the Beaufort, Chukchi, and Bering Seas, is a seismogenic region consisting of accreted terranes and large-offset faults, past and present magmatism, multiple orogenic episodes, and a mantle with an array of inherited structures and striking velocity variations. Several recent studies in the area and the EarthScope Transportable Array have generated new data sets and results and the region has been identified as having world-class science questions to be targeted by future multidisciplinary/multi-sensor arrays (e.g., EON-ROSE). We welcome contributions on the geology, geochemistry, geophysics, petrology, seismology, and tectonics of the region, and encourage reports from the many recent studies as well as integrative summaries of the region. We also welcome contributions on past and recent earthquakes, as the 2020-2021 earthquake sequence along the Alaska subduction zone and the 20th anniversary of the Denali earthquake provide excellent opportunities to investigate earthquakes processes and effects.
Co-Organized:
  • G - Geodesy
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
3640 Igneous petrology [MINERALOGY AND PETROLOGY]
7218 Lithosphere [SEISMOLOGY]
8108 Continental tectonics: compressional [TECTONOPHYSICS]

Primary Convener:  Derek Schutt, Colorado State University, Geosciences, Fort Collins, United States
Conveners:  Julie Elliott, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States and Matthew E Brueseke, Kansas State University, Department of Geology, Manhattan, KS, United States
 
New Insights on the Yakutat slab tear, south central Alaska (USA): Sr-Nd-Pb isotope constraints on the Pleistocene Maclaren River Volcanic Field (1042166)
Alexander T Bearden1, Matthew E Brueseke1, Jeff Benowitz2, Daniel P Miggins3 and Michael Everett Mann4, (1)Kansas State University, Department of Geology, Manhattan, KS, United States, (2)Fairbanks, United States, (3)Oregon State University, Corvallis, OR, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, United States
 
Crustal Thickness Variations in Alaska and Northwestern Canada Revealed by P-wave Receiver Functions (1045631)
Meng Liu, University of Massachusetts Amherst, Amherst, MA, United States and Haiying Gao, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States
 
Mapping Tectonically Active Faults for Geothermal Energy Exploration in the Yukon, Canada (Invited) (1060350)
Theron Finley1, Guy Salomon2, Edwin Nissen1, Roger Stephen3, John Cassidy4 and Brian Menounos5, (1)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, (2)University of Victoria, School of Earth and Ocean Sciences, Victoria, Canada, (3)University of Victoria, Geography, Victoria, BC, Canada, (4)Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada, (5)University of Northern British Columbia, Geography Earth and Environmental Sciences, Prince George, BC, Canada
 
Seismicity Along the Pacific-North America Coast Shear Zone, British Columbia, Canada (1068285)
Geena Littel, University of British Columbia, Vancouver, Canada and Michael G Bostock, University of British Columbia, Vancouver, BC, Canada
 
2D Tomography Across the Queen Charlotte Fault North of Haida Gwaii, British Columbia: Addressing the Question of Pacific Underthrusting (1068765)
Maureen A L Walton1, Lindsay Lowe Worthington2, Emily C Roland3, Lazaro Garza4, Mladen R Nedimovic5 and Benjamin J Phrampus1, (1)US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States, (2)University of New Mexico Main Campus, Department of Earth & Planetary Sciences, Albuquerque, NM, United States, (3)Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, (4)Western Washington University, Geology Department, Bellingham, United States, (5)Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada
 
Strain Partitioning and the Accommodation of Oblique Convergence Along the Northern Queen Charlotte Fault (1070119)
Olumide Adedeji, University of New Mexico - Main Campus, Department of Earth and Planetary Sciences, Albuquerque, NM, United States, Lindsay Lowe Worthington, University of New Mexico, Albuquerque, United States, Emily C Roland, Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, Maureen A L Walton, University of Texas at Austin, Institute for Geophysics, Austin, United States, Mladen R Nedimovic, National Facility for Seismic Imaging (NFSI), Halifax, NS, Canada, Collin Brandl, University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States, Jose Castillo, Dalhousie University, Earth and Environmental Science, Halifax, NS, Canada, Lazaro Garza, Western Washington University, Geology Department, Bellingham, United States, Daniel S Brothers, U.S. Geological Survey, Santa Cruz, CA, United States and Benjamin J Phrampus, US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States
 
Cryosphere Mass Fluctuations and Promotion of Fault Instability in Tectonically Active Southern Alaska. (1082550)
Jeanne M Sauber, NASA Goddard Space Flight Center, Department of Geodesy and Geophysics Laboratory, Greenbelt, MD, United States, Bryant D Loomis, NASA Goddard Space Flight Center, Geodesy and Geophysics Laboratory, Greenbelt, United States, Shin-Chan Han, University of Newcastle, Callaghan, Australia, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Natalia A Ruppert, Univ Alaska Fairbanks, Fairbanks, AK, United States and Chris Rollins, University of Leeds, COMET, School of Earth and Environment, Leeds, United Kingdom
 
Structure of an Active Detachment Under the Kantishna Hills Anticline Near the Denali Fault/Northern Alaska Range Foothills Thrust System From Seismicity and Receiver Function Anisotropy (1089964)
Vera Schulte-Pelkum, University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences and Department of Geological Sciences, Boulder, United States, Natalia A Ruppert, Univ Alaska Fairbanks, Fairbanks, AK, United States and Adrian Bender, USGS Alaska Science Center, Anchorage, AK, United States
 
Insights into Lithospheric Domains and Melt Production Along the Alaskan Subduction Margin from Rayleigh and Shear Wave Velocity Structure (1092229)
Aubreya Nicole Adams1, Cristo Ramirez2, Shane Knopp3, Tom Richards3, Jessica Wen3, Sydney Walters4 and Alexa Trubiano5, (1)Colgate University, Department of Geology, Hamilton, NY, United States, (2)Colgate University, geosciences, Hamilton, United States, (3)Colgate University, Hamilton, United States, (4)Colgate University, Geology, Hamilton, NY, United States, (5)Colgate University, Geology, Hamilton, United States
 
Coseismic Slip Model Evaluation and 3-month Stress Driven Afterslip Simulation of the July 29, 2021 Mw 8.2 Chignik Earthquake. (1093227)
Zechao Zhuo, Michigan State University, East Lansing, MI, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Zhuohui Xiao, School of Geodesy and Geomatics, Wuhan University, Wuhan, China, Julie Elliott, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States and Ronni Grapenthin, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States
 
Crustal Structure of the Semidi Segment in the Alaska Subduction Zone Across the 2021 Mw8.2 Chignik Earthquake Rupture Area Revealed from 2D Wide-Angle Reflection/Refraction Seismic Data (1093323)
Joshua A. Burstein, Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, Donna J Shillington, Northern Arizona University, School of Earth and Sustainability, Flagstaff, United States; Lamont -Doherty Earth Observatory, Palisades, United States, Anne Becel, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Mladen R Nedimovic, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada; Lamont-Doherty Earth Observatory, Palisades, United States
 
Fault Zone Architecture Across the 2013 M7.5 Craig Earthquake Region from P-wave Tomography Using TOQUES Experiment Data (1118596)
Lazaro Garza, Western Washington University, Geology Department, Bellingham, United States, Emily C Roland, Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, Maureen A L Walton, US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States, Lindsay Lowe Worthington, University of New Mexico, Albuquerque, United States, Mladen R Nedimovic, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada, Olumide Adedeji, University of New Mexico - Main Campus, Department of Earth and Planetary Sciences, Albuquerque, NM, United States and Andrew Gase, University of Texas, Institute for Geophysics, Austin, United States
 
Tectonics and structure offshore the Canadian Cordillera: Insights into strain-partitioning along the Queen Charlotte Fault from comprehensive marine seismic imaging (Invited) (1127713)
Lindsay Lowe Worthington, University of New Mexico, Albuquerque, United States, Mladen R Nedimovic, National Facility for Seismic Imaging (NFSI), Halifax, NS, Canada, Emily C Roland, Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, Maureen A L Walton, University of Texas at Austin, Institute for Geophysics, Austin, United States, Collin Brandl, University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States, Olumide Adedeji, University of New Mexico - Main Campus, Department of Earth and Planetary Sciences, Albuquerque, NM, United States, Lazaro Garza, Western Washington University, Geology Department, Bellingham, United States, Jose Castillo, Dalhousie University, Earth and Environmental Science, Halifax, NS, Canada, Benjamin J Phrampus, US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States, Andrew Gase, University of Texas at Austin, UTIG, Austin, United States, Michael G Bostock, University of British Columbia, Vancouver, BC, Canada, Kelin Wang, Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada, Andrew Schaeffer, Sidney Subdivision Natural Resources Canada, Geological Survey of Canada Pacific Division, Sidney, BC, Canada, Tianhaozhe Sun, University of Victoria, Victoria, BC, Canada, Daniel S Brothers, U.S. Geological Survey, Santa Cruz, CA, United States and Nathaniel C Miller, Lamont Doherty Earth Observatory, Palisades, United States
 
Heterogeneous Plate-Bending Earthquake Distribution and Focal Mechanisms Along the Alaska Subduction Zone (1133494)
Patrick Matulka and Douglas Wiens, Washington University in St. Louis, St. Louis, MO, United States
 
Earthquake statistics at the Alaska Peninsula empowered by deep learning (1135095)
Yaqi Jie1,2, Songqiao Shawn Wei2 and Weiqiang Zhu3, (1)Michigan State University, Department of Computational Mathematics, Science and Engineering, East Lansing, MI, United States, (2)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, (3)California Institute of Technology, Seismological Laboratory, Pasadena, United States
 
Segmentation of the Aleutian-Alaska Subduction Zone Revealed by Full-Wave Ambient Noise Tomography with the AACSE Data (1145209)
Vincent Sassard, Purdue University, Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States and Xiaotao Yang, Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States
 
3D traveltime tomography of the Alaska subduction zone through inversion of active source data acquired during the Alaska Amphibious Community Seismic Experiment (AACSE) (1146360)
Tanner Michael Acquisto, Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States, Anne Becel, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Juan Pablo Canales, Woods Hole Oceanographic Inst, Geology and Geophysics, Woods Hole, MA, United States
 
Rayleigh Wave Phase Velocity and Attenuation Tomography of Alaska using the EarthScope Transportable Array (1150417)
Ula Jones, Western Washington University, Bellingham, WA, United States, Colleen A Dalton, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Joshua B Russell, Brown University, Providence, RI, United States
 
New Seismic Reflection Imaging of Crustal Deformation in the Queen Charlotte Terrace, offshore Haida Gwaii, Canada (1152923)
Collin Brandl1, Lindsay Lowe Worthington2, Olumide Adedeji3, Jose Castillo4, Emily C Roland5, Maureen A L Walton6, Mladen R Nedimovic7 and Benjamin J Phrampus6, (1)University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States, (2)University of New Mexico, Albuquerque, United States, (3)University of New Mexico - Main Campus, Department of Earth and Planetary Sciences, Albuquerque, NM, United States, (4)Dalhousie University, Earth and Environmental Science, Halifax, NS, Canada, (5)Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, (6)US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States, (7)Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada
 
New insights on the Denali Volcanic Gap and the shallow crustal structure of South-Central Alaska across the Alaska Range via Bayesian joint inversion of Rayleigh wave ellipticity and phase velocity using a dense nodal array. (1156430)
Santiago Rabade, University of Utah, Department of Geology & Geophysics, Salt Lake City, UT, United States, Fan-Chi Lin, University of Utah, Geology & Geophysics, Salt Lake City, United States, Amir A Allam, University of Utah, Department of Geology & Geophysics, Salt Lake City, United States, Carl Tape, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Kevin Michael Ward, South Dakota School of Mines and Technology, Rapid City, SD, United States and Trevor Waldien, South Dakota School of Mines and Technology, Rapid City, United States
 
Seismic Imaging across the Northern Chukchi Borderland: Implications of the Canada Basin Opening (1156546)
Wisnu Priyanto and Bernard Coakley, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
 
Large Lithospheric Seismic Velocity Variations Across the Northern Canadian Cordillera Imaged by Ambient Noise Tomography (1162982)
Derek Schutt, Colorado State University, Geosciences, Fort Collins, United States, Robert W Porritt, Sandia National Laboratories, Albuquerque, United States, Clément Estève, McGill University, Montreal, QC, Canada, Pascal Audet, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada, Jeremy Gosselin, University of Calgary, Calgary, Canada, Andrew Schaeffer, Sidney Subdivision Natural Resources Canada, Geological Survey of Canada Pacific Division, Sidney, BC, Canada, Richard C Aster, Colorado State University, Geosciences Department, Fort Collins, CO, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States and Joel Frank Cubley, Yukon University, Whitehorse, YT, Canada
 
Did the Megathrust Slip during the 2020 M7.6 Sand Point, Alaska, Strike-Slip Earthquake? (1164313)
Ronni Grapenthin, University of Alaska Fairbanks, Geophysical Institute and Department of Geosciences, Fairbanks, United States, Zhuohui Xiao, School of Geodesy and Geomatics, Wuhan University, Wuhan, China, Julie Elliott, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, Dmitry Nicolsky, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States, Revathy Mozhikunnath Parameswaran, Indian Institute of Science, Centre for Earth Sciences, Bangalore, India, Songqiao Shawn Wei, Washington University in St Louis, St. Louis, United States and Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
 
Subduction fluids control slab slip behaviors and megathrust earthquakes at the Alaska Peninsula (1172151)
Fan Wang, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, Julie Elliott, Michigan State University, Earth and Environmental Sciences, East Lansing, United States, Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Connor Drooff, Michigan State University, East Lansing, MI, United States, Natalia A Ruppert, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States and Haijiang Zhang, University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China
 
Shear Velocity and Vp/Vs Ratio Imaging in Alaska via Jointly Inverting Rayleigh Wave Phase Velocity, Ellipticity and Teleseismic Receiver Functions Using a Bayesian Approach (1172292)
Konstantinos Gkogkas, University of Utah, Department of Geology & Geophysics, Salt Lake City, UT, United States, Fan-Chi Lin, University of Utah, Geology & Geophysics, Salt Lake City, United States, Vera Schulte-Pelkum, Univ Colorado Boulder, Boulder, CO, United States and Amir A Allam, University of Utah, Department of Geology & Geophysics, Salt Lake City, United States
 
Improved Gravity Anomaly Maps for Alaska, Constraint on Regional Faults (1172531)
Bernard Coakley, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
 
Metamorphism, Deformation, and Exhumation of the Blueschist-Greenschist Unit in Seldovia, Alaska (1175033)
Lonnie Justin Hufford1, Whitney M Behr1 and Miguel Cisneros2, (1)ETH Zurich, Structural Geology and Tectonics Group, Geological Institute, Zurich, Switzerland, (2)Lawrence Livermore National Laboratory, Livermore, United States
 
Imaging the Alaskan Lithosphere Based on Full-waveform Joint Inversion of Seismic Ambient Noise and Local Earthquake Data (1176518)
Tianshi Liu, University of Toronto, Department of Earth Sciences, Toronto, ON, Canada, Kai Wang, Nanyang Technological University, School of Physical and Mathematical Sciences, Singapore, Singapore, Carl Tape, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Bin He, The University of Texas at Dallas, Department of Geosciences, Richardson, United States, Yingjie Yang, Macquarie University, ARC Centre of Excellence for Core to Crust Fluid Systems and GEMOC, Sydney, NSW, Australia, Ping Tong, Nanyang Technological University, Asian School of the Environment, Singapore, Singapore and Qinya Liu, University of Toronto, Department of Physics, Toronto, ON, Canada
 
An Updated Geodetic View of Active Tectonics in Interior Alaska (1179839)
Margaret Erichsen, Purdue University, West Lafayette, IN, United States and Julie Elliott, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States
 
Geochemistry of Wrangell Arc Lavas Indicate a Mantle Origin for Voluminous High-Mg# Andesites, With Implications for the Growth of Continental Crust (1181458)
Kelly Brigham, University of Massachusetts Amherst, Amherst, MA, United States, Matthew E Brueseke, Kansas State University, Department of Geology, Manhattan, KS, United States and Stephen Turner, University of Massachusetts, Amherst, United States
 
Geodetic Constraints on Slip Along the Easternmost Alaska Subduction Zone (1182990)
Julie Elliott, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States and Margaret Erichsen, Purdue University, West Lafayette, IN, United States
 
A Corrected Local Geodetic Velocity Field for Northern Cordillera (1184994)
Connor Drooff, Michigan State University, East Lansing, MI, United States and Jeffrey Todd Freymueller, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
 
Crustal structure crossing the Queen Charlotte Fault and Trough in the region of the Haida Gwaii 2012 M7.9 Thrust Earthquake using P-wave tomography (1192341)
Emily C Roland, Western Washington University, Geology Department and Marine and Coastal Sciences Program, Bellingham, WA, United States, Lindsay Lowe Worthington, University of New Mexico, Albuquerque, United States, Maureen A L Walton, University of Texas at Austin, Institute for Geophysics, Austin, United States, Mladen R Nedimovic, National Facility for Seismic Imaging (NFSI), Halifax, NS, Canada, Lazaro Garza, Western Washington University, Geology Department, Bellingham, United States and Collin Brandl, University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States
 
The regional structure of the Alaskan Mantle: a full waveform inversion approach (1201197)
Daniel Andrew Frost, Berkeley Seismological Lab, Berkeley, CA, United States, Sevan Adourian, University of California Berkeley, Earth and Planetary Science, Berkeley, United States and Barbara Romanowicz, Collège de France, IPGP, UNIVERSITY OF BERKELEY, Paris, France
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