Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 179.
This multidisciplinary monograph provides the first modern integrative summary focused on the most spectacular active tectonic systems in North America.
Encompassing seismology, tectonics, geology, and geodesy, it includes papers that summarize the state of knowledge, including background material for those unfamiliar with the region; address global hypotheses using data from Alaska; and test important global hypotheses using data from this region.
It is organized around four major themes:
- subduction and great earthquakes at the Aleutian Arc,
- the transition from strike slip to accretion and subduction of the Yakutat microplate,
- the Denali fault and related structures and their role in accommodating permanent deformation of the overriding plate, and
- regional integration and large–scale models and the use of data from Alaska to address important global questions and hypotheses.
The book′s publication near the beginning of the National Science Foundation′s EarthScope project makes it especially timely because Alaska is perhaps the least understood area within the EarthScope footprint, and interest in the region can be expected to rise with time as more EarthScope data become available.
PrefaceJeffrey T. Freymueller, Peter J. Haeussler, Rob Wesson, and Göran Ekström vii
Section I: Overviews
Active Deformation Processes in Alaska, Based on 15 Years of GPS MeasurementsJeffrey T. Freymueller, Hilary Woodard, Steven C. Cohen, Ryan Cross, Julie Elliott, Christopher F. Larsen, Sigrún Hreinsdóttir, and Chris Zweck 1Paleoseismicity and Neotectonics of the Aleutian Subduction Zone An OverviewGary Carver and George Plafker 43
Neotectonics of the Yakutat Collision: Changes in Deformation Driven by Mass RedistributionJames B. Chapman, Terry L. Pavlis, Sean Gulick, Aaron Berger, Lindsay Lowe, James Spotila, Ronald Bruhn, Michael Vorkink, Peter Koons, Adam Barker, Carlos Picornell, Ken Ridgway, Bernard Hallet, John Jaeger, and James McCalpin 65
An Overview of the Neotectonics of Interior Alaska: Far–Field Deformation From the Yakutat
Microplate CollisionPeter J. Haeussler 83
Active Tectonics of Interior Alaska: Seismicity, GPS Geodesy, and Local GeomorphologyNatalia A. Ruppert, Kenneth D. Ridgway, Jeffrey T. Freymueller, Ryan S. Cross, and Roger A. Hansen 109
Section II: The Alaska–Aleutian Subduction Zone
New Paleomagnetic Data From the Central Aleutian Arc: Evidence and Implications for Block RotationsLena Krutikov, David B. Stone, and Pavel Minyuk 135Exhumation in the Chugach–Kenai Mountain Belt Above the Aleutian Subduction Zone, Southern AlaskaJamie T. Buscher, Aaron L. Berger, and James A. Spotila 151
Active Faults on Northeastern Kodiak Island, AlaskaG. Carver, J. Sauber, W. Lettis, R. Witter, and B. Whitney 167
Paleoseismological Records of Multiple Great Earthquakes in Southcentral Alaska: A 4000–Year Record at GirdwoodIan Shennan, Natasha Barlow, and Rod Combellick 185
Seismicity of the Prince William Sound Region and Its Relation to Plate Structure and the
1964 Great Alaska EarthquakeDiane I. Doser, Alejandro de la Peña, and Annette M. Veilleux 201
Section III: The Yakutat Collision Between the Subduction and Transform Boundaries
Geological and Geophysical Evaluation of the Mechanisms of the Great 1899 Yakutat Bay EarthquakesGeorge Plafker and Wayne Thatcher 215
Yakataga Fold–and–Thrust Belt: Structural Geometry and Tectonic Implications of a Small Continental Collision ZoneWesley K. Wallace 237
Identifying Active Structures in the Kayak Island and Pamplona Zones: Implications for Offshore Tectonics of the Yakutat Microplate, Gulf of AlaskaLindsay L. Worthington, Sean P. S. Gulick, and Terry L. Pavlis 257
Section IV: Deformation Inboard of the Plate Boundary
Neogene Exhumation of the Tordrillo Mountains, Alaska, and Correlations With Denali (Mount McKinley)Peter J. Haeussler, Paul O Sullivan, Aaron L. Berger, and James A. Spotila 269
Does a Boundary of the Wrangell Block Extend Through Southern Cook Inlet and Shelikof Strait, Alaska?Michael A. Fisher, Ray W. Sliter, and Florence L. Wong 287
Section V: Integrative Models, Stress Transfer, and Seismic Hazards
Tectonics, Dynamics, and Seismic Hazard in the Canada Alaska CordilleraStephane Mazzotti, Lucinda J. Leonard, Roy D. Hyndman, and John F. Cassidy 297
Contemporary Fault Mechanics in Southern AlaskaJames L. Kalbas, Andrew M. Freed, and Kenneth D. Ridgway 321
Orogenesis From Subducting Thick Crust and Evidence From AlaskaGeoffrey A. Abers 337
Stress Map for Alaska From Earthquake Focal MechanismsNatalia A. Ruppert 351
Rapid Ice Mass Loss: Does It Have an Influence on Earthquake Occurrence in Southern Alaska?Jeanne M. Sauber and Natalia A. Ruppert 369
Challenges in Making a Seismic Hazard Map for Alaska and the AleutiansRobert L. Wesson, Oliver S. Boyd, Charles S. Mueller, and Arthur D. Frankel 385
Toward a Time–Dependent Probabilistic Seismic Hazard Analysis for AlaskaOliver S. Boyd, Yuehua Zeng, Charles G. Bufe, Robert L. Wesson, Fred Pollitz, and Jeanne L. Hardebeck 399
Fault Interaction in Alaska: Static Coulomb Stress TransferCharles G. Bufe and Oliver S. Boy 417