Tectonics and Seismic Structure of Alaska and Northwestern Canada

Auteur

Natalia A. Ruppert, PhD, is a Senior Scientist at the Alaska Earthquake Center at University of Alaska Fairbanks.

Margarete A. Jadamec, PhD, is an Associate Professor in the Department of Geology and in the Institute for Artificial Intelligence and Data Science at the University of Buffalo.

Jeffrey Freymueller, PhD, is the Endowed Chair for Geology of the Solid Earth at Michigan State University.

Texte du rabat

New insights into geologic and tectonic processes in Alaska and northwestern Canada The northwest of the North American continent is geologically dynamic and tectonically active. A network of seismic and geodetic instruments deployed across the region as part of the EarthScope project provided data crucial to understanding its geological, tectonic, and seismic processes. Tectonics and Seismic Structure of Alaska and Northwestern Canada: EarthScope and Beyond presents review papers and new scientific studies using EarthScope data to advance understanding of the region's structure, seismic activity, and geodynamic processes. About this volume: Describes the infrastructure and capabilities of the EarthScope seismic and geodetic networksDraws from a comprehensive set of geophysical dataIncludes field studies, laboratory analyses, and numerical modelingSpans processes from the Earth's interior and the lower mantle to the crust and surfaceCovers examples from subduction zones, fault systems, and some of the largest recorded earthquakesProvides scientific explanations for the natural landscapes and ongoing movements shaping northwest of the North American continent The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.

Contenu

Part I: An Introduction to the EarthScope Networks

1. EarthScope Networks in Alaska

2. Perspectives on Transportable Array Alaska Background Noise Levels

Part II Synthesis Studies of Alaska and Northwestern Canada: From the Crust to the Lower Mantle

3. A Decade of Alaska Seismicity: 2013-2022

4. Updating the Crustal Fault Model for the 2023 National Seismic Hazard Model for Alaska

5. Geodetic Observations of Tectonic Deformation in Alaska and western Canada: The EarthScope Revolution

6. Synthesis of the Seismic Structure of the Greater Alaska Region: Continental Lithosphere

7. Structure, origin, and deformation of the lithosphere in the northern Canadian Cordillera from high-resolution, passive-source seismic velocity models

8. Synthesis of the Seismic Structure of the Greater Alaska Region: Subducting Slab Geometry

9. Synthesis of the Seismic Structure of the Greater Alaska Region: Geodynamic Implications

Part III Aleutian-Alaska Subduction: Properties, Interface Structure, and Dynamics

10. An Alaska-Aleutian subduction zone interface earthquake recurrence model from geology and Geodesy

11. Tectonic Tremor Observations Across Alaska

12. Insights into Inherited Crustal Features and Southern Alaska Tectonic History from Sp Receiver Functions

13. Implications of plateau buoyancy versus variable plate coupling on flat slab subduction in Alaska

14. Constraining the earthquake recording threshold of intraslab earthquakes with turbidites in southcentral Alaskäs lakes and fjords

15. Variations in Reflection Signature and Slip Behavior of the Subduction Interface Offshore Alaska Peninsula From 152 deg to 161 deg W

16. Implications of the 2020-2021 Earthquakes for Megathrust Coupling and Seismicity in the Vicinity of the Shumagin Gap

Part IV Transform and Oblique Fault Systems: From the Plate Boundary Corner to the Northeastern Brooks Range

17. Oblique contraction along the fastest ocean-continent transform plate boundary focuses rock uplift west of the Fairweather fault, southeast Alaska

18. Slip Redistribution onto the Totschunda Fault of Southern Alaska-a Result of a Pacific Plate Motion Change at ca. 6 Ma

19. Inherited Upper-plate Controls on Localized Arc Magmatism Since ca. 100 Ma along the Alaska Range Suture Zone

20. Geologic evolution of the Denali fault system and associated crustal structure

21. Seismicity and Anisotropic Imaging Reveal an Active Detachment Beneath the Northern Alaska Range Foothills

22. The 2018 Kaktovik, Alaska earthquakes and their context: insights from seismotectonics, In SAR geodesy, and static stress changes