Seismic Imaging of the Westward Transition From Yakutat to Pacific Subduction in Southern Alaska

International audience • We apply a multi-mode 3D Kirchhoff migration to a new composite seismic data set from six arrays deployed in Alaska from 2000 to 2018 • We observe a sharp lateral boundary in the slab structure with a 10 km Moho step just offshore Anchorage from the Pacific to the Yakutat sl...

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Bibliographic Details
Published in:Geochemistry, Geophysics, Geosystems
Main Authors: Millet, Florian, Rondenay, Stéphane, Bodin, Thomas, Tape, Carl
Other Authors: Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2023
Subjects:
[PHYS]Physics [physics]
Yakutat
Alaska
Online Access:https://cnrs.hal.science/hal-04313023
https://cnrs.hal.science/hal-04313023/document
https://cnrs.hal.science/hal-04313023/file/Geochem%20Geophys%20Geosyst%20-%202023%20-%20Millet%20-%20Seismic%20Imaging%20of%20the%20Westward%20Transition%20From%20Yakutat%20to%20Pacific%20Subduction%20in.pdf
https://doi.org/10.1029/2022gc010374
Description
Summary:International audience • We apply a multi-mode 3D Kirchhoff migration to a new composite seismic data set from six arrays deployed in Alaska from 2000 to 2018 • We observe a sharp lateral boundary in the slab structure with a 10 km Moho step just offshore Anchorage from the Pacific to the Yakutat slab • Our observations suggest that the crust is still partially uneclogitized down to 150 km depth in both slabs

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