Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ...
The isotropic structure of the crust and upper mantle under Antarctica has been constrained by many studies. However, the depth dependence of seismic anisotropy, a powerful tool to characterize deformation and flow, is still poorly known. Here, we modeled three-dimensional (3-D) variations in azimut...
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Online Access: | https://dx.doi.org/10.5281/zenodo.8374544 https://zenodo.org/record/8374544 |
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ftdatacite:10.5281/zenodo.8374544 2023-11-05T03:34:15+01:00 Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... Beghein, Caroline Xu, Haotian 2023 https://dx.doi.org/10.5281/zenodo.8374544 https://zenodo.org/record/8374544 unknown Zenodo https://dx.doi.org/10.5281/zenodo.8346552 Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess Antarctica, seismic anisotropy, seismic tomography, surface waves JournalArticle article-journal ScholarlyArticle 2023 ftdatacite https://doi.org/10.5281/zenodo.837454410.5281/zenodo.8346552 2023-10-09T11:03:55Z The isotropic structure of the crust and upper mantle under Antarctica has been constrained by many studies. However, the depth dependence of seismic anisotropy, a powerful tool to characterize deformation and flow, is still poorly known. Here, we modeled three-dimensional (3-D) variations in azimuthal anisotropy under Antarctica using a multimode Rayleigh waveform fitting technique. We first searched the model space with a reversible-jump Markov Chain Monte Carlo approach to find path-averaged vertically polarized shear wave velocity profiles that fit fundamental and higher mode Rayleigh waveforms. We then inverted them to obtain a 3-D velocity and azimuthal anisotropy model across the region down to 600 km depth. Our results reveal that the east-west dichotomy found in other studies is not only characterized by different wave velocities but also by different anisotropy directions, likely reflecting the different deformation histories of the two blocks. Azimuthal anisotropy was found to be present in the ... : submitted to Seismica ... Article in Journal/Newspaper Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Antarctica, seismic anisotropy, seismic tomography, surface waves |
spellingShingle |
Antarctica, seismic anisotropy, seismic tomography, surface waves Beghein, Caroline Xu, Haotian Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
topic_facet |
Antarctica, seismic anisotropy, seismic tomography, surface waves |
description |
The isotropic structure of the crust and upper mantle under Antarctica has been constrained by many studies. However, the depth dependence of seismic anisotropy, a powerful tool to characterize deformation and flow, is still poorly known. Here, we modeled three-dimensional (3-D) variations in azimuthal anisotropy under Antarctica using a multimode Rayleigh waveform fitting technique. We first searched the model space with a reversible-jump Markov Chain Monte Carlo approach to find path-averaged vertically polarized shear wave velocity profiles that fit fundamental and higher mode Rayleigh waveforms. We then inverted them to obtain a 3-D velocity and azimuthal anisotropy model across the region down to 600 km depth. Our results reveal that the east-west dichotomy found in other studies is not only characterized by different wave velocities but also by different anisotropy directions, likely reflecting the different deformation histories of the two blocks. Azimuthal anisotropy was found to be present in the ... : submitted to Seismica ... |
format |
Article in Journal/Newspaper |
author |
Beghein, Caroline Xu, Haotian |
author_facet |
Beghein, Caroline Xu, Haotian |
author_sort |
Beghein, Caroline |
title |
Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
title_short |
Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
title_full |
Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
title_fullStr |
Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
title_full_unstemmed |
Azimuthal Anisotropy From Multimode Waveform Modeling Reveals Layering Within the Antarctica Craton ... |
title_sort |
azimuthal anisotropy from multimode waveform modeling reveals layering within the antarctica craton ... |
publisher |
Zenodo |
publishDate |
2023 |
url |
https://dx.doi.org/10.5281/zenodo.8374544 https://zenodo.org/record/8374544 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://dx.doi.org/10.5281/zenodo.8346552 |
op_rights |
Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.837454410.5281/zenodo.8346552 |
_version_ |
1781703635015565312 |