Seismic anisotropy beneath east Greenland revealed by shear wave splitting.
Seismic anisotropy was investigated by measuring shear wave splitting at 7 broadband stations in eastern Greenland. Splitting parameters (fast polarization and time delay) were determined for SKS and SKKS phases. Fast polarizations are oriented roughly parallel to the east Greenland coast at 5 stati...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:1858 2023-05-15T16:03:34+02:00 Seismic anisotropy beneath east Greenland revealed by shear wave splitting. Ucisik, N. Gudmundsson, O. Priestley, K. F. Larsen, T. B. 2005 application/pdf http://eprints.esc.cam.ac.uk/1858/ http://eprints.esc.cam.ac.uk/1858/1/Seismic_anisotropy_-_Priestley.pdf https://doi.org/10.1029/2004GL021875 en eng http://eprints.esc.cam.ac.uk/1858/1/Seismic_anisotropy_-_Priestley.pdf Ucisik, N. and Gudmundsson, O. and Priestley, K. F. and Larsen, T. B. (2005) Seismic anisotropy beneath east Greenland revealed by shear wave splitting. Geophysical Research Letters, 32 (8). L08315; doi.org/10.1029/2004GL021875. DOI https://doi.org/10.1029/2004GL021875 <https://doi.org/10.1029/2004GL021875> 02 - Geodynamics Geophysics and Tectonics Article PeerReviewed 2005 ftucambridgeesc https://doi.org/10.1029/2004GL021875 2020-08-27T18:09:03Z Seismic anisotropy was investigated by measuring shear wave splitting at 7 broadband stations in eastern Greenland. Splitting parameters (fast polarization and time delay) were determined for SKS and SKKS phases. Fast polarizations are oriented roughly parallel to the east Greenland coast at 5 stations, while for two they are nearly perpendicular to the coast. The anisotropy at 5 is unrelated to the spreading direction of the North Atlantic or absolute plate motion. The fast polarization direction can be related to tectonic fabric in the Caledonides in the north, suggesting that anisotropy is frozen in the lithosphere, deformed coherently with depth. Another explanation of the coast parallel fast polarization is asthenospheric flow along the Mid-Atlantic Ridge at the time of opening of the ocean inducing fabric in the thickened lithosphere. The time delays (0.5–1.3 s) do, however, require that fabric to be strong or distributed over a substantial depth range. Article in Journal/Newspaper East Greenland Greenland North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications Greenland Mid-Atlantic Ridge Geophysical Research Letters 32 8 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
02 - Geodynamics Geophysics and Tectonics |
spellingShingle |
02 - Geodynamics Geophysics and Tectonics Ucisik, N. Gudmundsson, O. Priestley, K. F. Larsen, T. B. Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
topic_facet |
02 - Geodynamics Geophysics and Tectonics |
description |
Seismic anisotropy was investigated by measuring shear wave splitting at 7 broadband stations in eastern Greenland. Splitting parameters (fast polarization and time delay) were determined for SKS and SKKS phases. Fast polarizations are oriented roughly parallel to the east Greenland coast at 5 stations, while for two they are nearly perpendicular to the coast. The anisotropy at 5 is unrelated to the spreading direction of the North Atlantic or absolute plate motion. The fast polarization direction can be related to tectonic fabric in the Caledonides in the north, suggesting that anisotropy is frozen in the lithosphere, deformed coherently with depth. Another explanation of the coast parallel fast polarization is asthenospheric flow along the Mid-Atlantic Ridge at the time of opening of the ocean inducing fabric in the thickened lithosphere. The time delays (0.5–1.3 s) do, however, require that fabric to be strong or distributed over a substantial depth range. |
format |
Article in Journal/Newspaper |
author |
Ucisik, N. Gudmundsson, O. Priestley, K. F. Larsen, T. B. |
author_facet |
Ucisik, N. Gudmundsson, O. Priestley, K. F. Larsen, T. B. |
author_sort |
Ucisik, N. |
title |
Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
title_short |
Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
title_full |
Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
title_fullStr |
Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
title_full_unstemmed |
Seismic anisotropy beneath east Greenland revealed by shear wave splitting. |
title_sort |
seismic anisotropy beneath east greenland revealed by shear wave splitting. |
publishDate |
2005 |
url |
http://eprints.esc.cam.ac.uk/1858/ http://eprints.esc.cam.ac.uk/1858/1/Seismic_anisotropy_-_Priestley.pdf https://doi.org/10.1029/2004GL021875 |
geographic |
Greenland Mid-Atlantic Ridge |
geographic_facet |
Greenland Mid-Atlantic Ridge |
genre |
East Greenland Greenland North Atlantic |
genre_facet |
East Greenland Greenland North Atlantic |
op_relation |
http://eprints.esc.cam.ac.uk/1858/1/Seismic_anisotropy_-_Priestley.pdf Ucisik, N. and Gudmundsson, O. and Priestley, K. F. and Larsen, T. B. (2005) Seismic anisotropy beneath east Greenland revealed by shear wave splitting. Geophysical Research Letters, 32 (8). L08315; doi.org/10.1029/2004GL021875. DOI https://doi.org/10.1029/2004GL021875 <https://doi.org/10.1029/2004GL021875> |
op_doi |
https://doi.org/10.1029/2004GL021875 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
8 |
_version_ |
1766399255088463872 |