Revised Eocene-Oligocene kinematics for the West Antarctic rift system
Past plate motion between East and West Antarctica along the West Antarctic rift system had important regional and global implications. Although extensively studied, the kinematics of the rift during Eocene-Oligocene time still remains elusive. Based on a recent detailed aeromagnetic survey from the...
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Online Access: | https://doi.org/10.1029/2012GL054181 |
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ftcaltechauth:oai:authors.library.caltech.edu:wk99g-6mm49 2024-09-15T17:40:55+00:00 Revised Eocene-Oligocene kinematics for the West Antarctic rift system Granot, R. Cande, S. C. Stock, J. M. Damaske, D. 2013-01-28 https://doi.org/10.1029/2012GL054181 unknown American Geophysical Union https://doi.org/10.1029/2012GL054181 oai:authors.library.caltech.edu:wk99g-6mm49 eprintid:38544 resolverid:CaltechAUTHORS:20130516-133349919 info:eu-repo/semantics/openAccess Other Geophysical Research Letters, 40(2), 279-284, (2013-01-28) plate kinematics West Antarctic rift system marine magnetics info:eu-repo/semantics/article 2013 ftcaltechauth https://doi.org/10.1029/2012GL054181 2024-08-06T15:35:05Z Past plate motion between East and West Antarctica along the West Antarctic rift system had important regional and global implications. Although extensively studied, the kinematics of the rift during Eocene-Oligocene time still remains elusive. Based on a recent detailed aeromagnetic survey from the Adare and Northern Basins, located in the northwestern Ross Sea, we present the first well-constrained kinematic model with four rotations for Anomalies 12o, 13o, 16y, and 18o (26.5–40.13 Ma). These rotation poles form a cluster suggesting a stable sense of motion during that period of time. The poles are located close to the central part of the rift implying that the local motion varied from extension in the western Ross Sea sector (Adare Basin, Northern Basin, and Victoria Land Basin) to dextral transcurrent motion in the Ross Ice Shelf and to oblique convergence in the eastern end of the rift zone. The results confirm previous estimates of 95 km of extension in the Victoria Land Basin. © 2012 American Geophysical Union. Received 9 October 2012; revised 14 November 2012; accepted 20 November 2012; published 31 January 2013. We would like to thank Graeme Eagles and an anonymous reviewer for their constructive reviews. This study was funded by NSF grants OPP04-40959 (SIO) and OPP04-40923 (Caltech). Published - grl50037.pdf Supplemental Material - 2012GL054181ts01.txt Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Sea Victoria Land West Antarctica Caltech Authors (California Institute of Technology) Geophysical Research Letters 40 2 279 284 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
plate kinematics West Antarctic rift system marine magnetics |
spellingShingle |
plate kinematics West Antarctic rift system marine magnetics Granot, R. Cande, S. C. Stock, J. M. Damaske, D. Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
topic_facet |
plate kinematics West Antarctic rift system marine magnetics |
description |
Past plate motion between East and West Antarctica along the West Antarctic rift system had important regional and global implications. Although extensively studied, the kinematics of the rift during Eocene-Oligocene time still remains elusive. Based on a recent detailed aeromagnetic survey from the Adare and Northern Basins, located in the northwestern Ross Sea, we present the first well-constrained kinematic model with four rotations for Anomalies 12o, 13o, 16y, and 18o (26.5–40.13 Ma). These rotation poles form a cluster suggesting a stable sense of motion during that period of time. The poles are located close to the central part of the rift implying that the local motion varied from extension in the western Ross Sea sector (Adare Basin, Northern Basin, and Victoria Land Basin) to dextral transcurrent motion in the Ross Ice Shelf and to oblique convergence in the eastern end of the rift zone. The results confirm previous estimates of 95 km of extension in the Victoria Land Basin. © 2012 American Geophysical Union. Received 9 October 2012; revised 14 November 2012; accepted 20 November 2012; published 31 January 2013. We would like to thank Graeme Eagles and an anonymous reviewer for their constructive reviews. This study was funded by NSF grants OPP04-40959 (SIO) and OPP04-40923 (Caltech). Published - grl50037.pdf Supplemental Material - 2012GL054181ts01.txt |
format |
Article in Journal/Newspaper |
author |
Granot, R. Cande, S. C. Stock, J. M. Damaske, D. |
author_facet |
Granot, R. Cande, S. C. Stock, J. M. Damaske, D. |
author_sort |
Granot, R. |
title |
Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
title_short |
Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
title_full |
Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
title_fullStr |
Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
title_full_unstemmed |
Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
title_sort |
revised eocene-oligocene kinematics for the west antarctic rift system |
publisher |
American Geophysical Union |
publishDate |
2013 |
url |
https://doi.org/10.1029/2012GL054181 |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Sea Victoria Land West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Sea Victoria Land West Antarctica |
op_source |
Geophysical Research Letters, 40(2), 279-284, (2013-01-28) |
op_relation |
https://doi.org/10.1029/2012GL054181 oai:authors.library.caltech.edu:wk99g-6mm49 eprintid:38544 resolverid:CaltechAUTHORS:20130516-133349919 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/2012GL054181 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
2 |
container_start_page |
279 |
op_container_end_page |
284 |
_version_ |
1810486984357969920 |