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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American Geophysical Union
2013
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ftcaltechauth:oai:authors.library.caltech.edu:38544 2023-05-15T14:04:55+02:00 Revised Eocene-Oligocene kinematics for the West Antarctic rift system Granot, R. Cande, S. C. Stock, J. M. Damaske, D. 2013-01-28 application/pdf text/plain https://authors.library.caltech.edu/38544/ https://authors.library.caltech.edu/38544/1/grl50037.pdf https://authors.library.caltech.edu/38544/7/2012GL054181ts01.txt https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919 en eng American Geophysical Union https://authors.library.caltech.edu/38544/1/grl50037.pdf https://authors.library.caltech.edu/38544/7/2012GL054181ts01.txt Granot, R. and Cande, S. C. and Stock, J. M. and Damaske, D. (2013) Revised Eocene-Oligocene kinematics for the West Antarctic rift system. Geophysical Research Letters, 40 (2). pp. 279-284. ISSN 0094-8276. doi:10.1029/2012GL054181. https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919 <https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919> other Article PeerReviewed 2013 ftcaltechauth https://doi.org/10.1029/2012GL054181 2021-11-11T18:53:50Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Sea Victoria Land West Antarctica Caltech Authors (California Institute of Technology) Adare ENVELOPE(170.233,170.233,-71.283,-71.283) Adare Basin ENVELOPE(175.000,175.000,-71.000,-71.000) Antarctic Ross Ice Shelf Ross Sea Victoria Land West Antarctica Geophysical Research Letters 40 2 279 284 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Granot, R. Cande, S. C. Stock, J. M. Damaske, D. |
spellingShingle |
Granot, R. Cande, S. C. Stock, J. M. Damaske, D. Revised Eocene-Oligocene kinematics for the West Antarctic rift system |
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://authors.library.caltech.edu/38544/ https://authors.library.caltech.edu/38544/1/grl50037.pdf https://authors.library.caltech.edu/38544/7/2012GL054181ts01.txt https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919 |
long_lat |
ENVELOPE(170.233,170.233,-71.283,-71.283) ENVELOPE(175.000,175.000,-71.000,-71.000) |
geographic |
Adare Adare Basin Antarctic Ross Ice Shelf Ross Sea Victoria Land West Antarctica |
geographic_facet |
Adare Adare Basin Antarctic Ross Ice Shelf Ross Sea Victoria Land West Antarctica |
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_relation |
https://authors.library.caltech.edu/38544/1/grl50037.pdf https://authors.library.caltech.edu/38544/7/2012GL054181ts01.txt Granot, R. and Cande, S. C. and Stock, J. M. and Damaske, D. (2013) Revised Eocene-Oligocene kinematics for the West Antarctic rift system. Geophysical Research Letters, 40 (2). pp. 279-284. ISSN 0094-8276. doi:10.1029/2012GL054181. https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919 <https://resolver.caltech.edu/CaltechAUTHORS:20130516-133349919> |
op_rights |
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_ |
1766276367699148800 |