Late Cenozoic unification of East and West Antarctica
The kinematic evolution of the West Antarctic rift system has important consequences for regional and global geodynamics. However, due to the lack of Neogene seafloor spreading at the plate boundary and despite being poorly resolved, East-West Antarctic motion was assumed to have ended abruptly at 2...
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2018
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ftarchimer:oai:archimer.ifremer.fr:80081 2023-05-15T13:47:37+02:00 Late Cenozoic unification of East and West Antarctica Granot, Roi Dyment, Jerome 2018-08 application/pdf https://archimer.ifremer.fr/doc/00689/80081/83110.pdf https://archimer.ifremer.fr/doc/00689/80081/83111.pdf https://archimer.ifremer.fr/doc/00689/80081/83112.pdf https://doi.org/10.1038/s41467-018-05270-w https://archimer.ifremer.fr/doc/00689/80081/ eng eng Nature Publishing Group https://archimer.ifremer.fr/doc/00689/80081/83110.pdf https://archimer.ifremer.fr/doc/00689/80081/83111.pdf https://archimer.ifremer.fr/doc/00689/80081/83112.pdf doi:10.1038/s41467-018-05270-w https://archimer.ifremer.fr/doc/00689/80081/ info:eu-repo/semantics/openAccess restricted use Nature Communications (2041-1723) (Nature Publishing Group), 2018-08 , Vol. 9 , N. 3189 , P. 10p. text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1038/s41467-018-05270-w 2021-09-23T20:37:31Z The kinematic evolution of the West Antarctic rift system has important consequences for regional and global geodynamics. However, due to the lack of Neogene seafloor spreading at the plate boundary and despite being poorly resolved, East-West Antarctic motion was assumed to have ended abruptly at 26 million years ago. Here we present marine magnetic data collected near the northern edge of the rift system showing that motion between East and West Antarctica lasted until the middle Neogene (similar to 11 million years ago), long after the cessation of the known mid-Cenozoic pulse of motion. We calculate new rotation parameters for the early Neogene that provide the kinematic framework to understand the varied lithospheric settings of the Transantarctic Mountains and the tectono-volcanic activity within the rift. Incorporation of the Antarctic plate motion into the global plate circuit has major implications for the predicted Neogene motion of the Pacific Plate relative to the rest of the plates. Article in Journal/Newspaper Antarc* Antarctic Antarctica West Antarctica Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Pacific The Antarctic Transantarctic Mountains West Antarctica Nature Communications 9 1 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The kinematic evolution of the West Antarctic rift system has important consequences for regional and global geodynamics. However, due to the lack of Neogene seafloor spreading at the plate boundary and despite being poorly resolved, East-West Antarctic motion was assumed to have ended abruptly at 26 million years ago. Here we present marine magnetic data collected near the northern edge of the rift system showing that motion between East and West Antarctica lasted until the middle Neogene (similar to 11 million years ago), long after the cessation of the known mid-Cenozoic pulse of motion. We calculate new rotation parameters for the early Neogene that provide the kinematic framework to understand the varied lithospheric settings of the Transantarctic Mountains and the tectono-volcanic activity within the rift. Incorporation of the Antarctic plate motion into the global plate circuit has major implications for the predicted Neogene motion of the Pacific Plate relative to the rest of the plates. |
format |
Article in Journal/Newspaper |
author |
Granot, Roi Dyment, Jerome |
spellingShingle |
Granot, Roi Dyment, Jerome Late Cenozoic unification of East and West Antarctica |
author_facet |
Granot, Roi Dyment, Jerome |
author_sort |
Granot, Roi |
title |
Late Cenozoic unification of East and West Antarctica |
title_short |
Late Cenozoic unification of East and West Antarctica |
title_full |
Late Cenozoic unification of East and West Antarctica |
title_fullStr |
Late Cenozoic unification of East and West Antarctica |
title_full_unstemmed |
Late Cenozoic unification of East and West Antarctica |
title_sort |
late cenozoic unification of east and west antarctica |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00689/80081/83110.pdf https://archimer.ifremer.fr/doc/00689/80081/83111.pdf https://archimer.ifremer.fr/doc/00689/80081/83112.pdf https://doi.org/10.1038/s41467-018-05270-w https://archimer.ifremer.fr/doc/00689/80081/ |
geographic |
Antarctic Pacific The Antarctic Transantarctic Mountains West Antarctica |
geographic_facet |
Antarctic Pacific The Antarctic Transantarctic Mountains West Antarctica |
genre |
Antarc* Antarctic Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica West Antarctica |
op_source |
Nature Communications (2041-1723) (Nature Publishing Group), 2018-08 , Vol. 9 , N. 3189 , P. 10p. |
op_relation |
https://archimer.ifremer.fr/doc/00689/80081/83110.pdf https://archimer.ifremer.fr/doc/00689/80081/83111.pdf https://archimer.ifremer.fr/doc/00689/80081/83112.pdf doi:10.1038/s41467-018-05270-w https://archimer.ifremer.fr/doc/00689/80081/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41467-018-05270-w |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766247524886118400 |