An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin
A cratonic embayment that likely formed during the Neoproterozoic rifting of the supercontinent Rodinia is identified under the East Antarctic ice sheet through analyses of aeromagnetic and other geophysical data East Antarctic provinces lay at the heart of both Rodinian and Gondwanan supercontinent...
Published in: | Communications Earth & Environment |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/a91daf8d-50b8-453e-a12e-adcaa5461129 https://doi.org/10.1038/s43247-022-00375-z https://backend.orbit.dtu.dk/ws/files/272812921/s43247_022_00375_z.pdf |
id |
ftdtupubl:oai:pure.atira.dk:publications/a91daf8d-50b8-453e-a12e-adcaa5461129 |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/a91daf8d-50b8-453e-a12e-adcaa5461129 2024-06-23T07:47:51+00:00 An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin Jordan, Tom A. Ferraccioli, Fausto Forsberg, Rene 2022 application/pdf https://orbit.dtu.dk/en/publications/a91daf8d-50b8-453e-a12e-adcaa5461129 https://doi.org/10.1038/s43247-022-00375-z https://backend.orbit.dtu.dk/ws/files/272812921/s43247_022_00375_z.pdf eng eng https://orbit.dtu.dk/en/publications/a91daf8d-50b8-453e-a12e-adcaa5461129 info:eu-repo/semantics/openAccess Jordan , T A , Ferraccioli , F & Forsberg , R 2022 , ' An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin ' , Communications Earth and Environment , vol. 3 , no. 1 , 52 . https://doi.org/10.1038/s43247-022-00375-z article 2022 ftdtupubl https://doi.org/10.1038/s43247-022-00375-z 2024-06-11T15:10:13Z A cratonic embayment that likely formed during the Neoproterozoic rifting of the supercontinent Rodinia is identified under the East Antarctic ice sheet through analyses of aeromagnetic and other geophysical data East Antarctic provinces lay at the heart of both Rodinian and Gondwanan supercontinents, yet poor exposure and limited geophysical data provide few constraints on the region's tectonic evolution. The shape of the Mawson Continent, the stable nucleus of East Antarctica, is one of Antarctica's most important, but contested features, with implications for global plate reconstructions and local tectonic models. Here we show a major marginal embayment 500-700 km wide, cuts into the East Antarctic basement in the South Pole region. This embayment, defined by new aeromagnetic and other geophysical data, truncates the Mawson Continent, which is distinct from basement provinces flanking the Weddell Sea. We favour a late Neoproterozoic rifting model for embayment formation and discuss analogies with other continental margins. The embayment and associated basement provinces help define the East Antarctic nucleus for supercontinental reconstructions, while the inherited marginal geometry likely influenced evolution of the paleo-Pacific margin of Gondwana. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole Weddell Sea Technical University of Denmark: DTU Orbit Antarctic East Antarctic Ice Sheet East Antarctica Pacific South Pole Weddell Weddell Sea Communications Earth & Environment 3 1 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
A cratonic embayment that likely formed during the Neoproterozoic rifting of the supercontinent Rodinia is identified under the East Antarctic ice sheet through analyses of aeromagnetic and other geophysical data East Antarctic provinces lay at the heart of both Rodinian and Gondwanan supercontinents, yet poor exposure and limited geophysical data provide few constraints on the region's tectonic evolution. The shape of the Mawson Continent, the stable nucleus of East Antarctica, is one of Antarctica's most important, but contested features, with implications for global plate reconstructions and local tectonic models. Here we show a major marginal embayment 500-700 km wide, cuts into the East Antarctic basement in the South Pole region. This embayment, defined by new aeromagnetic and other geophysical data, truncates the Mawson Continent, which is distinct from basement provinces flanking the Weddell Sea. We favour a late Neoproterozoic rifting model for embayment formation and discuss analogies with other continental margins. The embayment and associated basement provinces help define the East Antarctic nucleus for supercontinental reconstructions, while the inherited marginal geometry likely influenced evolution of the paleo-Pacific margin of Gondwana. |
format |
Article in Journal/Newspaper |
author |
Jordan, Tom A. Ferraccioli, Fausto Forsberg, Rene |
spellingShingle |
Jordan, Tom A. Ferraccioli, Fausto Forsberg, Rene An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
author_facet |
Jordan, Tom A. Ferraccioli, Fausto Forsberg, Rene |
author_sort |
Jordan, Tom A. |
title |
An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
title_short |
An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
title_full |
An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
title_fullStr |
An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
title_full_unstemmed |
An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin |
title_sort |
embayment in the east antarctic basement constrains the shape of the rodinian continental margin |
publishDate |
2022 |
url |
https://orbit.dtu.dk/en/publications/a91daf8d-50b8-453e-a12e-adcaa5461129 https://doi.org/10.1038/s43247-022-00375-z https://backend.orbit.dtu.dk/ws/files/272812921/s43247_022_00375_z.pdf |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Pacific South Pole Weddell Weddell Sea |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Pacific South Pole Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole Weddell Sea |
op_source |
Jordan , T A , Ferraccioli , F & Forsberg , R 2022 , ' An embayment in the East Antarctic basement constrains the shape of the Rodinian continental margin ' , Communications Earth and Environment , vol. 3 , no. 1 , 52 . https://doi.org/10.1038/s43247-022-00375-z |
op_relation |
https://orbit.dtu.dk/en/publications/a91daf8d-50b8-453e-a12e-adcaa5461129 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s43247-022-00375-z |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1802638063739863040 |