New continental margin magnetic anomalies off East Antarctica
Over the past decade, Australian, Norwegian and Russian marine surveys have collected integrated seismic, gravity and magnetic data in the southern Indian Ocean. The more than 350,000 line-km of new airborne and marine magnetic observations for the East Antarctic continental margin have been compile...
Published in: | Tectonophysics |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
ELSEVIER SCIENCE BV
2013
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/31283/ https://hdl.handle.net/10013/epic.40752 |
id |
ftawi:oai:epic.awi.de:31283 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:31283 2023-05-15T13:46:52+02:00 New continental margin magnetic anomalies off East Antarctica Golynsky, A. V. ivanov, S.V. Kazankov, A.J. Jokat, Wilfried Masolov, V. N. von Frese, R. ADMAP Working, Group 2013-02-05 https://epic.awi.de/id/eprint/31283/ https://hdl.handle.net/10013/epic.40752 unknown ELSEVIER SCIENCE BV Golynsky, A. V. , ivanov, S. , Kazankov, A. , Jokat, W. orcid:0000-0002-7793-5854 , Masolov, V. N. , von Frese, R. and ADMAP Working, G. (2013) New continental margin magnetic anomalies off East Antarctica , Tectonophysics, 585 , pp. 172-184 . doi:10.1016/j.tecto.2012.06.043 <https://doi.org/10.1016/j.tecto.2012.06.043> , hdl:10013/epic.40752 EPIC3Tectonophysics, ELSEVIER SCIENCE BV, 585, pp. 172-184, ISSN: 0040-1951 Article isiRev 2013 ftawi https://doi.org/10.1016/j.tecto.2012.06.043 2021-12-24T15:38:00Z Over the past decade, Australian, Norwegian and Russian marine surveys have collected integrated seismic, gravity and magnetic data in the southern Indian Ocean. The more than 350,000 line-km of new airborne and marine magnetic observations for the East Antarctic continental margin have been compiled into an improved definition of crustal magnetic anomaly patterns. This compilation provides important new constraints on the breakup processes and igneous activity related to the formation of the passive margin of East Antarctica. The eastern sector of the map from Bruce Rise in the west to the D'Urville Sea in the east is largely dominated by seafloor spreading magnetic anomalies. The ‘Adélie Rift Block’ of highly stretched and extensively faulted continental crust is associated with a smooth anomaly fabric. Abrupt magnetic anomaly changes along the oceanic-continent transition in the Cooperation Sea including the Enderby Basin Anomaly extend for more than 1680 km from the Kerguelen Plateau towards the Cosmonaut Sea. Three sectors of the East Antarctic continental margin exhibit pronounced disparities in the anomaly patterns that strongly suggest different modes of seafloor formation. Strong positive seafloor magnetic anomalies mark the southern margin of the Kerguelen Plateau, the Maud Rise and adjacent areas in the Riiser-Larsen Sea. The new compilation suggests that at least 300 km of the Enderby Basin and Shackleton Basin may be part of the Cretaceous Kerguelen Volcanic Province and possibly maps an abandoned ‘fossil’ spreading center in the central Enderby Basin. The majority of the published age models for the Enderby Basin and “Australian sector” of the East Antarctic margin are not in agreement with the structural grain of magnetic anomalies in the newly compiled map. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cooperation Sea Cosmonaut sea D'Urville Sea East Antarctica Riiser-Larsen Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic East Antarctica Kerguelen Shackleton Indian Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Riiser-Larsen Sea ENVELOPE(24.000,24.000,-68.000,-68.000) D'Urville Sea ENVELOPE(140.000,140.000,-65.000,-65.000) Cooperation Sea ENVELOPE(70.000,70.000,-67.000,-67.000) Bruce Rise ENVELOPE(101.250,101.250,-63.500,-63.500) Tectonophysics 585 172 184 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Over the past decade, Australian, Norwegian and Russian marine surveys have collected integrated seismic, gravity and magnetic data in the southern Indian Ocean. The more than 350,000 line-km of new airborne and marine magnetic observations for the East Antarctic continental margin have been compiled into an improved definition of crustal magnetic anomaly patterns. This compilation provides important new constraints on the breakup processes and igneous activity related to the formation of the passive margin of East Antarctica. The eastern sector of the map from Bruce Rise in the west to the D'Urville Sea in the east is largely dominated by seafloor spreading magnetic anomalies. The ‘Adélie Rift Block’ of highly stretched and extensively faulted continental crust is associated with a smooth anomaly fabric. Abrupt magnetic anomaly changes along the oceanic-continent transition in the Cooperation Sea including the Enderby Basin Anomaly extend for more than 1680 km from the Kerguelen Plateau towards the Cosmonaut Sea. Three sectors of the East Antarctic continental margin exhibit pronounced disparities in the anomaly patterns that strongly suggest different modes of seafloor formation. Strong positive seafloor magnetic anomalies mark the southern margin of the Kerguelen Plateau, the Maud Rise and adjacent areas in the Riiser-Larsen Sea. The new compilation suggests that at least 300 km of the Enderby Basin and Shackleton Basin may be part of the Cretaceous Kerguelen Volcanic Province and possibly maps an abandoned ‘fossil’ spreading center in the central Enderby Basin. The majority of the published age models for the Enderby Basin and “Australian sector” of the East Antarctic margin are not in agreement with the structural grain of magnetic anomalies in the newly compiled map. |
format |
Article in Journal/Newspaper |
author |
Golynsky, A. V. ivanov, S.V. Kazankov, A.J. Jokat, Wilfried Masolov, V. N. von Frese, R. ADMAP Working, Group |
spellingShingle |
Golynsky, A. V. ivanov, S.V. Kazankov, A.J. Jokat, Wilfried Masolov, V. N. von Frese, R. ADMAP Working, Group New continental margin magnetic anomalies off East Antarctica |
author_facet |
Golynsky, A. V. ivanov, S.V. Kazankov, A.J. Jokat, Wilfried Masolov, V. N. von Frese, R. ADMAP Working, Group |
author_sort |
Golynsky, A. V. |
title |
New continental margin magnetic anomalies off East Antarctica |
title_short |
New continental margin magnetic anomalies off East Antarctica |
title_full |
New continental margin magnetic anomalies off East Antarctica |
title_fullStr |
New continental margin magnetic anomalies off East Antarctica |
title_full_unstemmed |
New continental margin magnetic anomalies off East Antarctica |
title_sort |
new continental margin magnetic anomalies off east antarctica |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/31283/ https://hdl.handle.net/10013/epic.40752 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(24.000,24.000,-68.000,-68.000) ENVELOPE(140.000,140.000,-65.000,-65.000) ENVELOPE(70.000,70.000,-67.000,-67.000) ENVELOPE(101.250,101.250,-63.500,-63.500) |
geographic |
Antarctic East Antarctica Kerguelen Shackleton Indian Maud Rise Riiser-Larsen Riiser-Larsen Sea D'Urville Sea Cooperation Sea Bruce Rise |
geographic_facet |
Antarctic East Antarctica Kerguelen Shackleton Indian Maud Rise Riiser-Larsen Riiser-Larsen Sea D'Urville Sea Cooperation Sea Bruce Rise |
genre |
Antarc* Antarctic Antarctica Cooperation Sea Cosmonaut sea D'Urville Sea East Antarctica Riiser-Larsen Sea |
genre_facet |
Antarc* Antarctic Antarctica Cooperation Sea Cosmonaut sea D'Urville Sea East Antarctica Riiser-Larsen Sea |
op_source |
EPIC3Tectonophysics, ELSEVIER SCIENCE BV, 585, pp. 172-184, ISSN: 0040-1951 |
op_relation |
Golynsky, A. V. , ivanov, S. , Kazankov, A. , Jokat, W. orcid:0000-0002-7793-5854 , Masolov, V. N. , von Frese, R. and ADMAP Working, G. (2013) New continental margin magnetic anomalies off East Antarctica , Tectonophysics, 585 , pp. 172-184 . doi:10.1016/j.tecto.2012.06.043 <https://doi.org/10.1016/j.tecto.2012.06.043> , hdl:10013/epic.40752 |
op_doi |
https://doi.org/10.1016/j.tecto.2012.06.043 |
container_title |
Tectonophysics |
container_volume |
585 |
container_start_page |
172 |
op_container_end_page |
184 |
_version_ |
1766245478284918784 |