The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica
A study of the bathymetric and linear magnetic anomalies between Dronning Maud Land, Antarctica and the South West Indian Ridge (SWIR) revealed a Mesozoic sequence of linear magnetic anomalies, M0 to M12 (108-126 Ma), a fracture zone offset (is approx. equal to 130 km), and the Cretaceous magnetic q...
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ftnio:oai:dsr.nio.org:2264/3023 2023-05-15T13:59:28+02:00 The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica Rao, D.G. Chaubey, A.K. Ramprasad, T. 1992 http://drs.nio.org/drs/handle/2264/3023 en eng Elsevier Copyright [1992]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository. bathymetry magnetic anomalies seafloor spreading fracture zone plate margins cretaceous tertiary Journal Article 1992 ftnio 2012-08-25T20:08:32Z A study of the bathymetric and linear magnetic anomalies between Dronning Maud Land, Antarctica and the South West Indian Ridge (SWIR) revealed a Mesozoic sequence of linear magnetic anomalies, M0 to M12 (108-126 Ma), a fracture zone offset (is approx. equal to 130 km), and the Cretaceous magnetic quiet zone between isochrons M0 (108 Ma) and 34 (80 Ma). The study sheds light on: (1) the evolution of an anomalous "stretched" pattern of seafloor anomalies during magnetic isochrons M0 and 34, and the associated offset (greater than 10 degrees) in some segments of the northeastern part of the SWIR; and (2) continuation of a proposed buried fracture zone to the south, where it abuts the Astrid Ridge off Dronning Maud Land. The history of spreading is related to dynamic pressures at the plate margin due to the Kergeulen-Heard mantle plume during Cretaceous time (is approx. equal to 110 Ma) Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Astrid Ridge ENVELOPE(12.000,12.000,-68.000,-68.000) Dronning Maud Land Indian |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
bathymetry magnetic anomalies seafloor spreading fracture zone plate margins cretaceous tertiary |
spellingShingle |
bathymetry magnetic anomalies seafloor spreading fracture zone plate margins cretaceous tertiary Rao, D.G. Chaubey, A.K. Ramprasad, T. The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
topic_facet |
bathymetry magnetic anomalies seafloor spreading fracture zone plate margins cretaceous tertiary |
description |
A study of the bathymetric and linear magnetic anomalies between Dronning Maud Land, Antarctica and the South West Indian Ridge (SWIR) revealed a Mesozoic sequence of linear magnetic anomalies, M0 to M12 (108-126 Ma), a fracture zone offset (is approx. equal to 130 km), and the Cretaceous magnetic quiet zone between isochrons M0 (108 Ma) and 34 (80 Ma). The study sheds light on: (1) the evolution of an anomalous "stretched" pattern of seafloor anomalies during magnetic isochrons M0 and 34, and the associated offset (greater than 10 degrees) in some segments of the northeastern part of the SWIR; and (2) continuation of a proposed buried fracture zone to the south, where it abuts the Astrid Ridge off Dronning Maud Land. The history of spreading is related to dynamic pressures at the plate margin due to the Kergeulen-Heard mantle plume during Cretaceous time (is approx. equal to 110 Ma) |
format |
Article in Journal/Newspaper |
author |
Rao, D.G. Chaubey, A.K. Ramprasad, T. |
author_facet |
Rao, D.G. Chaubey, A.K. Ramprasad, T. |
author_sort |
Rao, D.G. |
title |
The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
title_short |
The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
title_full |
The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
title_fullStr |
The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
title_full_unstemmed |
The Cretaceous-Tertiary sea floor off Dronning Maud Land, Antarctica |
title_sort |
cretaceous-tertiary sea floor off dronning maud land, antarctica |
publisher |
Elsevier |
publishDate |
1992 |
url |
http://drs.nio.org/drs/handle/2264/3023 |
long_lat |
ENVELOPE(12.000,12.000,-68.000,-68.000) |
geographic |
Astrid Ridge Dronning Maud Land Indian |
geographic_facet |
Astrid Ridge Dronning Maud Land Indian |
genre |
Antarc* Antarctica Dronning Maud Land |
genre_facet |
Antarc* Antarctica Dronning Maud Land |
op_rights |
Copyright [1992]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository. |
_version_ |
1766268031026069504 |