The early drift of the Indian plate
Abstract Plate kinematic models propose that India and Sri Lanka (INDSRI) separated from Antarctica by extremely slow seafloor spreading that started in early Cretaceous times, and that a long-distance ridge jump left a continental fragment stranded off the Antarctic margin under the Southern Kergue...
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ftdoajarticles:oai:doaj.org/article:2e57ee54fd60453b9d78f943adfdf0d4 2023-05-15T13:56:59+02:00 The early drift of the Indian plate Wilfried Jokat Tabea Altenbernd Graeme Eagles Wolfram H. Geissler 2021-05-01T00:00:00Z https://doi.org/10.1038/s41598-021-90172-z https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4 EN eng Nature Portfolio https://doi.org/10.1038/s41598-021-90172-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-90172-z 2045-2322 https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4 Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) Medicine R Science Q article 2021 ftdoajarticles https://doi.org/10.1038/s41598-021-90172-z 2022-12-31T09:02:30Z Abstract Plate kinematic models propose that India and Sri Lanka (INDSRI) separated from Antarctica by extremely slow seafloor spreading that started in early Cretaceous times, and that a long-distance ridge jump left a continental fragment stranded off the Antarctic margin under the Southern Kerguelen Plateau 1-3. Here, we present newly acquired magnetic and deep wide-angle seismic data that require a fundamental re-evaluation of these concepts. The new data clearly define the onset of oceanic crust in the Enderby Basin and off southern Sri Lanka, and date its formation with unprecedented confidence. The revised timing indicates that India and Sri Lanka detached from Antarctica earlier in the east than in the west. Furthermore, no compelling evidence for an extinct spreading axis is found in the Enderby Basin. A refined plate motion model indicates that India and Sri Lanka departed from Antarctica without major rift jumps, but by the action of three spreading ridges with different timings and velocities that must have been accommodated by significant intracontinental deformation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Indian Kerguelen The Antarctic Scientific Reports 11 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Medicine R Science Q |
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Medicine R Science Q Wilfried Jokat Tabea Altenbernd Graeme Eagles Wolfram H. Geissler The early drift of the Indian plate |
topic_facet |
Medicine R Science Q |
description |
Abstract Plate kinematic models propose that India and Sri Lanka (INDSRI) separated from Antarctica by extremely slow seafloor spreading that started in early Cretaceous times, and that a long-distance ridge jump left a continental fragment stranded off the Antarctic margin under the Southern Kerguelen Plateau 1-3. Here, we present newly acquired magnetic and deep wide-angle seismic data that require a fundamental re-evaluation of these concepts. The new data clearly define the onset of oceanic crust in the Enderby Basin and off southern Sri Lanka, and date its formation with unprecedented confidence. The revised timing indicates that India and Sri Lanka detached from Antarctica earlier in the east than in the west. Furthermore, no compelling evidence for an extinct spreading axis is found in the Enderby Basin. A refined plate motion model indicates that India and Sri Lanka departed from Antarctica without major rift jumps, but by the action of three spreading ridges with different timings and velocities that must have been accommodated by significant intracontinental deformation. |
format |
Article in Journal/Newspaper |
author |
Wilfried Jokat Tabea Altenbernd Graeme Eagles Wolfram H. Geissler |
author_facet |
Wilfried Jokat Tabea Altenbernd Graeme Eagles Wolfram H. Geissler |
author_sort |
Wilfried Jokat |
title |
The early drift of the Indian plate |
title_short |
The early drift of the Indian plate |
title_full |
The early drift of the Indian plate |
title_fullStr |
The early drift of the Indian plate |
title_full_unstemmed |
The early drift of the Indian plate |
title_sort |
early drift of the indian plate |
publisher |
Nature Portfolio |
publishDate |
2021 |
url |
https://doi.org/10.1038/s41598-021-90172-z https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4 |
geographic |
Antarctic Indian Kerguelen The Antarctic |
geographic_facet |
Antarctic Indian Kerguelen The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) |
op_relation |
https://doi.org/10.1038/s41598-021-90172-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-90172-z 2045-2322 https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4 |
op_doi |
https://doi.org/10.1038/s41598-021-90172-z |
container_title |
Scientific Reports |
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11 |
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1 |
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1766264579264872448 |