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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Autores principales:	Wilfried Jokat, Tabea Altenbernd, Graeme Eagles, Wolfram H. Geissler
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4
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spelling	oai:doaj.org-article:2e57ee54fd60453b9d78f943adfdf0d42021-12-02T14:49:18ZThe early drift of the Indian plate10.1038/s41598-021-90172-z2045-2322https://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d42021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90172-zhttps://doaj.org/toc/2045-2322Abstract 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.Wilfried JokatTabea AltenberndGraeme EaglesWolfram H. GeisslerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wilfried Jokat Tabea Altenbernd Graeme Eagles Wolfram H. Geissler The early drift of the Indian plate
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
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://doaj.org/article/2e57ee54fd60453b9d78f943adfdf0d4
work_keys_str_mv	AT wilfriedjokat theearlydriftoftheindianplate AT tabeaaltenbernd theearlydriftoftheindianplate AT graemeeagles theearlydriftoftheindianplate AT wolframhgeissler theearlydriftoftheindianplate AT wilfriedjokat earlydriftoftheindianplate AT tabeaaltenbernd earlydriftoftheindianplate AT graemeeagles earlydriftoftheindianplate AT wolframhgeissler earlydriftoftheindianplate
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The early drift of the Indian plate

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