The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting

We report the discovery of 173.4 Ma hotspot-related magmatic rocks in the basement of the Demerara Plateau, offshore French Guiana and Suriname. According to plate reconstructions, a single hotspot may be responsible for the magmatic formation of (1) both the Demerara Plateau (between 180 and 170 Ma...

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Autores principales: Basile, Christophe, Girault, Igor, Paquette, Jean-Louis, Agranier, Arnaud, Loncke, Lies, Heuret, Arnauld, Poetisi, Ewald
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198611/
https://www.ncbi.nlm.nih.gov/pubmed/32366924
http://dx.doi.org/10.1038/s41598-020-64333-5
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author Basile, Christophe
Girault, Igor
Paquette, Jean-Louis
Agranier, Arnaud
Loncke, Lies
Heuret, Arnauld
Poetisi, Ewald
author_facet Basile, Christophe
Girault, Igor
Paquette, Jean-Louis
Agranier, Arnaud
Loncke, Lies
Heuret, Arnauld
Poetisi, Ewald
author_sort Basile, Christophe
collection PubMed
description We report the discovery of 173.4 Ma hotspot-related magmatic rocks in the basement of the Demerara Plateau, offshore French Guiana and Suriname. According to plate reconstructions, a single hotspot may be responsible for the magmatic formation of (1) both the Demerara Plateau (between 180 and 170 Ma) and the Guinea Plateau (circa 165 Ma) during the end of the Jurassic rifting of the Central Atlantic; (2) both Sierra Leone and Ceara Rises (mainly from 76 to 68 Ma) during the upper Cretaceous oceanic spreading of the Equatorial Atlantic ocean; (3) the Bathymetrists seamount chain since the upper Cretaceous. The present-day location of the inferred Sierra Leone hotspot should be 100 km west of the Knipovich Seamount.
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spelling pubmed-71986112020-05-08 The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting Basile, Christophe Girault, Igor Paquette, Jean-Louis Agranier, Arnaud Loncke, Lies Heuret, Arnauld Poetisi, Ewald Sci Rep Article We report the discovery of 173.4 Ma hotspot-related magmatic rocks in the basement of the Demerara Plateau, offshore French Guiana and Suriname. According to plate reconstructions, a single hotspot may be responsible for the magmatic formation of (1) both the Demerara Plateau (between 180 and 170 Ma) and the Guinea Plateau (circa 165 Ma) during the end of the Jurassic rifting of the Central Atlantic; (2) both Sierra Leone and Ceara Rises (mainly from 76 to 68 Ma) during the upper Cretaceous oceanic spreading of the Equatorial Atlantic ocean; (3) the Bathymetrists seamount chain since the upper Cretaceous. The present-day location of the inferred Sierra Leone hotspot should be 100 km west of the Knipovich Seamount. Nature Publishing Group UK 2020-05-04 /pmc/articles/PMC7198611/ /pubmed/32366924 http://dx.doi.org/10.1038/s41598-020-64333-5 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Basile, Christophe
Girault, Igor
Paquette, Jean-Louis
Agranier, Arnaud
Loncke, Lies
Heuret, Arnauld
Poetisi, Ewald
The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title_full The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title_fullStr The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title_full_unstemmed The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title_short The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
title_sort jurassic magmatism of the demerara plateau (offshore french guiana) as a remnant of the sierra leone hotspot during the atlantic rifting
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198611/
https://www.ncbi.nlm.nih.gov/pubmed/32366924
http://dx.doi.org/10.1038/s41598-020-64333-5
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