| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
The Jurassic magmatism of the Demerara Plateau (offshore French Guiana) as a remnant of the Sierra Leone hotspot during the Atlantic rifting
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| Autores: |
Basile, Christophe
Girault, Igor
Paquette, Jean-louis
Agranier, Arnaud
Loncke, Lies
Heuret, Arnauld
Poetisi, Ewald
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| Data: |
2020-05
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| Ano: |
2020
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| Resumo: |
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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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00628/74034/73363.pdf
https://archimer.ifremer.fr/doc/00628/74034/73364.pdf
DOI:10.1038/s41598-020-64333-5
https://archimer.ifremer.fr/doc/00628/74034/
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| Editor: |
Springer Science and Business Media LLC
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| Formato: |
application/pdf
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| Fonte: |
Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2020-05 , Vol. 10 , N. 1 , P. 7486 (12p.)
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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