| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Recent and active deformation pattern off the easternmost Algerian margin, Western Mediterranean Sea: New evidence for contractional tectonic reactivation
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| Autores: |
Kherroubi, Abdelaziz
Deverchere, Jacques
Yelles, Abdelkarim
De Lepinay, Bernard Mercier
Domzig, Anne
Cattaneo, Antonio
Bracene, Rabah
Gaullier, Virginie
Graindorge, David
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| Data: |
2009-06
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| Ano: |
2009
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| Palavras-chave: |
Subduction inception
Africa Eurasia convergence
Seismic reflection
Seismic hazards
Growth strata
Folding
Active faulting
Annaba
Algerian margin
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| Resumo: |
We describe for the first time a set of large active thrusts and folds near the foot of the easternmost Algerian margin, Western Mediterranean, from swath bathymetry and high-resolution seismic data acquired in 2005 during the Maradja2/Samra cruise. This active system resumes a previous passive margin and creates growth strata deposition on the limbs of large folds, resulting in the development of perched basins at the foot of the margin since less than similar to 1 Ma. They form a set of overlapping fault segments verging toward the Algerian basin, in a way similar to what has been observed off eastern Algiers on the rupture zone of the 2003 Mw 6.8 Boumerdes earthquake. The horizontal shortening rate across large folds is estimated to be of the order of 1 mm/yr. Although no historical earthquakes are reported here, these fault segments could have been responsible for large (M similar to 7.5) events in the past. This young tectonic system further supports the hypothesis of subduction inception of the Neogene oceanic lithosphere in the context of the Africa-Eurasia convergence.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2009/publication-6850.pdf
DOI:10.1016/j.margeo.2008.05.016
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| Editor: |
Elsevier
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| Relação: |
http://archimer.ifremer.fr/doc/00000/6850/
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| Formato: |
application/pdf
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| Fonte: |
Marine Geology (0025-3227) (Elsevier), 2009-06 , Vol. 261 , N. 1-4 , P. 17-32
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| Direitos: |
2009 Published by Elsevier Inc.
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