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Seismic stratigraphy of the NW Moroccan Atlantic continental shelf and Quaternary deformation at the offshore termination of the southern Rif front

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Title: Seismic stratigraphy of the NW Moroccan Atlantic continental shelf and Quaternary deformation at the offshore termination of the southern Rif front
Alternate Title: Stratigraphie sismique du plateau continental NW atlantique marocain et déformations quaternaires à la terminaison occidentale du front sud-rifain
Authors: Maad, Nissrine1,2,3, Le Roy, Pascal1,2 leroy@univ-brest.fr, Sahabi, Mohamed3, Gutscher, Marc-André1,2, Hssain, M.4, Babonneau, Nathalie1,2, Rabineau, Marina1,2, Lanoë, Brigitte Van Vliet1,2
Source: Comptes Rendus Géoscience. Sep2010, Vol. 342 Issue 9, p731-740. 10p.
Subjects: Earthquake hazard analysis, Continental shelf, Seismic reflection method, Sequence stratigraphy, Bathymetric maps, Quaternary stratigraphic geology, Geologic faults, Rock deformation
Geographic Terms: Rif Mountains (Morocco), Morocco
Abstract (English): Abstract: A recent high resolution seismic survey was carried out along the North-West Moroccan Atlantic continental shelf to perform sequence stratigraphy and to better understand the link between the onshore observations across the western termination of the Rif front and the multibeam bathymetric data previously collected across the Gulf of Cadiz. Seismic interpretation clearly shows evidence of deformation affecting the Pleistocene sedimentary cover. This is mainly located between the Lalla Zahra ridge and the Neogene nappes that outcrop at the seabed to the North of Larache, where the identified structures bound the upper part of a gravitationally spreading lobe and are interpreted to be developed by activation of the major tectonic structures located at the southern front of the Rif Cordillera. The offshore extension of the Lalla Zahra Ridge is characterised by an east-west trending major folded and faulted corridor. This structure marks the active front of Prerifan area and corresponds to a major Quaternary kinematic boundary in the western prolongation of the ENE-WSW trending Jebha fault. [ABSTRACT FROM AUTHOR]
Abstract (French): Résumé: L’interprétation des nouvelles données de sismique-réflexion enregistrées le long de la plate-forme continentale NW-atlantique marocaine permet d’établir un lien entre les observations menées à terre le long de la terminaison occidentale du front sud-rifain et les données bathymétriques disponibles à travers le Golfe de Cadiz. L’établissement d’une stratigraphie sismique montre clairement l’existence de déformations importantes de la couverture sédimentaire au cours du Pléistocène. Ces dernières concernent avant tout le segment situé entre la ride de Lalla Zahra et les nappes néogènes affleurantes au nord de Larache, où les structures identifiées correspondent à la partie amont d’un lobe d’étalement gravitaire, entretenu par la réactivation des grandes structures frontales prérifaines. Le prolongement offshore de la zone côtière de Lalla Zahra correspond à un couloir de déformations de direction est-ouest marquant le front actif de la zone prérifain. Cette limite cinématique quaternaire majeure constitue le prolongement occidental de la faille de Jebha connue dans le domaine d’Alboran.
Copyright of Comptes Rendus Géoscience is the property of Academie des Science, Centre Mersenne and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Seismic stratigraphy of the NW Moroccan Atlantic continental shelf and Quaternary deformation at the offshore termination of the southern Rif front
– Name: TitleAlt
  Label: Alternate Title
  Group: TiAlt
  Data: Stratigraphie sismique du plateau continental NW atlantique marocain et déformations quaternaires à la terminaison occidentale du front sud-rifain
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Maad%2C+Nissrine%22">Maad, Nissrine</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Le+Roy%2C+Pascal%22">Le Roy, Pascal</searchLink><relatesTo>1,2</relatesTo><i> leroy@univ-brest.fr</i><br /><searchLink fieldCode="AR" term="%22Sahabi%2C+Mohamed%22">Sahabi, Mohamed</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Gutscher%2C+Marc-André%22">Gutscher, Marc-André</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hssain%2C+M%2E%22">Hssain, M.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Babonneau%2C+Nathalie%22">Babonneau, Nathalie</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rabineau%2C+Marina%22">Rabineau, Marina</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lanoë%2C+Brigitte+Van+Vliet%22">Lanoë, Brigitte Van Vliet</searchLink><relatesTo>1,2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Comptes+Rendus+Géoscience%22">Comptes Rendus Géoscience</searchLink>. Sep2010, Vol. 342 Issue 9, p731-740. 10p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Continental+shelf%22">Continental shelf</searchLink><br /><searchLink fieldCode="DE" term="%22Seismic+reflection+method%22">Seismic reflection method</searchLink><br /><searchLink fieldCode="DE" term="%22Sequence+stratigraphy%22">Sequence stratigraphy</searchLink><br /><searchLink fieldCode="DE" term="%22Bathymetric+maps%22">Bathymetric maps</searchLink><br /><searchLink fieldCode="DE" term="%22Quaternary+stratigraphic+geology%22">Quaternary stratigraphic geology</searchLink><br /><searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br /><searchLink fieldCode="DE" term="%22Rock+deformation%22">Rock deformation</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Rif+Mountains+%28Morocco%29%22">Rif Mountains (Morocco)</searchLink><br /><searchLink fieldCode="DE" term="%22Morocco%22">Morocco</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: Abstract: A recent high resolution seismic survey was carried out along the North-West Moroccan Atlantic continental shelf to perform sequence stratigraphy and to better understand the link between the onshore observations across the western termination of the Rif front and the multibeam bathymetric data previously collected across the Gulf of Cadiz. Seismic interpretation clearly shows evidence of deformation affecting the Pleistocene sedimentary cover. This is mainly located between the Lalla Zahra ridge and the Neogene nappes that outcrop at the seabed to the North of Larache, where the identified structures bound the upper part of a gravitationally spreading lobe and are interpreted to be developed by activation of the major tectonic structures located at the southern front of the Rif Cordillera. The offshore extension of the Lalla Zahra Ridge is characterised by an east-west trending major folded and faulted corridor. This structure marks the active front of Prerifan area and corresponds to a major Quaternary kinematic boundary in the western prolongation of the ENE-WSW trending Jebha fault. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (French)
  Group: Ab
  Data: Résumé: L’interprétation des nouvelles données de sismique-réflexion enregistrées le long de la plate-forme continentale NW-atlantique marocaine permet d’établir un lien entre les observations menées à terre le long de la terminaison occidentale du front sud-rifain et les données bathymétriques disponibles à travers le Golfe de Cadiz. L’établissement d’une stratigraphie sismique montre clairement l’existence de déformations importantes de la couverture sédimentaire au cours du Pléistocène. Ces dernières concernent avant tout le segment situé entre la ride de Lalla Zahra et les nappes néogènes affleurantes au nord de Larache, où les structures identifiées correspondent à la partie amont d’un lobe d’étalement gravitaire, entretenu par la réactivation des grandes structures frontales prérifaines. Le prolongement offshore de la zone côtière de Lalla Zahra correspond à un couloir de déformations de direction est-ouest marquant le front actif de la zone prérifain. Cette limite cinématique quaternaire majeure constitue le prolongement occidental de la faille de Jebha connue dans le domaine d’Alboran. </ce:abst [Copyright 2010 Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Comptes Rendus Géoscience is the property of Academie des Science, Centre Mersenne and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.crte.2010.04.006
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 731
    Subjects:
      – SubjectFull: Earthquake hazard analysis
        Type: general
      – SubjectFull: Continental shelf
        Type: general
      – SubjectFull: Seismic reflection method
        Type: general
      – SubjectFull: Sequence stratigraphy
        Type: general
      – SubjectFull: Bathymetric maps
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      – SubjectFull: Quaternary stratigraphic geology
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      – SubjectFull: Geologic faults
        Type: general
      – SubjectFull: Rock deformation
        Type: general
      – SubjectFull: Rif Mountains (Morocco)
        Type: general
      – SubjectFull: Morocco
        Type: general
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      – TitleFull: Seismic stratigraphy of the NW Moroccan Atlantic continental shelf and Quaternary deformation at the offshore termination of the southern Rif front
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              Text: Sep2010
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