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| Benabdellouahed, Massinissa; Klingelhoefer, Frauke; Gutscher, M. -a.; Rabineau, Marina; Biari, Youssef; Hafid, M.; Duarte, J. C.; Schnabel, M.; Baltzer, Agnes; Pedoja, K.; Le Roy, P.; Reichert, C.; Sahabi, M.. |
| Re-examination of marine geophysical data from the continental margin of West Morocco reveals a broad zone characterized by deformation, active faults and updoming offshore the High Atlas (Morocco margin), situated next to the Tafelney Plateau. Both seismic reflection and swath-bathymetric data, acquired during Mirror marine geophysical survey in 2011, indicate recent uplift of the margin including uplift of the basement. This deformation, which we propose to name the Atlantic Atlas tectonic arch, is interpreted to result largely through uplift of the basement, which originated during the Central Atlantic rifting stage - or even during phases of Hercynian deformation. This has produced a large number of closely spaced normal and reverse faults, “piano key... |
| Tipo: Text |
Palavras-chave: Atlas Mountain belt; Tectonic arch; Moroccan passive margin; Submerged terraces; Uplift. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00378/48975/49382.pdf |
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| Biari, Youssef; Klingelhoefer, Frauke; Sahabi, Mohamed; Funck, T.; Benabdellouahed, Massinissa; Schnabel, M.; Reichert, C.; Gutscher, M-a; Bronner, Adrien; Austin, J. A.. |
| Study of the deep structure of conjugate passive continental margins combined with detailed plate kinematic reconstructions can provide constraints on the mechanisms of rifting and formation of initial oceanic crust. In this study the central Atlantic conjugate margins are compared based on compilation of wide-angle seismic profiles from NW Africa Nova Scotian and U.S. passive margins. The patterns of volcanism, crustal thickness, geometry, and seismic velocities in the transition zone suggest symmetric rifting followed by asymmetric oceanic crustal accretion. Conjugate profiles in the southern central Atlantic image differences in the continental crustal thickness. While profiles on the eastern U.S. margin are characterized by thick layers of magmatic... |
| Tipo: Text |
Palavras-chave: Deep structure; Plate reconstruction; Wide-angle seismic; Passive margins. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00389/50072/50666.pdf |
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