Consulta: subjectFacets:"Deep seismic"
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Data/hora: 12/06/2024 02:12:12

Crustal structure of the NW Moroccan margin from deep seismic data (SISMAR Cruise)
Provedor de dados: 5
Autores: Jaffal, Mohammed; Klingelhoefer, Frauke; Matias, Luis; Teixeira, Fernando; Amrhar, Mostafa.
During the SISMAR cruise (spring 2001), new deep seismic data were acquired on the Atlantic Moroccan margin. The purpose of the present work is to analyse and to interpret a part of the data consisting of four wide-angle seismic profiles (4, 5, 8 and 10) recorded offshore El Jadida. Lines 4 and 5, perpendicular to the margin, show a crustal thickness of 35 km under the western Moroccan Meseta which thins progressively seaward where it reaches a minimum thickness of 10 km. The calculated velocity models show that this crust consists of two crustal layers overlain by a sedimentary cover corresponding to the post-Paleozoic sediments, characterised by a low velocity. The detailed shallow structure is obtained primarily from multichannel seismic data. Half...
Tipo: Text
Palavras-chave: Morocco; Passive margin; Gravity; OBS; Velocity model; Deep seismic.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6588.pdf

Structure of the Gabon Margin from integrated seismic reflection and gravity data
Provedor de dados: 5
Autores: Dupre, Stephanie; Cloetingh, Sierd; Bertotti, Giovanni.
In the South Gabon Basin, deep multi-channel seismic reflection and gravity modeling analysis have shed light on key features of the structure of the margin. The thinned continental crust beneath the Gabon Margin appears to be composed of two distinct layers, separated by a clear, strong and more or less continuous reflector running in the 7–10 s TWT window. The lower crust is characterized by a higher density, intermediate between the lower values of the upper crust and the denser values of the mantle. The lower crust is irregularly shaped and presents lateral thickness variations along the direction of thinning and along the coast. In the offshore thinned continental domain, the lower and upper crust form a 20–25 km thick body. Crustal thicknesses point...
Tipo: Text
Palavras-chave: Deep seismic; Gravity modeling; Crustal structure; Rifted continental margins; Lower crust; Gabon Margin.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00039/15020/12347.pdf