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| Mascle, J; Guiraud, M; Benkhelil, J; Basile, C; Bouillin, Jp; Mascle, G; Cousin, M; Durand, M; Dejax, J; Moullade, M. |
| During the Equanaute survey (June 1992), fourteen submersible dives were performed between 4950 and 2250 m water depths across the southern slope of the Cote d'Ivoire-Ghana Marginal Ridge (CIGMR), in the eastern Equatorial Atlantic. The CIGMR, a high-standing topographic marginal ridge along the Cote d'Ivoire-Ghana transform margin, is believed to result from a complex structural evolution due to the specific wrench-related rifting between Western Equatorial Africa and Northeastern Brazil, in Early Cretaceous times. In this paper we report and discuss geological observations made during dives, and sample analyses to resolve the lithology, paleoenvironmental conditions, age and origin of the CIGMR. The data help in better characterizing the different... |
| Tipo: Text |
Palavras-chave: Marge transformante; Géologie; Côte d’lvoire-Ghana; Atlantique Equatorial; Transform margin; Geology; Côte d’Ivoire-Ghana; Equatorial Atlantic. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43694/43118.pdf |
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| Steiger, T; Cousin, M. |
| The Jurassic and Lower Cretaceous carbonate platform of the Mazagan submarine plateau is composed of 3 main facies units: Facies A comprises neritic shallow marine lithologies of the Oxfordian to Kimmeridgian carbonate ramp and the beginning of the Tithonian carbonate platform. Facies B contains hemipelagic sediments which are the result of platform defacing processes mixed with pelagic influx. Facies C is composed of intertidal to shallow subtidal sediments, deposited on the top of the platform. The depositional history of the carbonate platform is strongly influenced by blockfaulting and sea level changes. During the formation of the Mazagan Escarpment subsiding marginal blocks developed a steep slope composed of numerous steps of different vertical and... |
| Tipo: Text |
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| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00247/35835/34345.pdf |
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| Auzende, J M; Rad, Uvon; Ruellan, E; Biju-duval, B; Cepek, P; Cousin, M; Dostmann, H. |
| In September-October 1982, a joint German-French project to explore the Mazagan (El Jadida) escarpment and plateau was carried out with the French submersible sp 3000 Cyana . The main purpose of CYAMAZ cruise was to observe and sample the steepest part of the escarpment where previous works suggest that the oldest series (since Jurassic) of the infilling of the Central Atlantic Ocean are outcropping. In this paper the authors present the main outline and results of the eighteen dives operated during the CYAMAZ cruise. These results essentially concern the stratigraphy and structure of the sedimentary series outcropping along the Mazagan escarpment. The age of the sedimentary sequence ranges from Late Jurassic-Lower Neocomian until Plio-Pleistocene. Late... |
| Tipo: Text |
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| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00247/35833/34343.pdf |
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