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Discovery of Messinian Canyons and new seismic stratigraphic model, Offshore Provence (SE France): implications for the hydrographic network reconstruction ArchiMer
Tassy, A.; Fournier, F.; Munch, P.; Borgomano, J.; Thinon, I.; Fabri, Marie-claire; Rabineau, M.; Arfib, B.; Begot, J.; Beslier, M. -o; Cornee, J. -j.; Fournillon, A.; Gorini, C.; Guennoc, P.; Leonide, P.; Oudet, J.; Paquet, F.; Sage, F.; Toullec, R..
The interpretation of high-resolution 2D marine seismic profiles together with the analysis of sea-bottom cores allowed a stratigraphic and structural framework of the Provence continental shelf to be proposed. The integration of onshore and offshore stratigraphy, structure and geomorphology provided new insights into Messinian paleotopography and paleohydrography. A geological map of the offshore Provence continental shelf, isobath map of the base Plio-Quaternary surface are presented for the first time in this area. The base Plio-Quaternary surface is a polyphased unconformity that is composed of deep canyons developed by fluvial erosion during the Messinian event, and wave-cut surfaces formed during post-Messinian transgressions. The study evidenced a...
Tipo: Text Palavras-chave: Western Mediterranean; Provence continental shelf; Base Plio-Quaternary surface; Submarine canyon; Karst; Offshore seismic data; Shallow coring; Geological mapping.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00189/30027/28512.pdf
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Tectonic and sedimentary architecture of the Karukéra spur: A record of the Lesser Antilles fore-arc deformations since the Neogene ArchiMer
De Min, L.; Lebrun, J. F.; Cornee, J. J.; Munch, P.; Leticee, J. L.; Quillevere, F.; Melinte-dobrinescu, M.; Randrianasolo, A.; Marcaillou, B; Zami, F..
The Karukéra spur is an easternmost submerged rise of the Lesser Antilles fore-arc in the Guadeloupe archipelago, culminating about 4000 m above the fore-arc basin 150 km west of the deformation front. The analysis of 3500 km 2D high-resolution multichannel seismic reflection and multibeam bathymetric data, and the study of 14 core samples, allow for the first time to reconstruct its sedimentary anatomy and tectonic evolution. Seven seismic units (Us1 to Us7) are evidenced, organized into four major depositional sequences separated by erosional surfaces. Units Us1 to Us4 thicken to the south-southeast on the spur. The sedimentary deposits rest upon a deeply eroded metamorphic basement of the Caribbean Plate as in La Désirade Island. Sequence 1 (units Us1...
Tipo: Text Palavras-chave: Lesser Antilles; Fore-arc; Karukéra spur; Neogene; Extensional tectonics; Basal erosion.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00252/36372/34912.pdf
Registros recuperados: 2
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