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Registros recuperados: 4
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Découverte de la surface d’érosion messinienne onshore/offshore dans deux lieux clés : le Promontoire Baléares (Ibiza) et la marge est-sarde (Orosei) ArchiMer
Maillard, Agnès; Gaullier, Virginie; Lézin, Carine; Chanier, Frank; Odonne, Francis; Lofi, Johanna.
As the Messinian sea-level draw down associated with the Messinian Salinity Crisis is still questioned, we propose to show that the widely spread erosion surface affecting the Mediterranean margins is indeed linked to an exondation demonstrated from offshore and onshore data. Our study presents a comprehensive onshore to offshore correlation of the Messinian erosional surface. It is focused on small drainage systems or interfluve areas, outside of evaporite basins or incised canyons, where the Messinian erosion had not yet been studied previously: around Ibiza on the Balearic Promontory and around Orosei on the Eastern Sardinian margin, Tyrrhenian Basin, both areas where new offshore data were recently acquired. We show that the late Messinian erosion...
Tipo: Text Palavras-chave: Crise de salinité messinienne; Méditerranée nord-occidentale; Surface d' Érosion; Ibiza; Marge est-sarde; Messinian Salinity Crisis (MSC); Northwestern Mediterranean; Erosion surface; Ibiza; Eastern Sardinian margin.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00622/73392/72608.pdf
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Diapirisme salifère et dynamique sédimentaire dans le bassin liguro-provencal : Données sismiques et modèle analogiques ArchiMer
Gaullier, Virginie.
La première partie est une présentation générale d'une part de la thématique scientifique dans laquelle s'intègre ce travail, des données et outils utilisés ; d'autre part des principales caractéristiques du secteur d'étude à partir de résultats antérieures et de données nouvelles. La deuxième partie concerne l'étude des processus et de la dynamique sédimentaires dans le contexte morphostructural du bassin liguro-provençal à partir des données bathymétriques Seabeam et Simrad et des profils de sondeur de sédiments.
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Ano: 1993 URL: http://archimer.ifremer.fr/doc/00034/14509/11844.pdf
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Recent and active deformation pattern off the easternmost Algerian margin, Western Mediterranean Sea: New evidence for contractional tectonic reactivation ArchiMer
Kherroubi, Abdelaziz; Deverchere, Jacques; Yelles, Abdelkarim; De Lepinay, Bernard Mercier; Domzig, Anne; Cattaneo, Antonio; Bracene, Rabah; Gaullier, Virginie; Graindorge, David.
We describe for the first time a set of large active thrusts and folds near the foot of the easternmost Algerian margin, Western Mediterranean, from swath bathymetry and high-resolution seismic data acquired in 2005 during the Maradja2/Samra cruise. This active system resumes a previous passive margin and creates growth strata deposition on the limbs of large folds, resulting in the development of perched basins at the foot of the margin since less than similar to 1 Ma. They form a set of overlapping fault segments verging toward the Algerian basin, in a way similar to what has been observed off eastern Algiers on the rupture zone of the 2003 Mw 6.8 Boumerdes earthquake. The horizontal shortening rate across large folds is estimated to be of the order of 1...
Tipo: Text Palavras-chave: Subduction inception; Africa Eurasia convergence; Seismic reflection; Seismic hazards; Growth strata; Folding; Active faulting; Annaba; Algerian margin.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6850.pdf
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Searching for the Africa-Eurasia Miocene boundary offshore western Algeria (MARADJA'03 cruise) ArchiMer
Domzig, Anne; Yelles, Karim; Le Roy, Charlotte; Deverchere, Jacques; Bouillin, Jean-pierre; Bracene, Rabah; De Lepinay, Bernard Mercier; Le Roy, Pascal; Calais, Eric; Kherroubi, Abdelaziz; Gaullier, Virginie; Savoye, Bruno; Pauc, Henri.
We present new results from the MARADJA'03 cruise depicting the geological structures offshore central and western Algeria. Using swath bathymetry and seismic reflection data, we map and discuss the offshore limits of the Internal Zones corresponding to relics of the AIKaPeCa domain that drifted and collided the African plate during the Miocene. We identify large reverse faults and folds that reactivate part of these limits and are still active today. The morphology of the westernmost NE-SW margin suggests a former strike-slip activity accommodating a westward block translation responsible for the shift of the Internal Zones towards the Moroccan Rif.
Tipo: Text Palavras-chave: Sismique réflexion; Bathymétrie multifaisceau; Évolution tectonique du Bassin méditerranéen; Néotectonique; Zones Internes; Marge Algérienne; Seismic reflection; Swath bathymetry; Tectonic evolution of the Mediterranean; Internal zones neotectonics; Algerian margin.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1211.pdf
Registros recuperados: 4
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