Salt tectonics, a controlling factor on the development of the Marseilles and Grand-Rhone sedimentary ridges, Gulf of Lions, western Mediterranean Sea

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• 作者：dos Reis ; Antonio Tadeu ; Gorini ; Christian ; Mauffret ; Alain ; Weibull ; Wiktor
• 关键词：Marseilles and Grand-Rhone ridges ; salt tectonics ; salt&ndash ; sediment interaction ; Gulf of Lions ; France ; rides de Marseille et du Grand Rhô ; ne ; tectonique salifè ; re ; interaction sel&ndash ; sé ; diment ; golfe du Lion ; France
• 刊名：Comptes Rendus Geoscience
• 出版年：2004
• 出版时间：February, 2004
• 年：2004
• 卷：336
• 期：2
• 页码：143-150
• 全文大小：1.54 M

文摘

The Marseilles (also called Marseilles/Planier) and Grand Rhone sedimentary ridges, offshore the Gulf of Lions, western Mediterranean Sea, are generated by sediment spillover funnelled by the Marseilles and Grand-Rhone canyons, respectively. We show that the Marseilles and Grand-Rhone canyon directions are tectonically conditioned by Plio-Quaternary salt-induced sea-floor relief. Overburden extension in the area created an assemblage of listric faults running parallel to the strike of the continental margin. This salt-induced topography resulted in accentuated fault scarps impacting the sea-floor morphology and forcing submarine valleys to deflect to the east. Gravity-induced extension equally influenced the morphological pattern of the valley overbanking deposits. Sediment spillover occurred on both flanks of the canyons, but because active faulting generated space accommodation for overflow deposits, it inhibited the development of typical levee morphology along the canyons' left flanks. To cite this article: A.T. dos Reis, C. R. Geoscience 336 (2004).