Modelos tectono-sedimentarios de cuencas extensivas: semi-graben, graben de compensación y sinclinal sobre rampa (margen pasivo del Golfo de León, SE de Francia).

• Benedicto, A. ^[1]
  1. [1] Université Montpellier 2, Francia
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 4, 1996 (Ejemplar dedicado a: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996), págs. 861-864
• Idioma: español
• Títulos paralelos:
  • Tectono-sedimentary models for extensional basin: half-graben, compensation graben and hangingwall syncline (Gulf of Lion passive margin, SE France)
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• Resumen

  • Three tectono-sedimentary models are proposed for extensional basins in the Gulf of Lion passive margin: (1) hall-graben associated to a listric fault, (2) compensation graben associated to a two-segments planar fault and (3) hangingwall ramp syncline associated to a ramp-flat listric fault. In the Vistrenque graben, along-strike changes in the geometry of the Nimes fault induced along-strike changes of the geometry of the basin: in the south, a half-graben resulted from a listric fault profile at depth; in the north, a compensation graben results from a two-segments planar fault profile. The Les Matelles basin is a hangingwall syncline which results from a ramp-flat listric fault geometry. Erosion of the hangingwall during extension controlled the architecture of the syn-rift sedimentation, resulting in a rapid migration of the depoeentres towards the fault.