Modelización gravimétrica de la transición entre corteza continental y oceánica en el margen oeste de Galicia

• M. Druet ^[1] ; A. Muñoz Martín ^[1] ; A. Carbó ^[1] ; J. Álvarez ^[1] ; P. Llanes ^[1]
  1. [1] Universidad Complutense de Madrid

     Universidad Complutense de Madrid

     Madrid, España

     
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 3, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)), págs. 229-232
• Idioma: español
• Enlaces
  • Texto Completo Ejemplar
• Resumen

  • Since 2001 marine gravity data have been collected on the North Atlantic Ocean around Calida Margin. The aim of this paper is the analysis of the Bouguer anomaly map o f the west margin of Calida and the modelling of the ocean-continent boundary in this area. Very high Bouguer anomaly values have been obtained for this region, specially in the oceanic crust of the Iberian Abyssal Plain. A gravity low is related to the Galicia Bank continental block, and relative positive elongate highs correspond with the Peridotite Ridge and the Galicia Interior Basin. The two gravity models presented here, based on seismic refraction and reflection profiles, have allowed the characterization o f the gravity limit between oceanic and continental crust in this margin. This limit is located 15 km eastwards in the northern profile 1, from the previous proposed limit based on sedimentary criteria.