Estudio de alta resolución de las fallas activas y de procesos sedimentarios asociados al cañón de Sao Vicente, margen sudoeste de Iberia
- A. Vizcaino 1
- E. Gràcia 1
- R. Pallàs 2
- Pedro Terrinha 3
- C. Escutia 4
- J. Dañobeitia 1
- C. Jacobs 5
- 1 UTM-CSIC
- 2 Dept. de Geodinámica i Geofísica, Univ. Barcelona
- 3 Instituto Geológico e Mineiro, Dpto. Geología Marinha,
- 4 Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR)
- 5 Challenger Div. Seafloor Processes, Southampton Oceanography Centre
ISSN: 1576-5172
Année de publication: 2004
Titre de la publication: VI CONGRESO GEOLÓGICO DE ESPAÑA, ZARAGOZA, 12-15 JULIO, 2004
Número: 6
Pages: 215-218
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
The Southwest Iberian Margin is caracterized by an intense and diffuse seismic activity due to the convergence between Eurasian and African plates. The aim of the next study is to set the different structures and sedimentological and acoustic facies on Sâo Vicente Canyon from TOBY mosaics,TOPAS profiler, Swath bathymetric, acoustic backscatter and multichannel seismic images. SäoVicente Canyon is settled in a syncline where we identified several active faults in the bottom (SäoVicente Faults and Horseshoe Faults). The tectonic activity has continued until present, demostra-ted in one hand because actual shallow origin of actual earthquake hypocentres and in a second hand by presence of step escarpments along the thrust trace. These faults control the canyon direction which is suggested by the angular trace and on BIGSETS seismic profiles. The canyon tloorappears highly reflective on TOBI mosaic due to be the rock outcrops. Furthermore, there are a big amount of acoustic facies which correspond with different sedimentological facies.