Results from the ESCI-N3.3 marine deep seismic profile along the Cantabrian continental margin
- J. R. Martínez Catalán 1
- P. Ayarza Arribas 1
- J. A. Pulgar 2
- A. Pérez Estaún 3
- J. Gallart 3
- A. Marcos 2
- F. Bastida 2
- J. Álvarez-Marrón 4
- F. González Lodeiro 5
- J. Aller 2
- J. J. Dañobeitia 3
- E. Banda 3
- D. Córdoba 6
- M. C. Comas 4
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1
Universidad de Salamanca
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2
Universidad de Oviedo
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3
Instituto de Ciencias de la Tierra Jaume Almera
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4
Instituto Andaluz de Ciencias de la Tierra
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5
Universidad de Granada
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6
Universidad Complutense de Madrid
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ISSN: 0214-2708
Year of publication: 1995
Volume: 8
Issue: 4
Pages: 341-354
Type: Article
More publications in: Revista de la Sociedad Geológica de España
Abstract
The seismic profile ESCI-N3.3, sub-perpendicular to the strike of the Variscan structures, has imaged the offshore continuation of the central section of the NW lberian Massif. This study describes its main geological features and proposes tectonic interpretations based on geological information and constrained by available refraction/wide-angle reflection data. The main results include the identification of two Mesozoic-Cenozoic sedimentary basins, the occurrence of mid-crustal dipping events related to the fold and thrust tectonics of the Westasturian-Leonese Zone and the possible existence of a crustal-scale basal detachment for this zone. The reflectivity is generally high at lower crustal levels. In addition, dipping events appearing below the reflective lower crust might bear upon Alpine subduction zones.