Cartografía del ecocarácter del Margen Continental de Galicia y de las llanuras abisales adyacentes
- A. Maestro 1
- G. Jané 1
- F. Fernández Saéz 2
- E. Llave 1
- F. Bohoyo 1
- J. Navas 1
- S. Mink 1
- M. Druet 1
- M. Gómez Ballesteros 3
- J. Martín Dávila 4
- M. Catalán 4
- A. Carbó 5
- A. Muñoz-Martín 5
- J.L. Granja 5
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1
Instituto Geológico y Minero de España
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- 2 Elittoral S.L.N.E., Estudios de ingeniería costera y oceanográfica
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3
Instituto Español de Oceanografía
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4
Real Instituto y Observatorio de la Armada
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Real Instituto y Observatorio de la Armada
San Fernando, España
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5
Universidad Complutense de Madrid
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ISSN: 1576-5172
Year of publication: 2021
Issue Title: X Congreso Geológico de España
Issue: 18
Pages: 991
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The acoustic facies mapping and analyses from the interpretation and correlation of very high resolution seis- mic profiles, is a very useful tool for the characterization of the recent sedimentary processes and their distribution in the deep-sea environments. This work presents the first echo-character map of the Galicia Continental Margin and the adjacent abyssal plains. The map was carried out on the basis of the analysis and interpretation of the bathymetry and reflectivity data from the SIMRAD EM12, EM120 and EM1002 multibeam echosounders, and the high resolution seismic profiles from the SIMRAD TOPAS PS18 parametric echosounder. Based on the seafloor morphology, backscatter and acoustic echo-charac- ters, 26 echo types were identified in the uppermost sedimentary sequence. These echo-types have been classified into four main groups: Distinct, Irregular, Hyperbolic and Undulated echoes. This information has been acquired in the framework of the ‘Scientific Research Program of the Economic Exclusive Zone of Spain’, which is coordinated by the Defense Ministry, during the oceanographic cruises carried out on board of the R/V Hesperides in 2001 to 2003 and 2006 to 2009.