Echo-character distribution in the Cantabrian Margin and the Biscay Abyssal Plain

Journal of Maps

José Luis Granja-Bruña¹  Alfonso Muñoz-Martín¹  María Gómez-Ballesteros²  Javier Navas³  Sandra Mink³  Mercedes Moreta³  Fernando Bohoyo³  María Druet³  Estefanía Llave³  Alba Gallastegui³  Fernando Fernández-Sáez³  Adolfo Maestro³  Manuel Catalán⁴ 

[1] Departamento de Geodinámica, Estratigrafía y Paleontología, Universidad Complutense de Madrid, Madrid, Spai;Instituto Español de Oceanografía, Madrid, Spai;Instituto Geológico y Minero de España, Madrid, Spai;Real Instituto y Observatorio de la Armada, Cádiz, Spai;

关键词: Bathymetry;    Cantabrian Margin;    echo-character;    parametric echo-sounder seismic profiles;    reflectivity;   

DOI  :  10.1080/17445647.2021.1973917

来源: Taylor & Francis

【 摘 要 】

In 2003, 2006–2009, 2014 and 2015, seven oceanographic cruises were carried out on board the Spanish R/V Hespérides in the Cantabrian Margin and the adjacent abyssal plains, covering an area of 219,124 km2. Based on the combined analysis and interpretation of the bathymetric and reflectivity data obtained with multibeam echo sounders (SIMRAD EM12, EM120 and EM1002), and ultra-high-resolution reflection seismic records acquired with the SIMRAD TOPAS PS18 parametric sounder, the mapping of the acoustic facies or echo-character at a scale of 1:1,200,000 has been carried out. Thirty types of echoes have been differentiated and gather into four main groups: Distinct, Irregular, Hyperbolic and Undulated. The echo-character depends on the acoustic response of the shallow sediment and the seabed morphology. Therefore, its analysis and characterization are basic for understanding recent and present-day sedimentary processes.

【 授权许可】

CC BY