Abstract
The occurrence of gas accumulations in the Ria de Vigo (NW Spain) have been characterized by the authors in previous research. Pockmarks frequently appear on seismic and sonar records, covering ca. 45% of the sea-floor of the study area, which indicates that gas expulsion is not an uncommon phenomena in the coastal Ria environment. Here we report the occurrence of gas seepage for the first time along the coast of NW Spain. Side-scan sonar, echo-sounder and high-resolution seismic techniques, were used for mapping gas-expulsion features. Some expulsion pockmarks sit over elongated features that represent bottom marks created by anthropogenic activity. Thus, these anthropogenic sites may act as preferential venting zones for gas, as well as being potential hazards on a muddy sea-bed such as that of the Ria where gas accumulates just below the surface of the sea-floor.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
