Gas somero en el margen continental Ibérico
- García Gil, Soledad
- Cartelle Álvarez, Víctor
- Blas Varela, Esther de
- Carlos Villamarín, Alejandro de
- Díez Arenas, Raquel
- Durán Gallego, Ruth
- Fernández Ferrín, Carlos Alberto
- García Moreiras, Iria
- García García, Ana
- Martínez Carreño, Natalia
- Muñoz Sobrino, Castor
- Ramírez Pérez, Alexandra María
- Iglesias Crespo, Jorge
ISSN: 0366-0176
Ano de publicación: 2015
Título do exemplar: Procesos geológicos en el margen continental ibérico: nuevos avances y tendencias
Volume: 126
Número: 2-3
Páxinas: 575-608
Tipo: Artigo
Outras publicacións en: Boletín geológico y minero
Resumo
The shallow gas reservoirs in marine sediments from the Iberian margin or their escapes can be detected by using direct methods: (1) the measurement of high concentrations of methane or other hydrocarbons in the water column or sediment cores, (2) the identification of chemosynthetic communities and/or authigenic carbonates in the seafloor, and (3) identification (using underwater videos) of pockmarks or carbonate mounds and mud volcanoes associated with the fluid escapes; or by indirect technical characterization of anomalies in acoustic records such as: (1) the presence of acoustic plumes in echo-sounders records, (2) the identification of acoustic blanking and/or acoustic turbidity in the high resolution seismic records, (3) the interpretation of reflectivity and (4) morphologies of pockmarks or seamounts in sidescan sonar and multibeam echo sounder records. This article is a compilation of acoustic-seismic, sedimentologic and morphologic evidence associated to the presence of shallow gas (accumulations or escapes) that appear in the Iberian margin and that have been published in various papers. The description is divided into geographical sectors, beginning in the north-eastern end of the Mediterranean margin and ending at the easternmost area of the Cantabrian margin, following a clockwise direction around the Iberian Peninsula