Article ID Journal Published Year Pages File Type
6441735 Marine Geology 2013 19 Pages PDF
Abstract
The combined analysis of high resolution seismic profiles, sediment temperature, pore water salinity and hydrostatic pressure revealed: (1) a direct relationship between depth of free gas and hydrostatic pressure; and (2) a direct link between sediment temperature and number of acoustic plumes from seabed to water column; more acoustic plumes were detected in summer when the temperature of the sediment was higher than in winter, indicating a seasonal variation of seeps within the ría. Salinity showed no significant differences between sea bottom water and sediment pore water and was therefore not a major factor controlling gas-front variations.
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Physical Sciences and Engineering Earth and Planetary Sciences Geochemistry and Petrology
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