Pockmarks: Submarine vents of natural gas or freshwater seeps? |
| |
| Authors: | M J Whiticar F Werner |
| |
| Institution: | 1. Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, 3000, Hannover 51, Federal Republic of Germany
2. Geologisches Institut der Universit?t Kiel, Olshausenstr, 40/60, 2300, Kiel, Federal Republic of Germany
|
| |
| Abstract: | Shallow depressions (pockmarks) in recent sediments of the western Baltic Sea were investigated as the possible surface expression
of a deeper-seated hydrocarbon reservoir or a submarine freshwater discharge. Hydrocarbon gases extracted from the recent
sediments associated with pockmarks had molecular and isotopic compositions different from those in the deeper Schwedeneck
field. Salinities in the vicinity of the pockmarks decreased from brackish Baltic seawater to freshwater conditions with depth.
Freshwater outflow from underlying glacial sediment aquifers is the likely cause of these pockmarks. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
