Gas hydrates along the northeastern Atlantic margin: possible hydrate-bound margin instabilities and possible release of methane
Mienert, J.; Posewang, J.; Baumann, M. (1998). Gas hydrates along the northeastern Atlantic margin: possible hydrate-bound margin instabilities and possible release of methane, in: Henriet, J.-P. et al. Gas hydrates: relevance to world margin stability and climate change. Geological Society Special Publication, 137: pp. 275-291. https://dx.doi.org/10.1144/GSL.SP.1998.137.01.22 In: Henriet, J.-P.; Mienert, J. (1998). Gas hydrates: Relevance to world margin stability and climate change. Geological Society Special Publication, 137. The Geological Society: London. ISBN 1-86239-010-X. 338 pp., more In: Hartley, A.J. et al. (Ed.) Geological Society Special Publication. Geological Society of London: Oxford; London; Edinburgh; Boston, Mass.; Carlton, Vic.. ISSN 0305-8719; e-ISSN 2041-4927, more |
| Keywords | Chemical compounds > Organic compounds > Hydrocarbons > Gas hydrates
Chemical compounds > Organic compounds > Hydrocarbons > Saturated hydrocarbons > Acyclic hydrocarbons > Methane
Instability
Plate margins
AE, East Atlantic [Marine Regions]; AE, North Atlantic [Marine Regions]
Marine/Coastal |
| Authors | | Top | - Mienert, J.
- Posewang, J.
- Baumann, M.
| | |
| Abstract | The presence of gas hydrates and free gas in oceanic sediments along the northeastern European Margin is documented in high-frequency near-vertical and wide-angle seismic reflection data. Shallow-water and deep-water gas hydrate instabilities can cause free gas to escape from oceanic sediments. Particularly, methane from shallow-water gas hydrate destabilization may then get transferred from the sediments into the water column, and eventually into the atmosphere. Deep-water gas hydrates are coincident with areas and depths of slope failures in continental margin sediments. Comparisons between seismicity and the potential hydrate distributions suggest a correlation between hydrate instability and margin instabilities along the north-eastern Atlantic Margin. |
|
