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Evidence of shallow- and deep-water gas hydrate destabilizations in North Atlantic polar continental margin sediments (1999)

Mienert, Jürgen ; Posewang, Jörg

Springer

Geo-marine letters 19 (1999), S. 143-149

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ISSN: 1432-1157

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences

Notes: Abstract Destabilization of gas hydrates from the North Atlantic polar continental margins is geophysically detectable within hydrate stability zones (HSZ). High-frequency seismic surveys of structures and propagation velocities of compressional waves have changed the classic conception of a consistently stable hydrate zone. The results are important in two respects: (1) unstable shallow-water gas hydrates can substantially contribute to the transfer of methane into the atmosphere, and (2) deep-water gas hydrates also indicate destabilization, which results in slope instability with probably only a secondary role in the transfer of methane to the atmosphere and thus in the greenhouse effect.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s003670050101

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