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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
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| one publication added to basket [209215] |
Sublacustrine mud volcanoes and methane seeps caused by dissociation of gas hydrates in Lake Baikal
Van Rensbergen, P.; De Batist, M.; Klerkx, J. ; Hus, R.; Poort, J.; Vanneste, M.; Granin, N.; Khlystov, O.; Krinitsky, P. (2002). Sublacustrine mud volcanoes and methane seeps caused by dissociation of gas hydrates in Lake Baikal. Geology (Boulder Colo.) 30(7): 631-634. dx.doi.org/10.1130/0091-7613(2002)030<0631:SMVAMS>2.0.CO;2
In: Geology. Geological Society of America: Boulder. ISSN 0091-7613; e-ISSN 1943-2682, meer
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| Author keywords |
gas hydrates; hydrothermal vents; Lake Baikal; methane; mud volcanoes; seepage |
| Auteurs | | Top |
- Van Rensbergen, P., meer
- De Batist, M., meer
- Klerkx, J.
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- Hus, R.
- Poort, J., meer
- Vanneste, M., meer
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- Granin, N.
- Khlystov, O.
- Krinitsky, P.
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| Abstract |
Four lake-floor seeps have been studied in the gas-hydrate area in Lake Baikal's South Basin by using side-scan sonar, detailed bathymetry, measurements of near-bottom water properties, heat-flow measurements, and selected seismic profiles in relation to results from geochemical pore-water analysis. The seeps at the lake floor are identified as methane seeps and occur in an area of high heat flow, where the base of the gas-hydrate layer shallows rapidly toward the vent sites from 400 m to 150 m below the lake floor. At the site of the seep, a vertical fluid conduit disrupts the sedimentary stratification from the base of the hydrate layer to the lake floor. The seeps are interpreted to result from local destabilization of gas-hydrate caused by a pulse of hydrothermal fluid flow along an active fault segment. This is the first time that methane seeps and/or mud volcanoes associated with gas-hydrate destabilization have been observed in a sublacustrine setting. The finding demonstrates the potential of tectonically controlled gas-hydrate destabilization to cause extreme pore-fluid overpressure and short-lived mud volcanism. |
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