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Stratigraphic and structural control on the distribution of gas hydrates and active gas seeps on the Posolsky Bank, Lake Baikal

(2012) GEO-MARINE LETTERS. 32(5-6). p.395-406
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Organization
Abstract
The distribution and origin of shallow gas seeps in the vicinity of the Posolsky Bank in Lake Baikal were studied based on the integration of detailed seismic, multibeam, and hydro-acoustic water-column investigations. In all, 65 acoustic flares have been detected on the Posolsky Fault scarp near the crest of the bank and in a similar, nearby setting at water depths of -43 to -332 m. The seismic data reveal BSRs (bottom-simulating reflectors) occurring up to water depths of -300 m. Calculations involving hydrate stability, heat flow, and topographic modulation based on BSR occurrence and multibeam bathymetry enabled prediction of a methane-ethane gas mixture and heat-flow values that would account for gas hydrate stability in the lake sediments under prevailing ambient conditions. These predictions are supported by ground truth data. The findings suggest that seeps concentrated along the crest of the Posolsky Bank are fed mainly by gas coming from below the base of the gas hydrate stability zone, which would migrate updip via permeable stratigraphic pathways beneath the bank. Gas would ultimately be released into the water column where these pathways are cut off by faults.
Keywords
BOTTOM SEDIMENTS, METHANE ESCAPE, MUD VOLCANOS, BLACK-SEA, HEAT-FLOW, RIFT-ZONE, SIBERIA, DELTA, VARIABILITY, CONTEXT

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MLA
Naudts, Lieven, Oleg Khlystov, Nick Granin, et al. “Stratigraphic and Structural Control on the Distribution of Gas Hydrates and Active Gas Seeps on the Posolsky Bank, Lake Baikal.” GEO-MARINE LETTERS 32.5-6 (2012): 395–406. Print.
APA
Naudts, L., Khlystov, O., Granin, N., Chensky, A., Poort, J., & De Batist, M. (2012). Stratigraphic and structural control on the distribution of gas hydrates and active gas seeps on the Posolsky Bank, Lake Baikal. GEO-MARINE LETTERS, 32(5-6), 395–406.
Chicago author-date
Naudts, Lieven, Oleg Khlystov, Nick Granin, Alexander Chensky, Jeffrey Poort, and Marc De Batist. 2012. “Stratigraphic and Structural Control on the Distribution of Gas Hydrates and Active Gas Seeps on the Posolsky Bank, Lake Baikal.” Geo-marine Letters 32 (5-6): 395–406.
Chicago author-date (all authors)
Naudts, Lieven, Oleg Khlystov, Nick Granin, Alexander Chensky, Jeffrey Poort, and Marc De Batist. 2012. “Stratigraphic and Structural Control on the Distribution of Gas Hydrates and Active Gas Seeps on the Posolsky Bank, Lake Baikal.” Geo-marine Letters 32 (5-6): 395–406.
Vancouver
1.
Naudts L, Khlystov O, Granin N, Chensky A, Poort J, De Batist M. Stratigraphic and structural control on the distribution of gas hydrates and active gas seeps on the Posolsky Bank, Lake Baikal. GEO-MARINE LETTERS. 2012;32(5-6):395–406.
IEEE
[1]
L. Naudts, O. Khlystov, N. Granin, A. Chensky, J. Poort, and M. De Batist, “Stratigraphic and structural control on the distribution of gas hydrates and active gas seeps on the Posolsky Bank, Lake Baikal,” GEO-MARINE LETTERS, vol. 32, no. 5–6, pp. 395–406, 2012.
@article{3081824,
  abstract     = {The distribution and origin of shallow gas seeps in the vicinity of the Posolsky Bank in Lake Baikal were studied based on the integration of detailed seismic, multibeam, and hydro-acoustic water-column investigations. In all, 65 acoustic flares have been detected on the Posolsky Fault scarp near the crest of the bank and in a similar, nearby setting at water depths of -43 to -332 m. The seismic data reveal BSRs (bottom-simulating reflectors) occurring up to water depths of -300 m. Calculations involving hydrate stability, heat flow, and topographic modulation based on BSR occurrence and multibeam bathymetry enabled prediction of a methane-ethane gas mixture and heat-flow values that would account for gas hydrate stability in the lake sediments under prevailing ambient conditions. These predictions are supported by ground truth data. The findings suggest that seeps concentrated along the crest of the Posolsky Bank are fed mainly by gas coming from below the base of the gas hydrate stability zone, which would migrate updip via permeable stratigraphic pathways beneath the bank. Gas would ultimately be released into the water column where these pathways are cut off by faults.},
  author       = {Naudts, Lieven and Khlystov, Oleg and Granin, Nick and Chensky, Alexander and Poort, Jeffrey and De Batist, Marc},
  issn         = {0276-0460},
  journal      = {GEO-MARINE LETTERS},
  keywords     = {BOTTOM SEDIMENTS,METHANE ESCAPE,MUD VOLCANOS,BLACK-SEA,HEAT-FLOW,RIFT-ZONE,SIBERIA,DELTA,VARIABILITY,CONTEXT},
  language     = {eng},
  number       = {5-6},
  pages        = {395--406},
  title        = {Stratigraphic and structural control on the distribution of gas hydrates and active gas seeps on the Posolsky Bank, Lake Baikal},
  url          = {http://dx.doi.org/10.1007/s00367-012-0286-y},
  volume       = {32},
  year         = {2012},
}

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