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Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada
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SYSNO ASEP 0368255 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada Author(s) Majorowicz, J. (CA)
Šafanda, Jan (GFU-E) ORCID, RID
Osadetz, K. (CA)Source Title Proceedings of the 7th international conference on gas hydrates. - Edinburgh : Heriot-Watt University, 2011 Pages s. 1-15 Number of pages 15 s. Publication form www - www Action ICGH - International conference on gas hydrates /7./ Event date 17.07.2011-21.07.2011 VEvent location Edinburgh Country GB - United Kingdom Event type WRD Language eng - English Country GB - United Kingdom Keywords gas hydrates ; permafrost ; Beaufort-Mackenzie Basin ; taliks Subject RIV DC - Siesmology, Volcanology, Earth Structure CEZ AV0Z30120515 - GFU-E (2005-2011) Annotation Beaufort Mackenzie (BMB) permafrost and methane gas hydrate (GH) occurrences appear paradoxical. Relict terrestrial permafrost and GH from the Pleistocene sea level lowstand are degrading slowly in response to marine transgression below the Beaufort Sea. In many onshore Mackenzie Delta (MD) locations, such as at the Mallik site, thick permafrost and GHs are also degrading slowly in response to Holocene ground surface temperature warming. In contrast, taliks commonly lacking GH indications are inferred below shallow lakes.Why should taliks form below shallow lakes while submarine permafrost and GHs persist? We compare models of talik, permafrost and GH behavior below such lakes and compare them to models of BMB GH occurrence to describe lacustrine inundation effects and the factors controlling the contrasting MD permafrost/GH and talik environments. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2012
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