Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada
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) location...
Main Authors: | , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2011
|
Subjects: | |
Online Access: | http://hdl.handle.net/11104/0202650 |
id |
ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0368255 |
---|---|
record_format |
openpolar |
spelling |
ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0368255 2024-02-11T10:02:30+01:00 Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada Majorowicz, J. Šafanda, J. (Jan) Osadetz, K. 2011 http://hdl.handle.net/11104/0202650 eng eng http://hdl.handle.net/11104/0202650 gas hydrates permafrost Beaufort-Mackenzie Basin taliks info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion 2011 ftczacademyscien 2024-01-16T17:14:50Z 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. Conference Object Beaufort Sea Mackenzie Basin Mackenzie Delta permafrost The Czech Academy of Sciences: Publication Activity (ASEP) Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Talik ENVELOPE(146.601,146.601,59.667,59.667) |
institution |
Open Polar |
collection |
The Czech Academy of Sciences: Publication Activity (ASEP) |
op_collection_id |
ftczacademyscien |
language |
English |
topic |
gas hydrates permafrost Beaufort-Mackenzie Basin taliks |
spellingShingle |
gas hydrates permafrost Beaufort-Mackenzie Basin taliks Majorowicz, J. Šafanda, J. (Jan) Osadetz, K. Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
topic_facet |
gas hydrates permafrost Beaufort-Mackenzie Basin taliks |
description |
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. |
format |
Conference Object |
author |
Majorowicz, J. Šafanda, J. (Jan) Osadetz, K. |
author_facet |
Majorowicz, J. Šafanda, J. (Jan) Osadetz, K. |
author_sort |
Majorowicz, J. |
title |
Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
title_short |
Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
title_full |
Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
title_fullStr |
Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
title_full_unstemmed |
Gas hydrates stability and the dynamics of taliks in the Mackenzie Delta, Canada |
title_sort |
gas hydrates stability and the dynamics of taliks in the mackenzie delta, canada |
publishDate |
2011 |
url |
http://hdl.handle.net/11104/0202650 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Canada Mackenzie Delta Talik |
geographic_facet |
Canada Mackenzie Delta Talik |
genre |
Beaufort Sea Mackenzie Basin Mackenzie Delta permafrost |
genre_facet |
Beaufort Sea Mackenzie Basin Mackenzie Delta permafrost |
op_relation |
http://hdl.handle.net/11104/0202650 |
_version_ |
1790598511496003584 |