Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf
By using thermal mathematical modeling for the time range of 200–0 thousand years ago, the authors have been studying the role the glaciation, covered the De Long Islands and partly the Anjou Islands at the end of Middle Neopleistocene, played in the formation of permafrost and gas hydrates stabilit...
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ftdoajarticles:oai:doaj.org/article:1bc11de52e674ce0b301a05ee2a7e3ef 2023-05-15T15:08:31+02:00 Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf Anatoly Gavrilov Valentina Malakhova Elena Pizhankova Alexandra Popova 2020-12-01T00:00:00Z https://doi.org/10.3390/geosciences10120484 https://doaj.org/article/1bc11de52e674ce0b301a05ee2a7e3ef EN eng MDPI AG https://www.mdpi.com/2076-3263/10/12/484 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10120484 2076-3263 https://doaj.org/article/1bc11de52e674ce0b301a05ee2a7e3ef Geosciences, Vol 10, Iss 484, p 484 (2020) subsea permafrost Arctic shelf gas hydrate stability zone glacial area extraglacial conditions New Siberian Islands Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.3390/geosciences10120484 2022-12-31T06:04:08Z By using thermal mathematical modeling for the time range of 200–0 thousand years ago, the authors have been studying the role the glaciation, covered the De Long Islands and partly the Anjou Islands at the end of Middle Neopleistocene, played in the formation of permafrost and gas hydrates stability zone. For the modeling purpose, we used actual geological borehole cross-sections from the New Siberia Island. The modeling was conducted at geothermal flux densities of 50, 60, and 75 mW/m 2 for glacial and extraglacial conditions. Based on the modeling results, the glaciated area is characterized by permafrost thickness of 150–200 m lower than under extraglacial conditions. The lower boundary of the gas hydrate stability zone in the glacial area at 50–60 mW/m 2 is located 300 m higher than the same under extraglacial conditions. At 75 mW/m 2 in the area of 20–40 m isobaths, open taliks are formed, and the gas hydrate stability zone was destroyed in the middle of the Holocene. The specified conditions and events were being formed in the course of the historical development of the glacial area with a predominance of the marine conditions peculiar to it from the middle of the Middle Neopleistocene. Article in Journal/Newspaper Arctic De Long Islands New Siberian Islands permafrost New Siberia Siberia Directory of Open Access Journals: DOAJ Articles Arctic New Siberian Islands ENVELOPE(142.000,142.000,75.000,75.000) East Siberian Shelf ENVELOPE(-162.267,-162.267,74.400,74.400) De Long Islands ENVELOPE(153.000,153.000,76.500,76.500) Long Islands ENVELOPE(-93.035,-93.035,56.912,56.912) Geosciences 10 12 484 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
subsea permafrost Arctic shelf gas hydrate stability zone glacial area extraglacial conditions New Siberian Islands Geology QE1-996.5 |
spellingShingle |
subsea permafrost Arctic shelf gas hydrate stability zone glacial area extraglacial conditions New Siberian Islands Geology QE1-996.5 Anatoly Gavrilov Valentina Malakhova Elena Pizhankova Alexandra Popova Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
topic_facet |
subsea permafrost Arctic shelf gas hydrate stability zone glacial area extraglacial conditions New Siberian Islands Geology QE1-996.5 |
description |
By using thermal mathematical modeling for the time range of 200–0 thousand years ago, the authors have been studying the role the glaciation, covered the De Long Islands and partly the Anjou Islands at the end of Middle Neopleistocene, played in the formation of permafrost and gas hydrates stability zone. For the modeling purpose, we used actual geological borehole cross-sections from the New Siberia Island. The modeling was conducted at geothermal flux densities of 50, 60, and 75 mW/m 2 for glacial and extraglacial conditions. Based on the modeling results, the glaciated area is characterized by permafrost thickness of 150–200 m lower than under extraglacial conditions. The lower boundary of the gas hydrate stability zone in the glacial area at 50–60 mW/m 2 is located 300 m higher than the same under extraglacial conditions. At 75 mW/m 2 in the area of 20–40 m isobaths, open taliks are formed, and the gas hydrate stability zone was destroyed in the middle of the Holocene. The specified conditions and events were being formed in the course of the historical development of the glacial area with a predominance of the marine conditions peculiar to it from the middle of the Middle Neopleistocene. |
format |
Article in Journal/Newspaper |
author |
Anatoly Gavrilov Valentina Malakhova Elena Pizhankova Alexandra Popova |
author_facet |
Anatoly Gavrilov Valentina Malakhova Elena Pizhankova Alexandra Popova |
author_sort |
Anatoly Gavrilov |
title |
Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
title_short |
Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
title_full |
Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
title_fullStr |
Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
title_full_unstemmed |
Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf |
title_sort |
permafrost and gas hydrate stability zone of the glacial part of the east-siberian shelf |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/geosciences10120484 https://doaj.org/article/1bc11de52e674ce0b301a05ee2a7e3ef |
long_lat |
ENVELOPE(142.000,142.000,75.000,75.000) ENVELOPE(-162.267,-162.267,74.400,74.400) ENVELOPE(153.000,153.000,76.500,76.500) ENVELOPE(-93.035,-93.035,56.912,56.912) |
geographic |
Arctic New Siberian Islands East Siberian Shelf De Long Islands Long Islands |
geographic_facet |
Arctic New Siberian Islands East Siberian Shelf De Long Islands Long Islands |
genre |
Arctic De Long Islands New Siberian Islands permafrost New Siberia Siberia |
genre_facet |
Arctic De Long Islands New Siberian Islands permafrost New Siberia Siberia |
op_source |
Geosciences, Vol 10, Iss 484, p 484 (2020) |
op_relation |
https://www.mdpi.com/2076-3263/10/12/484 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10120484 2076-3263 https://doaj.org/article/1bc11de52e674ce0b301a05ee2a7e3ef |
op_doi |
https://doi.org/10.3390/geosciences10120484 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
12 |
container_start_page |
484 |
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1766339867932884992 |