title: Estimation of the permafrost thickness of the New Siberia Island based on geothermal data and numerical modeling
metadata.name: dc.contributor.author
metadata.value: Gavrilov, Anatolii V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Malakhova, Valentina V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Pizhankova, Elena I.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Popova, Alexandra A.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2024-07-03T15:34:17Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2024-07-03T15:34:17Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2023-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Gavrilov, A. V., Malakhova, V. V., Pizhankova, E. I., Popova, A. A. (2023). Estimation of the permafrost thickness of the New Siberia Island based on geothermal data and numerical modeling. Vestnik of Saint Petersburg University. Earth Sciences, 68 (4), 622–645. https://doi.org/10.21638/spbu07.2023.401 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2023.401
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/45656
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The current ideas about the permafrost thickness on the New Siberia Island are very ambiguous
  both in terms of forming factors and in its magnitude (from 240 to 370 m), and in general
  are based on the assumption of the Pliocene beginning of rock freezing. In the last 20 years,
  new data have been obtained on the history of the region’s development in the Neopleistocene.
  They include the long existence of the New Siberia Island in marine conditions, which
  excluded the rocks freezing at that time, as well as the development of glaciation in the Middle
  Neopleistocene. These data indicate a significantly later onset of freezing of the island, which
  correlates with the nonstationarity of the temperature field of the frozen strata. The authenticity
  of the data is debated. The article is devoted to assessing the thickness of permafrost in
  accordance with three possible scenarios, allowing to take into account different points of
  view on the geological development of the region. The assessment is made using numerical
  modeling of the formation of frozen strata over the past 200 thousand years. One scenario
  includes the existence of glaciation during the Middle Neopleistocene, while in the other two
  it is absent. The last two scenarios differ in the stratigraphic schemes used. The reliability of
  the scenarios is assessed based on a comparison of the modeling results for each of them with
  geothermal data in a well on the island of New Siberia, obtained in the 1970s. The comparison
  results show that only the version with the existence of a glacier is consistent with the geothermal
  data. According to the data obtained, freezing of the island began under the glacier at
  the end of the Middle Neopleistocene, which existed in coastal-marine conditions. The most
  active increase in the frozen strata thickness dates back to the late Neopleistocene due to the
  drainage of the island. The obtained result is in agreement with new data on the age of the main geological bodies of the region, as well as with the idea of the glaciotectonic nature of
  dislocations in the Cretaceous — Middle Neopleistocene rocks.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The study was carried out within the framework of the state assignment of the Laboratory of Geological
  Environment Protection of the Geological Faculty of Moscow State University (project no. 16555398) (in
  terms of constructing paleogeographic scenario) and with the support by the Ministry of Education and
  Science of the Russian Federation (NIOKTR no. 123081400010-2, the agreement no. 075-03-2023-506/1)
  (in terms of numerical modeling and scenario verification).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 68; Issue 4
metadata.lang: -
metadata.name: dc.subject
metadata.value: New Siberian Islands
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: scenario of geological development
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: glaciation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: glacioisostatic movements
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: permafrost
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: paleotemperature scenario
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: numerical modeling
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Estimation of the permafrost thickness of the New Siberia Island based on geothermal data and numerical modeling
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 4-27+Гаврилов.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/45656/1/4-27%2b%d0%93%d0%b0%d0%b2%d1%80%d0%b8%d0%bb%d0%be%d0%b2.pdf
resources.format: Adobe PDF
resources.size: 3,43 MB