title: Study of the anisotropy of frozen rocks at the Khanovei test site (Komi Republic) based on the data of controlled source radio-magnetotelluric soundings and electrical resistivity tomography
metadata.name: dc.contributor.author
metadata.value: Bobrov, Nikita Yu.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Shlykov, Arseny A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Saraev, Alexander K.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Isaev, Vladislav S.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Balakhnin, Andrey I.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2024-07-03T15:52:08Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2024-07-03T15:52:08Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2023-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Bobrov, N. Yu., Shlykov, A. A., Saraev, A. K., Isaev, V. S., Balakhnin, A. I. (2023). Study of the anisotropy of frozen rocks at the Khanovei test site (Komi Republic) based on the data of controlled source radio-magnetotelluric soundings and electrical resistivity tomography. Vestnik of Saint Petersburg University. Earth Sciences, 68 (4), 696–716. https://doi.org/10.21638/spbu07.2023.405 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2023.405
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/45660
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The results of a joint inversion of the data of controlled source radio-magnetotelluric soundings
  (CSRMT) and electrical resistivity tomography (ERT), obtained at the Khanovei permafrost
  test site near Vorkuta, are presented. The geological section in the work area is composed
  of Quaternary fluvio-glacial, lacustrine-glacial and alluvial deposits up to 60 m thick, overlying
  a sequence of sandstones, siltstones and mudstones of Permian age. The CSRMT survey
  was carried out using a grounded electrical line 480 m long as a source in the frequency range
  1–1000 kHz. The results of various inversion options were compared: 1) isotropic one-dimensional
  (1D) inversion of CSRMT data; 2) isotropic separate two-dimensional (2D) inversion
  of CSRMT and ERT data; 3) joint anisotropic 1D inversion of CSRMT and ERT data. Based
  on the results of a joint anisotropic inversion of CSRMT data in the far and intermediate zones
  of the source and ERT data, a vertical anisotropy associated with horizontal layering of frozen
  Quaternary clay deposits in the depth range from 2 to 15–20 m was revealed and its parameters
  (horizontal and vertical resistivity and anisotropy coefficient) were determined. On the
  geoelectric section obtained from the ERT data, the thickness of the anisotropic layer of frozen
  clayey deposits is significantly overestimated. The middle part of the section, in the depth
  range from 15–20 to 60–70 m, is characterized by relatively low resistivity values (tens of
  ohmmeters). This is consistent with the results of previous studies, which established that the
  upper part of the Permian sediments is in a thawed state and is fractured and water-saturated.
  A high-resistivity layer (hundreds of ohmmeters) was revealed at the base of the geoelecric
  section according to CSRMT data. A significant increase in the resistivity of Permian rocks
  with depth is confirmed by the data of vertical electrical soundings previously performed in
  the Khanovey area.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The research was funded by the Russian Science Foundation, project no. 21-47-04401 and the
  Research park of St. Petersburg State University “Center for Geo-Environmental Research and Modeling
  (GEOMODEL)”.
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: permafrost
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: anisotropy of electrical properties
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: electrical resistivity tomography
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: radio-magnetotelluric soundings
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: controlled source
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Study of the anisotropy of frozen rocks at the Khanovei test site (Komi Republic) based on the data of controlled source radio-magnetotelluric soundings and electrical resistivity tomography
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 78-98+Бобров.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/45660/1/78-98%2b%d0%91%d0%be%d0%b1%d1%80%d0%be%d0%b2.pdf
resources.format: Adobe PDF
resources.size: 4,1 MB