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Pleistocene permafrost of West Siberia as a deformable glacier bed

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  • V. I. Astakhov
  • F. A. Kaplyanskaya
  • V. D. Tarnogradsky

Abstract

Subglacial permafrost is usually referred to as a factor impeding basal glacial processes, and the deformation of soft substrata in particular. In West Siberian, widespread glacial disturbances present in permafrost of Pleistocene age suggest that frozen sediments, if clayey and/or icy, can readily deform, thus translating basal glacial stress into sliding of the entire glacier/sediment complex along subglacial shear zones. Ductile deformations such as folds and diapirs are also widespread. The mode of deformation of frozen subglacial sediments is dependent on their lithology, ice content and temperature conditions. Signatures of former subglacial permafrost in currently thawed sediments are deduced from contrasting deformation behaviours of lithologically different sedimentary formations.

Suggested Citation

  • V. I. Astakhov & F. A. Kaplyanskaya & V. D. Tarnogradsky, 1996. "Pleistocene permafrost of West Siberia as a deformable glacier bed," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 7(2), pages 165-191, April.
    • Handle: RePEc:wly:perpro:v:7:y:1996:i:2:p:165-191
    DOI: 10.1002/(SICI)1099-1530(199604)7:23.0.CO;2-S
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    Cited by:

    1. Julian B. Murton, 2021. "What and where are periglacial landscapes?," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 32(2), pages 186-212, April.
    2. H. Patton & A. Hubbard & J. Heyman & N. Alexandropoulou & A. P. E. Lasabuda & A. P. Stroeven & A. M. Hall & M. Winsborrow & D. E. Sugden & J. Kleman & K. Andreassen, 2022. "The extreme yet transient nature of glacial erosion," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    3. Maxim M. Arzhanov & Valentina V. Malakhova & Igor I. Mokhov, 2020. "Modeling thermal regime and evolution of the methane hydrate stability zone of the Yamal peninsula permafrost," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 31(4), pages 487-496, October.

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