Formation of gas-emission craters in northern west siberia: Shallow controls

Evgeny Mikhailovich Chuvilin, Natalia Sergeevna Sokolova, Boris Aleksandrovich Bukhanov, Dinara Anvarovna Davletshina, Mikhail Yurievich Spasennykh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Gas-emission craters discovered in northern West Siberia may arise under a specific combination of shallow and deep-seated permafrost conditions. A formation model for such craters is suggested based on cryological and geological data from the Yamal Peninsula, where shallow permafrost encloses thick ground ice and lenses of intra-and subpermafrost saline cold water (cryopegs). Additionally, the permafrost in the area is highly saturated with gas and stores large accumulations of hydrocarbons that release gas-water fluids rising to the surface through faulted and fractured crusts. Gas emission craters in the Arctic can form in the presence of gas-filled cavities in ground ice caused by climate warming, rich sources of gas that can migrate and accumulate under pressure in the cavities, intrapermafrost gas-water fluids that circulate more rapidly in degrading permafrost, or weak permafrost caps over gas pools.

Original languageEnglish
Article number393
JournalGeosciences (Switzerland)
Volume11
Issue number9
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Arctic permafrost
  • Crater
  • Cryopeg
  • Explosive gas emission
  • Ground ice
  • Ice-rich clay
  • Intrapermafrost cavity
  • Methane
  • Yamal Peninsula

Fingerprint

Dive into the research topics of 'Formation of gas-emission craters in northern west siberia: Shallow controls'. Together they form a unique fingerprint.

Cite this