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Doklady Earth Sciences

, Volume 482, Issue 2, pp 1357–1361 | Cite as

The Molecular Composition of Lignin as an Indicator of Subaqueous Permafrost Thawing

  • A. S. UlyantsevEmail author
  • N. A. Belyaev
  • S. Yu. Bratskaya
  • E. A. Romankevich
Geochemistry
  • 11 Downloads

Abstract

The concentration and molecular composition of phenols, lignin derivatives, were analyzed. The material for the study was sampled from bottom sediments and subaqueous perennial frozen rocks from a well drilled in the Buor-Khaya Gulf of the Laptev Sea. The analysis was undertaken on the basis of calculation of the molecular factor. The principal difference in the molecular composition of organic matter is shown. This difference is manifested in the decrease in the total concentration of the vanillic lignin derivatives in the thawed formations in comparison with the perennial frozen rocks. This phenomenon is explained by activation of the bacterial transformation of organic matter caused by thawing of the subaqueous permafrost. It was established that the weight percentage of lignin in the organic matter of the analyzed sediments is 17% Corg.

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. S. Ulyantsev
    • 1
    Email author
  • N. A. Belyaev
    • 1
  • S. Yu. Bratskaya
    • 2
  • E. A. Romankevich
    • 1
    • 3
  1. 1.Shirshov Institute of OceanologyRussian Academy of ScienceMoscowRussia
  2. 2.Institute of Chemistry, Far East BranchRussian Academy of SciencesVladivostokRussia
  3. 3.National Research Tomsk Polytechnic UniversityTomskRussia

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