Subsea Permafrost Thawing as a Factor of Changes in the Elemental Composition
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The differences in the concentration of elements between thawed and frozen sediments were shown in the samples from two boreholes from the coastal zone of the Laptev Sea (Buor-Khaya Bay). The thalassogenic nature of enrichment of thawed deposits with sodium, chlorine, and to a lesser degree sulfur and phosphorus was confirmed. The difference in the concentration of chlorine between thawed and frozen soils may reach two orders.
The field studies were carried out with the support of the Government of the Russian Federation (contract no. 14.Z50.31.0012) and by the Russian Science Foundation (grant no. 14-50-00095). Material processing and analyses were performed within the framework of the state task of the Institute of Oceanology, Russian Academy of Sciences (project no. 0149-2018-0005), with partial support of the Russian Foundation for Basic Research (project no. 16-05-00017).
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