Abstract—
A comparative analysis of pore water composition using different methods of sampling from bottom sediments and permafrost rocks from Buor-Khaya Bay (Laptev Sea) was carried out. The principal differences in the concentration of macroions (Na+, K+, Ca2+, Mg2+, Cl–, and \({\text{SO}}_{4}^{{2 - }}\)) in pressed water compared to an water extract from intact and pressed samples are shown. During pressing, a significant amount of salts dissolved in pore water remain in the residual moisture. These are the main mineral components of seawater (Na+ and Cl–), as well as K+ and \({\text{SO}}_{4}^{{2 - }}\). The Ca2+ and Mg2+ concentrations in different pore water sampling methods is very diverse, and the general pattern in the distribution of these cations is suspicious. The variability in the concentration of macrocomponents in pore water using different sampling methods is apparently governed by differences in the lithological composition of the studied sediments and frozen rocks, the hydrological regime, and sedimentation regime in the studied part of Buor-Khaya Bay.
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Funding
The study was supported by the Russian Science Foundation (project no. 19-77-10 044) within the state task of IO RAS (topic no. 0128-2021-0005). Sample analysis techniques were developed within the state task of the Institute of Chemical Industry, Far East Branch, Russian Academy of Sciences (topic no. 0205-2021-0002).
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Ulyantsev, A.S., Polyakova, N.V., Trukhin, I.S. et al. Comparative Characterization of Techniques for Pore Water Sampling from Bottom Sediments and Permafrost Rocks from Buor-Khaya Bay (Laptev Sea). Oceanology 61, 736–741 (2021). https://doi.org/10.1134/S0001437021050131
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DOI: https://doi.org/10.1134/S0001437021050131