Oxygen isotope composition of Late Pleistocene syngenetic ice wedges from the Seyakha yedoma, Eastern Yamal Peninsula

Variations in δ¹⁸О were measured in the samples of Late Pleistocene ice wedge, collected in 2016 on the shore of the Gulf of Ob, near the Seyakha settlement. The values of δ¹⁸О in the upper fragment of the ice wedge vary from –25.75 to –23.15‰. The amplitude of horizontal variations in δ¹⁸О at +15.2 m height is 1.49‰ (–23.41 to –24.9‰). The lower fragment of the ice wedge at +6 m height is characterized by a broader variation range of δ¹⁸O compared to the upper one: δ¹⁸О varies in the horizontal direction from –23.41 to –26.63‰