Isotopic composition of oxygen and hydrogen in ice wedges from the third marine terrace near Lorino settlement on the eastern coast of Chukotka ...

• Main Authors: Budantseva, Nadine A, Maslakov, Alexey A, Vasil'chuk, Alla Constantinovna, Vasil'chuk, Yurij K, Kuzyakin, Lev P
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Eastern Chukotka; Holocene; Hydrogen isotopes; Ice wedges; oxygen isotopes; paleotemperature reconstructions; peatlands; radiocarbon age; Event label; Latitude of event; Longitude of event; Location; Comment; Identification; Year of sampling; Number of samples; δ18O, water, minimum; δ18O, water; δ18O, water, maximum; δ Deuterium, water, minimum; δ Deuterium, water; δ Deuterium, water, maximum; Deuterium excess, minimum; Deuterium excess; Deuterium excess, maximum; Mass-specrometer, Thermo Scientific, Finnigan Delta-V Plus; Calculated after Dansgaard 1964; Chukotka
• Online Access: https://dx.doi.org/10.1594/pangaea.965373; https://doi.pangaea.de/10.1594/PANGAEA.965373

The study's focus is on Early Holocene syngenetic ice wedges that are exposed in a polygonal peatland's outcrop in the topmost part of the third marine terrace, close to the Lorino village on Chukotka's eastern coast. The peatland accumulation near Lorino village started around 14-13 cal ka BP, at the end of the Younger Dryas, according to the radiocarbon dates that were collected. The active stage of peat accumulation ended around 10 cal ka BP. It is not unusual for peat accumulation to have started near the end of the Younger Dryas, before the Holocene's officially recognized lower limit (11.7 cal ka BP), and to have ended in the midst of the Holocene's Greenlandian stage. The reworking of ancient organic material during the erosion of the marine terrace sediments and separation of the allochthonous peat is most likely the cause of the age inversions in the peat observed along vertical profiles. In the peatland exposure, six fragments with ice wedges were studied between 2015 and 2021.The oxygen isotope ... : Data was submitted and proofread by Yurij K Vasil'chuk and Lyubov Bludushkina at the faculty of Geography, department of Geochemistry of Landscapes and Geography of Soils, Lomonosov Moscow State University. ...