Age determination, sedimentological, biogeochemical, and plant macrofossils analyses of outcrop PG2038-1 ...

• Main Authors: Schleusner, Philipp, Biskaborn, Boris K, Kienast, Frank, Wolter, Juliane, Subetto, Dmitry A, Diekmann, Bernhard
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2015
• Subjects: SibLake; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Ice; permafrost; Thermokarst; Tundra; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.833695; https://doi.pangaea.de/10.1594/PANGAEA.833695

Thermokarst lakes are a widespread feature of the Arctic tundra, in which highly dynamic processes are closely connected with current and past climate changes. We investigated late Quaternary sediment dynamics, basin and shoreline evolution, and environmental interrelations of Lake El'gene-Kyuele in the NE Siberian Arctic (latitude 71°17'N, longitude 125°34'E). The water-body displays thaw-lake characteristics cutting into both Pleistocene Ice Complex and Holocene alas sediments. Our methods are based on grain size distribution, mineralogical composition, TOC/N ratio, stable carbon isotopes and the analysis of plant macrofossils from a 3.5-m sediment profile at the modern eastern lake shore. Our results show two main sources for sediments in the lake basin: terrigenous diamicton supplied from thermokarst slopes and the lake shore, and lacustrine detritus that has mainly settled in the deep lake basin. The lake and its adjacent thermokarst basin rapidly expanded during the early Holocene. This climatically ... : Supplement to: Schleusner, Philipp; Biskaborn, Boris K; Kienast, Frank; Wolter, Juliane; Subetto, Dmitry A; Diekmann, Bernhard (2015): Basin evolution and palaeoenvironmental variability of the thermokarst lake El'gene-Kyuele, Arctic Siberia. Boreas, 44(1), 216-229 ...