Schleusner, Philipp; Biskaborn, Boris K; Kienast, Frank; Wolter, Juliane; Subetto, Dmitry A; Diekmann, Bernhard (2015): (Figure 3) Sedimentological and biogeochemical analyses of outcrop PG2038-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.833692, In supplement to: Schleusner, P et al. (2015): Basin evolution and palaeoenvironmental variability of the thermokarst lake El'gene-Kyuele, Arctic Siberia. Boreas, 44(1), 216-229, https://doi.org/10.1111/bor.12084
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Project(s):
Permafrost Research (Periglacial Dynamics) @ AWI (AWI_PerDyn)
Coverage:
Latitude: 71.297430 * Longitude: 125.553570
Date/Time Start: 2010-08-31T00:00:00 * Date/Time End: 2010-08-31T00:00:00
Minimum DEPTH, sediment/rock: 0.1 m * Maximum DEPTH, sediment/rock: 3.5 m
Event(s):
PG2038-1 * Latitude: 71.297430 * Longitude: 125.553570 * Date/Time: 2010-08-31T00:00:00 * Elevation: 157.0 m * Recovery: 3.5 m * Location: Elgene Kyuele, Sibiria, Russia * Campaign: RU-Land_2010_Lena (Lena2010) * Basis: AWI Arctic Land Expedition * Method/Device: Grab (GRAB) * Comment: Material: Peat & Silty Gyttja
Comment:
X-ray diffractometry - For information about the mineral contents, the samples were ground and analysed by X-ray diffractometry (XRD) using a Panalytic Empyrean X-ray diffractometer. The mineral peak area intensities were determined graphically and calculated using Macdiff (Petschick 2012). Following Vogt (2009), the semi-quantitative mineral contents were determined by the ratio of the individual peak intensities against each other. Here we used the ratio of the quartz- and feldspar peaks, and the ratio of the illite peak against the total peak area intensities of all minerals (TI).
Grain-size distribution - The samples were pretreated with acetic acid to remove the inorganic carbon. In order to destroy the organic compounds, a hydrogen peroxide treatment was conducted on a platform shaker, where ammonia was used for neutralization of the pH. The sample material was dispersed and homogenized on an overhead shaker using tetrasodium pyrophosphate. The grain-size distribution was measured using a Beckmann Coulter LS 200 laser particle analyser.
Biogeochemistry - Total carbon (TC) and nitrogen contents were measured simultaneously using an elemental analyser (Elementar Vario EL III). The ground and freeze-dried samples were combusted in zinc capsules together with a spatula tip of tungsten oxide as a catalyst. The total organic carbon (TOC) contents were measured thereafter using an Elementar Vario MAX C analyser. Following Meyers & Teranes (2001), the TOC/N ratios (given in weight-%) were multiplied by the ratio of the atomic weights of carbon and nitrogen in order to obtain the atomic mass ratios (TOC/N atomic). For analysis of stable carbon isotopes of TOC, the samples were freed of inorganic carbon by hydrochloric acid, and measured using a Finnigan Delta-S mass spectrometer. The results are expressed as d13C values relative to the PDB standard in parts per mil notation (per mil).
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
665 data points