Grain size composition of sediment core PG2208

• Main Authors: Biskaborn, Boris K, Nazarova, Larisa B, Kröger, Tim, Pestryakova, Luidmila A, Syrykh, Ludmila S, Pfalz, Gregor, Herzschuh, Ulrike, Diekmann, Bernhard
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: AWI_Envi; AWI Arctic Land Expedition; COMPCORE; Composite Core; DEPTH; sediment/rock; diatoms; Grain size; Mastersizer 3000; Malvern Instrument Inc.; Lake Bolshoe Toko; Yakutia; Russia; Lake sediment core; lake sediment proxies; Paleo Modelling; PalMod; PG2208; Polar Terrestrial Environmental Systems @ AWI; RU-Land_2013_Yakutia; Siberia; Siberian Arctic; Size fraction < 0.002 mm; clay; Size fraction > 2 mm; gravel; Size fraction 0.0063-0.002 mm; fine silt; Size fraction 0.020-0.0063 mm; medium silt; Size fraction 0.063-0.002 mm; silt; mud; Size fraction 0.063-0.020 mm; coarse silt; Size fraction 0.200-0.063 mm; fine sand; Size fraction 0.630-0.200 mm; medium sand; Size fraction 2.000-0.063 mm; sand; Size fraction 2.000-0.630 mm; coarse sand; Yakutia2013; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.942075; https://doi.org/10.1594/PANGAEA.942075

Before conducting grain-size analysis, we treated 36 samples with hydrogen peroxide (30%), set on a platform shaker for 4–5 weeks to remove organic matter, while keeping the pH neutral using ammonia and acetic acid. After washing, sediment samples were treated with sodium pyrophosphate for dispersion and homogenization of the sediment suspension for a day. At least three measurements per sample were carried out using a laser diffraction particle size analyzer MASTERSIZER 3000. Their mean was used to estimate sand, silt, and clay fractions as sums of volume percentages between 2 and 63 mm, 63 and 2 mm, and <2 mm grain-size classes, respectively.