Clay mineral records for the last two glaciations at the East Siberian continental margin ...

• Main Authors: Ye, Liming, Zhang, Weiyan, Wang, Rong, Yu, Xiaoguo, Jin, Lu
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2023
• Subjects: Arctic Ocean; clay mineral; East Siberian ice sheet; ice event; Chukchi; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.955002; https://doi.pangaea.de/10.1594/PANGAEA.955002

Four gravity sediment cores used for clay mineral analysis were recovered from the East Siberian continental margin. Core M04 (172.199W,75.982N ), with a length of 560 cm, was recovered from the Chukchi Basin during the fifth Chinese National Arctic Research Expedition (CHINARE) in 2012; core C22 (154.581W, 77.164N ), with a length of 200 cm, from the Northwind Ridge during the sixth CHINARE in 2014; and cores E23 (179.715E, 77.060N ) and P13 (159.865W, 77.991N ), with lengths of 354 cm and 246 cm from the southern Mendeleev Ridge and Chukchi Plateau, respectively, during the seventh CHINARE in 2017. The fine-grained fractions (<63 μm) of each sample were retained for clay mineral analysis. Decalcification and organic material removal were performed at room temperature with 1 M HCl and 30% H2O2, respectively. Clay fractions (<2 μm) were determined using Stokes’ law (Liu et al., 2010 and references therein). Each sample was oriented by wet smearing onto two glass slides before being air-dried. One of ...