caa a22 4500 475827481 CHVBK 20180406123832.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/s005310000112 doi (NATIONALLICENCE)springer-10.1007/s005310000112 Variability of fluvial sediment supply to the Laptev Sea continental margin during Late Weichselian to Holocene times: implications from clay-mineral records [Elektronische Daten] [Claudia Müller, Ruediger Stein] Abstract.: Three sediment cores from the Laptev Sea continental margin were investigated for their clay mineralogy by X-ray diffraction to study the fluvial sediment supply since the late Weichselian. In the study area, the clay-mineral composition of surface sediments is characterized by distinct regional variations. The source area for smectite in the eastern Eurasian Basin is the Putoran Plateau drained by the Khatanga and Yenisei rivers. Currents caused by river discharge and the inflow of Atlantic water masses along the Eurasian continental margin are responsible for sediment distribution. In the sediment cores, smectite and illite contents show an opposite trend which mainly results from variable smectite supply. During MIS 2 the amount of smectite on the Laptev Sea continental margin never exceeds 10rel.%. Probably, reduced river discharge and the lowered sea level during MIS 2 caused a decreased sediment supply to the Laptev Sea. Additionally, the Putoran Plateau was covered by an ice sheet during the Late Weichselian preventing the erosion of smectite-rich soils. In contrast, maximum smectite contents (up to 30rel.%) in Holocene sediments result from increased sediment input by the Khatanga River and from the Kara Sea through the Vilkitsky Strait and via St. Anna Trough into the western Laptev Sea. Springer-Verlag, 2000 Arctic Ocean Siberia Laptev Sea Clay mineralogy Smectite Late Weichselian Holocene River discharge Atlantic water inflow nationallicence Müller Claudia Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut Stein Ruediger Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut https://doi.org/10.1007/s005310000112 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005310000112 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Müller Claudia Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut NATIONALLICENCE 700 1- Stein Ruediger Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer