caa a22 4500 475827422 CHVBK 20180406123832.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/s005310000130 doi (NATIONALLICENCE)springer-10.1007/s005310000130 Variations of continental discharge pattern in space and time: implications from the Laptev Sea continental margin, Arctic Siberia [Elektronische Daten] [Hans Peter Kleiber, Frank Niessen] Abstract.: Variations in sediment input and distribution to the Laptev Sea continental margin during the Holocene and Termination I could be identified based on radiocarbon dated magnetic susceptibility logs and sediment thickness in high-resolution seismic profiles. Magnetic susceptibility of surface samples reveals an increased input of magnetic grains to the Laptev Sea deriving from the Anabar and Khatanga river catchments. Exposed magnetite schists and volcanic rocks of the Anabar shield and Putoran Plateau, respectively, function as major source of magnetic material. The distribution of magnetic susceptibility in association with the thickness of the Holocene sediments indicates bottom-current induced sediment transport guided by major submarine valleys on the Laptev Sea shelf. The sites of filled paleoriver channels identified in the seismic profiles suggest that during the Late Weichselian sea-level lowstand river runoff continued through four of the major valleys on the exposed Laptev Sea shelf. The sediments at the top of the lowstand deposits in front of the Anabar-Khatanga valley, represented in the seismic profiles by prograding deltas, are characterized by outstandingly high magnetic susceptibility values. Radiocarbon datings approximate the deposition of these high magnetic sediments between 10 and 13.4ka. It is suggested that this increased input of magnetic material is related to the deglaciation of the Anabar shield and the Putoran Plateau and thus support their glaciation during marine isotope stage (MIS) 2. Springer-Verlag, 2000 Laptev Sea Arctic Ocean Late Weichselian Holocene River discharge Magnetic susceptibility High-resolution seismic nationallicence Kleiber Hans Peter Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Postfach 120161, 27515 Bremerhaven, Germany aut Niessen Frank Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Postfach 120161, 27515 Bremerhaven, Germany aut https://doi.org/10.1007/s005310000130 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005310000130 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kleiber Hans Peter Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Postfach 120161, 27515 Bremerhaven, Germany aut NATIONALLICENCE 700 1- Niessen Frank Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Postfach 120161, 27515 Bremerhaven, Germany aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer