Clay mineralogy of sediment cores from the Arctic Ocean ...

• Main Authors: Vogt, Christoph, Knies, Jochen
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: MultiCorer; Giant box corer; ARK-VIII/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Arctic Ocean; laptev; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.695350; https://doi.pangaea.de/10.1594/PANGAEA.695350

This study focuses on sedimentological investigations of sediment cores recovered during the international Arctic'91, expeditions with the German research ice breaker RV “Polarstern” to the European sector of the Arctic Ocean. Here, we deduce the last glacial/interglacial changes in transport mechanism and sedimentation from the clay mineral group smectite. We choose the smectites as an example of how sediment mineralogy can be linked with particular source regions (the Kara and Laptev seas), distinct transport mechanism (sea ice and surface currents) and sedimentation processes. Smectite contents in Arctic sediments discussed for two time slices, including the Last Glacial Maximum (LGM), and the last deglaciation (Termination I), reveal the highest variability subsequent to the retreat of the Eurasian ice sheets. Our results show that smectite anomalies in the Eurasian Basin are associated with distinct meltwater pulses and occurred around 13.5-13.0 14C ka B.P. Compelling evidence is provided that these ... : Supplement to: Vogt, Christoph; Knies, Jochen (2008): Sediment dynamics in the Eurasian Arctic Ocean during the last deglaciation - The clay mineral group smectite perspective. Marine Geology, 250(3-4), 211-222 ...