A high-resolution sedimentology and age determination of core PS2185 from the central Arctic Ocean

• Main Authors: Spielhagen, Robert F, Bonani, Georges, Eisenhauer, Anton, Frank, Martin, Frederichs, Thomas, Kassens, Heidemarie, Kubik, Peter W, Mangini, Augusto, Nørgaard-Pedersen, Niels, Nowaczyk, Norbert R, Schäper, Stefan, Stein, Ruediger, Thiede, Jörn, Tiedemann, Ralf, Wahsner, Monika
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 1997
• Subjects: ARK-VIII/3; AWI_Paleo; GEOMAR; Giant box corer; GIK/IfG; GKG; Helmholtz Centre for Ocean Research Kiel; Institute for Geosciences; Christian Albrechts University; Kiel; KAL; Kasten corer; Lomonosov Ridge; Arctic Ocean; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/186; PS19 ARCTIC91; PS2185-3; PS2185-6; Quaternary Environment of the Eurasian North; QUEEN; Arctic; Siberia
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.728693; https://doi.org/10.1594/PANGAEA.728693

A high-resolution multiparameter stratigraphy allows the identification of late Quaternary glacial and interglacial cycles in a central Arctic Ocean sediment core. Distinct sandy layers in the upper part of the otherwise fine-grained sediment core from the Lomonosov Ridge (lat 87.5°N) correlate to four major glacials since ca. 0.7 Ma. The composition of these ice-rafted terrigenous sediments points to a glaciated northern Siberia as the main source. In contrast, lithic carbonates derived from North America are also present in older sediments and indicate a northern North American glaciation since at least 2.8 Ma. We conclude that large-scale northern Siberian glaciation began much later than other Northern Hemisphere ice sheets.