History of Sedimentation on the Yermak Plateau during the Recent 190 ka: Communication 2. Paleoceanographic Interpretation |
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| Authors: | Levitan M A Musatov E E Burtman M V |
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| Institution: | (1) Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI), Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia;(2) Institute of the Lithosphere of Marginal Seas, St. Petersburg Branch, Russian Academy of Sciences, Angliiskii pr. 1, 190121, Russia;(3) Shirshov Institute of Oceanology (SIO), Russian Academy of Sciences, Nakhimovskii pr. 36, Moscow, 117851, Russia |
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| Abstract: | Provenances for the lithogenic part of the sandy fraction of sediments on the Yermak Plateau are located in northern Eurasia. Based on the study of heavy minerals, new indicators are proposed for the ice-rafted material and main systems of surficial water circulation (gyres of the Beaufort Sea and Polar and Siberian currents of the Transpolar drift). Interpretation of the grain size distribution of sediments of warm and cold stages is based on difference in mechanisms of sedimentary material introduction into sea ice. Episodes of the influx of Atlantic warm and saline waters via the Fram Strait into the Arctic Ocean are reconstructed based on CaCO3 content. The relationship between sedimentary materials transported by icebergs and sea ice during the last 190 ka is given. Hypotheses of the history of surficial circulation in the Arctic Ocean and discharges of Siberian rivers during this period are presented. |
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