Distribution of heavy minerals in sediment cores from the Laptev Sea continental margin and the central Arctic Ocean ...

• Main Author: Behrends, Marion
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2003
• Subjects: Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Arctic Ocean; Arktis*; Fram Strait; laptev; Laptev Sea; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.866938; https://doi.pangaea.de/10.1594/PANGAEA.866938

Focussing on heavy-mineral associations in the Laptev-Sea continental margin area and the eastern Arctic Ocean, 129 surface sediment samples, two short and four long gravity cores have been studied.By means of the accessory components, heavy-mineral associations of surface sediment samples from the Laptev-See continental slope allowed the distinction into two different mineralogical provinces, each influenced by fluvial input of the Siberian river Systems. Transport pathways via sea ice from the shallow shelf areas into the Arctic Ocean up to the final ablation areas of the Fram Strait can be reconstructed by heavy-mineral data of surface sediments from the central Arctic Ocean. The shallow shelf of the Laptev Sea seems to be the most important source area for terrigenous material, as indicated by the abundant occurence of amphiboles and clinopyroxenes. Underneath the mixing Zone of the two dominating surface circulation Systems, the Beaufort- Gyre and Transpolar-Drift system, the imprint of the Amerasian ... : Supplement to: Behrends, Marion (1999): Rekonstruktion von Meereisdrift und terrigenem Sedimenteintrag im Spätquartär: Schwermineralassoziationen in Sedimenten des Laptev-See-Kontinentalrandes und des zentralen Arktischen Ozeans (Reconstruction of sea-ice drift and terrigenous sediment supply in the Late Quaternary: Heavy-mineral associations in sediments of the Laptev Sea continental margin and the central Arctic Ocean). Berichte zur Polarforschung = Reports on Polar Research, 310, 167 pp ...