Sedimentology on Quaternary depoits from the Weddell Sea continental slope ...

• Main Author: Bonn, Wolfgang J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: Gravity corer Kiel type; ANT-VI/3; ANT-VIII/6; ANT-IX/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Silicon Cycling in the World Ocean SINOPS; Antarc*; Antarctic; Antarktis*; Ice Sheet; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.729792; https://doi.pangaea.de/10.1594/PANGAEA.729792

Sedimentological, geochemical (in particular biogenic content) and physical properties from the Weddell, Lazarev and Cosmonaut seas along the Antarctic continental margin were analysed in order to reconstruct the late Quaternary productivity and sedimentary processes of this region. Seven undisturbed sediment cores were chosen. The sediments represent a depositional period from 400,000 years to the recent time.The late Quaternary climatic changes influence changes in the paleoenvironmental and the geological conditions, directly forced by the behaviour of the Antarctic ice sheet. All investigated cores are positioned within the oscillating ice sheet area and reflect the influence of the ice sheet in response to the climatic cycles.The organic carbon, carbonate, biogenic opal, and barium contents were measured, andlor calculated, together with the determination by XRD of the terrigenous components such as quartz and plagioclase (expressed as relative to corundum standard). The contents of organic carbon and ... : Supplement to: Bonn, Wolfgang J (1995): Biogenopal und biogenes Barium als Indikatoren für spätquartäre Produktivitätsänderungen am antarktischen Kontinentalhang, atlantischer Sektor (Biogenic opal and barium: Indicators for late Quarternary changes in productivity at the Antarctic continental margin, Atlantic Sector). Berichte zur Polarforschung = Reports on Polar Research, 180, 186 pp ...