Sedimentology on cores off the South Orkney Plateau ...

• Main Author: Grünig, Sigrun
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1991
• Subjects: Piston corer Meischner small; Giant box corer; Gravity corer Kiel type; ANT-II/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; South Orkney Plateau; Weddell; Weddell Sea; Antarc*; Antarctica; Antarktis*
• Online Access: https://dx.doi.org/10.1594/pangaea.860528; https://doi.pangaea.de/10.1594/PANGAEA.860528

Grab samples and cores for sedimentological studies were retrieved along a N-S transect of the South Orkney Plateau margin. On the basis of morphology, the margin has been subdivided into shelf, upper continental slope, and a lower slope region cut by basins and ridges.Grain size, Sand component, and clay mineralogy were determined as well as water, organic carbon and carbonate contents. In addition, vane shear strength, magnetic intensity and the proportion of ice-rafted debris were measured, dating was done by detailed magnetic stratigraphy, the biofluctuation of the radiolarian Cycladophora davisiana and 230-Thorium analyses.Sediment facies distribution is controlled by numerous factors such as regional bathymetry and circulation, biogenic productivity, seasonal ice cover and the deposition of terrigenous detritus by ice-rafting, bottom water transport and/or slumping. The complex interrelationship between these factors results in three main categories of sediment facies. The diamict facies is interpreted ... : Supplement to: Grünig, Sigrun (1991): Quartäre Sedimentationsprozesse am Kontinentalhang des Süd-Orkney-Plateaus im nordwestlichen Weddellmeer (Antarktis) (Quaternary sedimentation processes on the continental margin of the South Orkney Plateau, NW Weddell Sea (Antarctica). Berichte zur Polarforschung = Reports on Polar Research, 75, 196 pp ...