Sedimentology of 2 profiles from the Scotia Sea ...

• Main Authors: Diekmann, Bernhard, Kuhn, Gerhard, Rachold, Volker, Abelmann, Andrea, Brathauer, Uta, Fütterer, Dieter K, Gersonde, Rainer, Grobe, Hannes
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2000
• Subjects: Gravity corer Kiel type; MiniCorer; Piston corer BGR type; ANT-X/5; ANT-XI/2; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctic; Antarctic Peninsula; Scotia Sea; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.732966; https://doi.pangaea.de/10.1594/PANGAEA.732966

Geochemical and mineralogical compositions of modern and Late Quaternary marine sediments from the Scotia Sea trace sources and transport paths of terrigenous sediment. We discuss downcore variations of compositional data of two sediment cores from the northern and southern Scotia Sea that correlate with fluctuations in magnetic susceptibility. Sediments were derived from very different sources at both localities, as revealed by contrasting clay-mineral assemblages. However, a common feature is the input of more basic and undifferentiated crustal material with the potential of high magnetic susceptibility during glacial periods, indicated by variable quartz/feldspar ratios and major, trace and rare earth elements. Terrigenous sediments mainly originate from nearby terrestrial sources or are introduced through interbasinal sediment transfer from adjacent seas. The observed temporal compositional variations have to be attributed to changes in the relative detrital contributions from the diverse source areas. ... : Supplement to: Diekmann, Bernhard; Kuhn, Gerhard; Rachold, Volker; Abelmann, Andrea; Brathauer, Uta; Fütterer, Dieter K; Gersonde, Rainer; Grobe, Hannes (2000): Terrigenous sediment supply in the Scotia Sea (Southern Ocean): response to Late Quaternary ice dynamics in Patagonia and on the Antarctic Peninsula. Palaeogeography, Palaeoclimatology, Palaeoecology, 162(3-4), 357-387 ...