Sedimentology and age models of cores from the Antarctic continental margin in the eastern Weddell Sea ...

• Main Authors: Grobe, Hannes, Mackensen, Andreas
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1992
• Subjects: gcmd1; timesliceagemodel; Gravity corer Kiel type; Giant box corer; MultiCorer; ANT-I/2; ANT-III/3; ANT-IV/3; ANT-V/4; ANT-VI/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctic; Ice Sheet; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.588236; https://doi.pangaea.de/10.1594/PANGAEA.588236

To reveal the late Quaternary paleoenvironmental changes at the Antarctic continental margin, we test a lithostratigraphy, adjusted to a stable isotope record from the eastern Weddell Sea. The stratigraphy is used to produce a stacked sedimentological data set of eleven sediment cores. We derive a general model of glacio marine sedimentation and paleoenvironmental changes at the East Antarctic continental margin during the last two climatic cycles (300 kyr).The sedimentary processes considered include biological productivity, ice-rafting, current transport, and gravitational downslope transport. These processes are controlled by a complex interaction of sea-level changes and paleoceanographic and paleoglacial conditions in response to changes of global climate and local insolation. Sedimentation rates are mainly controlled by ice-rafting which reflects mass balance and behaviour of the Antarctic ice sheet. The sedimentation rates decrease with distance from the continent and from interglacial to glacial. ... : Supplement to: Grobe, Hannes; Mackensen, Andreas (1992): Late Quaternary climatic cycles as recorded in sediments from the Antarctic continental margin. In: Kennett, James P & Warnke, Detlef A (eds.), The Antarctic Paleoenvironment: a perspective on Global Change, Antarctic Research Series, American Geophysical Union, DOI:10.1029/AR056p0349, 56, 349-376 ...