Geochemistry on sediment profile PS69/335 ...

• Main Authors: Monien, Patrick, Schnetger, Bernhard, Brumsack, Hans-Jürgen, Hass, H Christian, Kuhn, Gerhard
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Giant box corer; Gravity corer; ANT-XXIII/4; Polarstern; Impact of climate induced glacier melt on marine coastal systems, Antarctica IMCOAST/IMCONet; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarctic; Arctic; Deception Island; King George Island; Maxwell Bay; Antarc*; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.759993; https://doi.pangaea.de/10.1594/PANGAEA.759993

During RV Polarstern cruise ANT-XXIII/4 in 2006, a gravity core (PS69/335-2) and a giant box core (PS69/335-1) were retrieved from Maxwell Bay off King George Island (KGI). Comprehensive geochemical (bulk parameters, quantitative XRF, Inductively Coupled Plasma Mass Spectrometry) and radiometric dating analyses (14C, 210Pb) were performed on both cores. A comparison with geochemical data from local bedrock demonstrates a mostly detrital origin for the sediments, but also points to an overprint from changing bioproductivity in the overlying water column in addition to early diagenetic processes. Furthermore, ten tephra layers that were most probably derived from volcanic activity on Deception Island were identified. Variations in the vertical distribution of selected elements in Maxwell Bay sediments further indicate a shift in source rock provenance as a result of changing glacier extents during the past c. 1750 years that may be linked to the Little Ice Age and the Medieval Warm Period. Whereas no evidence ... : Supplement to: Monien, Patrick; Schnetger, Bernhard; Brumsack, Hans-Jürgen; Hass, H Christian; Kuhn, Gerhard (2011): A geochemical record of late Holocene paleoenvironmental changes at King George Island (maritime Antarctica). Antarctic Science, 23(3), 255-267 ...