Sedimentology on two core from the Bransfield Strait area ...

• Main Authors: Troll, Georg, Matthies, Dietmar, Hofstetter, Alfons, Skeries, Wolfgang
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Multiple investigations; ANT-III/3; Polarstern; Antarc*; Antarctic; Antarctic Peninsula; Antarctica; Bransfield Strait; Iceberg*; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.767567; https://doi.pangaea.de/10.1594/PANGAEA.767567

The raw material for these investigations are samples from marine (sub)surface sediments around the northern part of the Antarctic Peninsula. They had been sampled in the years 1981 to 1986 during several expeditions of the research vessels Meteor, Polarstern and Walther Herwig.83 box core, gravity core and dredge samples from the area of the Bransfield Strait, the Powell Basin and the northern Weddell Sea have been examined for their grain-size distribution, their mineralogical and petrographical composition. Silt prevails and its clay proportions exceed 25% wt. in water depths greater than 2000 m. The granulometrical results reveal some typical sedimentation processes within the area of investigation. While turbiditic processes together with sediment input from melting icebergs control the sedimentation in the Weddell Sea, the South Orkney Island Plateau and the Powell Basin, the fine grained material from Bransfield Strait mainly relies on marine currents in the shelf area. In addition, the direct ... : Supplement to: Troll, Georg; Matthies, Dietmar; Hofstetter, Alfons; Skeries, Wolfgang (1994): Recent and subrecent marine sediments of the North-Western Weddell Sea and the Bransfield Strait, Antarctica. Polarforschung, 62(2/3), 129-144 ...