Grain size and description on gravity core samples from ANT-IV/2 expedition to the Bransfield Strait ...

• Main Authors: van Enst, J W, Laban, C
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: Gravity corer Kiel type; ANT-IV/2; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Alfred Wegener Institute; Antarktis*; Bransfield Strait; Low Island
• Online Access: https://dx.doi.org/10.1594/pangaea.738447; https://doi.pangaea.de/10.1594/PANGAEA.738447

From the above and the grafical results it can be concluded that cores in the research area are locally dominated by turbiditic sequences, which can be observed by a strong increase in coarser sediment (>35 µm). These coarser intercalations are lacking in the vicinity of basaltic seamounts, probably due to a shadowing effect of the seamounts. The infill of the King George Basin might be dominated by a north eastern current. Sedimentary structures as observed in the cores are often lacking or vague due to hydrothermal effects (Suess, L, 1986). ... : This report presents the results of a granulometric research on nine gravity cores from the King George Basin and a basin near Low Island in the Bransfield Strait. The cores were taken during the Antarktis IV /2 expedition November 1985 with the RV "Polarstern" of the Alfred Wegener Institute for Polar and Marine Research, Bremerhaven. The RGD was allowed by professor Dr. E. Suess of the School op Oceanographics of the Oregon State University in Corvallis to describe and subsample the cores. The results of the on board descriptions and grain size analyses will be briefly discussed.Core descriptions: the nine cores were mainly taken in the central part of the King George Basin. The core positions are indicated on the map (see further details). The centre of the King George Basin can be described as a sedimentary basin with a relatively flat bottom and a waterdepth of approximately 1950 m. Locally basaltic seamounts can be found in the area. The cored sediments are mainly glaciomarine hemipelagic and ...