Clay mineral and heavy metal composition of sea-bed surface sediments and pre-Holocene sediment samples taken during POLARSTERN cruise ANT-XXIII/9 ...

• Main Authors: Borchers, Andreas, Voigt, Ines, Kuhn, Gerhard, Diekmann, Bernhard
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Andreas; Antarctic; Arctic; Indian; Kerguelen; Prydz Bay; Southern Ocean; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.847235; https://doi.pangaea.de/10.1594/PANGAEA.847235

Surface mineralogical compositions and their association to modern processes are well known from the east Atlantic and south-west Indian sectors of the Southern Ocean, but data from the interface of these areas - the Prydz Bay-Kerguelen region - is still missing. The objective of our study was to provide mineralogical data of reference samples from this region and to relate these mineralogical assemblages to hinterland geology, weathering, transport and depositional processes. Clay mineral assemblages were analysed by means of X-ray diffraction technique. Heavy mineral assemblages were determined by counting of gravity-separated grains under a polarizing microscope. Results show that by use of clay mineral assemblages four mineralogical provinces can be subdivided: i) continental shelf, ii) continental slope, iii) deep sea, iv) Kerguelen Plateau. Heavy mineral assemblages in the fine sand fraction are relatively uniform except for samples taken from the East Antarctic shelf. Our findings show that ... : Supplement to: Borchers, Andreas; Voigt, Ines; Kuhn, Gerhard; Diekmann, Bernhard (2011): Mineralogy of glaciomarine sediments from the Prydz Bay-Kerguelen region: relation to modern depositional environments. Antarctic Science, 23(2), 164-179 ...