Detriral flux of sediment cores in the southeast Indian Ocean ...

• Main Authors: Bareille, Gilles F, Grousset, Francis E, Labracherie, Monique, Labeyrie, Laurent D, Petit, Jean Robert
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1994
• Subjects: Piston corer; MD38; APSARA4; KERSIMAG; RC11; Marion Dufresne 1972; Robert Conrad; Antarctic; Indian; Kerguelen; Monique; Southern Ocean; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.733896; https://doi.pangaea.de/10.1594/PANGAEA.733896

Because of a close relationship between detrital flux variations and magnetic susceptibility (MS) flux (MS cm**3 of bulk sediment multiplied by the linear sedimentation rate) variations in the southeast Indian basin of the southern ocean, MS flux profiles have been used to examine the spatial and temporal detrital flux changes in this basin during the last climatic cycle. Results indicate a general increase in detrital material input during the coldest periods, suggesting a widespread phenomenon, at least on the basin scale. Mineralogical data, geochemical data, and 87Sr/86Sr isotopic ratios have been used to determine the origin and transport mechanisms responsible for increased detrital flux during glacial periods. Mineralogical and geochemical data show that these glacial 'highs' are due to increases in both Kerguelen-Crozet volcanic and Antarctic detrital inputs. The 87Sr/86Sr isotopic composition of the >45-µm fraction indicates that the Kerguelen-Crozet province contributes to at least 50% of the ... : Supplement to: Bareille, Gilles F; Grousset, Francis E; Labracherie, Monique; Labeyrie, Laurent D; Petit, Jean Robert (1994): Origin of detrital fluxes in the southeast Indian Ocean during the last climatic cycles. Paleoceanography, 9(6), 799-820 ...