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Pfeifer, Kerstin; Kasten, Sabine; Hensen, Christian; Schulz, Horst D (2001): Geochemistry of surface sediment samples from the South Atlantic Ocean [dataset]. PANGAEA,, Supplement to: Pfeifer, K et al. (2001): Reconstruction of primary productivity from the barium contents in surface sediments of the South Atlantic Ocean. Marine Geology, 177(1-2), 13-24,

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The aim of the present study is an evaluation of the applicability of biogenic barium as a proxy for productivity. For this purpose, 190 surface sediment samples from the South Atlantic Ocean were analysed for their barium and aluminium concentrations. Biogenic barium is estimated by subtracting the calculated terrigenous barium (obtained from the terrigenous Ba/Al ratio and the amount of Al in the sample) from the total Ba content in the sample. Based on the accumulation rates of biogenic barium, export production is estimated using three different algorithms proposed by [Paleoceanography 7 (1992) 163, doi:10.1029/92PA00181; Global Biogeochem. Cycles 9 (1995) 289, doi:10.1029/95GB00021; Geomar. Report 38 (1995) 105]. Primary productivity was calculated from these different export productions and compared with measurements of recent primary productivity in the overlying surface waters. Only the primary productions calculated on the basis of the algorithm of [Paleoceanography 7 (1992) 163, doi:10.1029/92PA00181] yield productivity values comparable to those existing in ocean surface waters. This study further reveals that it is not sufficient to use a constant, generally applicable organic carbon/biogenic barium ratio, as is postulated by [Global Biogeochem. Cycles 9 (1995) 289, doi:10.1029/95GB00021]. This ratio has to be assessed regionally. For the sediments of the Cape Basin in the eastern South Atlantic Ocean, a new algorithm is developed which gives plausible primary productivities for the overlying surface waters.
Related to:
Pfeifer, Kerstin (1998): Rekonstruktion der Primärproduktion aus Bariumgehalten in Oberflächensedimenten des Südatlantiks. Diploma Thesis, Fachbereich Geowissenschaften, Universität Bremen, Germany
Pfeifer, Kerstin (2003): Auswirkungen frühdiagenetischer Prozesse auf Calcit- und Barytgehalten in marinen Oberflächensedimenten: Modellierung von Lösung und Erhaltung. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 208, 110 pp, urn:nbn:de:gbv:46-ep000103296
Median Latitude: -19.692404 * Median Longitude: -19.341230 * South-bound Latitude: -48.386667 * West-bound Longitude: -60.091667 * North-bound Latitude: 7.343333 * East-bound Longitude: 15.480000
Date/Time Start: 1988-02-24T00:00:00 * Date/Time End: 1996-04-01T00:00:00
Minimum DEPTH, sediment/rock: 0.003 m * Maximum DEPTH, sediment/rock: 0.005 m
GeoB1013-2 * Latitude: -11.798683 * Longitude: 13.446317 * Date/Time: 1988-02-24T00:00:00 * Elevation: -250.0 m * Penetration: 0.48 m * Recovery: 0.46 m * Location: Walvis Ridge * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: Giant box corer (GKG) * Comment: Schlick, siltig, braun
GeoB1015-3 * Latitude: -11.773800 * Longitude: 12.838500 * Date/Time: 1988-02-24T00:00:00 * Elevation: -1650.0 m * Penetration: 0.38 m * Recovery: 0.38 m * Location: Angola Basin * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: Ton, olivgrün, Forams.
GeoB1018-2 * Latitude: -11.724967 * Longitude: 8.878017 * Date/Time: 1988-02-26T00:00:00 * Elevation: -4530.0 m * Penetration: 0.35 m * Recovery: 0.35 m * Location: Angola Basin * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: Tonschl., olivgrün, Forams.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Latitude of eventLatitude
2Longitude of eventLongitude
3Event labelEvent
4Elevation of eventElevationm
5DEPTH, sediment/rockDepth sedmGeocode
6TitaniumTi%Pfeifer, KerstinHF/HNO3/H2O2 pressure digestion
7AluminiumAl%Pfeifer, KerstinHF/HNO3/H2O2 pressure digestion
8ManganeseMn%Pfeifer, KerstinHF/HNO3/H2O2 pressure digestion
9BariumBamg/kgPfeifer, KerstinHF/HNO3/H2O2 pressure digestion
10CommentCommentPfeifer, Kerstin
840 data points

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