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Schefuß, Enno; Versteegh, Gerard J M; Jansen, J H Fred; Sinninghe Damsté, Jaap S (2004): Lipid biomarkers in urface sediments of the Southeast Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.740090, Supplement to: Schefuß, E et al. (2004): Lipid biomarkers as major source and preservation indicators in SE Atlantic surface sediments. Deep Sea Research Part I: Oceanographic Research Papers, 51(9), 1199-1228, https://doi.org/10.1016/j.dsr.2004.05.002

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Abstract:
Surface sediments from the eastern South Atlantic were investigated for their lipid biomarker contents and bulk organic geochemical characteristics to identify sources, transport pathways and preservation processes of organic components. The sediments cover a wide range of depositional settings with large differences in mass accumulation rates. The highest marine organic carbon (OC) contributions are detected along the coast, especially underlying the Benguela upwelling system. Terrigenous OC contributions are highest in the Congo deep-sea fan. Lipid biomarker fluxes are significantly correlated to the extent of oxygen exposure in the sediment. Normalization to total organic carbon (TOC) contents enabled the characterization of regional lipid biomarker production and transport mechanisms. Principal component analyses revealed five distinct groups of characteristic molecular and bulk organic geochemical parameters. Combined with information on lipid sources, the main controlling mechanisms of the spatial lipid distributions in the surface sediments are defined, indicating marine productivity related to river-induced mixing and oceanic upwelling, wind-driven deep upwelling, river-supply of terrigenous organic material, shallow coastal upwelling and eolian supply of plant-waxes.
Coverage:
Median Latitude: -11.853257 * Median Longitude: 7.972342 * South-bound Latitude: -22.601700 * West-bound Longitude: 1.321700 * North-bound Latitude: -2.076700 * East-bound Longitude: 13.838300
Date/Time Start: 1989-10-15T03:24:00 * Date/Time End: 1989-11-16T22:05:00
Event(s):
Anker24 * Latitude: -6.033300 * Longitude: 12.566700 * Elevation: -5.0 m * Method/Device: Grab (GRAB) * Comment: Congo River estuary, (Eisma et al., 1978)
Anker26 * Latitude: -6.050000 * Longitude: 12.483300 * Elevation: -6.0 m * Method/Device: Grab (GRAB) * Comment: Congo River estuary, (Eisma et al., 1978)
T89-10 * Latitude: -2.076700 * Longitude: 1.321700 * Date/Time: 1989-10-15T03:24:00 * Elevation: -2088.0 m * Recovery: 0.15 m * Location: Southeast Atlantic * Campaign: NIOZ89 * Basis: Tyro * Method/Device: Box corer (BC)
Size:
4 datasets

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