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Détails bibliographiques
Auteurs principaux: Marlow, J R, Farrimond, Paul, Rosell-Melé, Antoni
Format: Dataset Open Access
Langue:en
Publié: PANGAEA 2001
Sujets:
175-1084A; Accumulation rate, calcium carbonate; Accumulation rate, total organic carbon; AGE; Benguela Current, South Atlantic Ocean; Calcium carbonate; Calculated, see reference(s); Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Element analyser CHN, LECO; Joides Resolution; Leg175; Lithologic unit/sequence; Ocean Drilling Program; ODP; Sample code/label; Sedimentation rate; Sulfur, total
Accès en ligne:https://doi.org/10.1594/PANGAEA.198765
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Table des matières:
  • The major biomarker compounds in surface (0.95 meters below seafloor [mbsf]) and deep (579.92 mbsf) sediment samples from the Benguela Current coastal upwelling system off Lüderitz, Namibia (Leg 175 Hole 1084A), have been identified and quantified. Lipids of marine origin (especially long-chain alkenones) dominate the solvent-soluble extracts of both samples with minor constituents of terrestrially derived lipids. The paleoenvironmental significance of the more labile biomarker distributions (sterols) is limited by losses from depth-related diagenetic transformations. These losses may have led to the relative enrichment of the more refractory biomarkers (alkenones) with depth.

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