Organic geochemistry of Walvis Bay diatomaceous ooze—I. Occurrence and significance of the fatty acids |
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| Authors: | Jaap J Boon JW De Leeuw PA Schenck |
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| Institution: | Delft University of Technology, Department of Chemistry and Chemical Engineering, Organic Geochemistry Unit, Delft, The Netherlands |
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| Abstract: | Diatomaceous ooze of the shelf off Walvis Bay (S.W. Africa) was analysed for lipid material. The lipids from the sediment consist of a mixture of hydrocarbons, alcohols, ketones, fatty acids, sterols, carotenoid pigments and chlorophylls. The total fatty acid mixture has been analysed by capillary gas chromatography mass spectrometry and shown to consist of straight chain, iso-, anteiso- and isoprenoid acids. The environmental setting of the S.W. African shelf (Walvis Bay) makes it possible to discuss these fatty acids as markers for the fate of organic matter. The acids in the sediment point to a generation during passage of algal lipids through levels of microbial activity either on or slightly above the burial surface. |
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