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The use of hopanes to track in situ variations in petroleum composition in surface sediments

Le Dréau, Yveline and Gilbert, Franck and Doumenq, Pierre and Asia, Laurence and Bertrand, Jean-Claude and Mille, Gilbert The use of hopanes to track in situ variations in petroleum composition in surface sediments. (1997) Chemosphere, 34 (8). 1663-1672. ISSN 0045-6535

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Official URL: http://dx.doi.org/10.1016/S0045-6535(97)00023-4


Alterations in the composition of a Light Arabian crude oil has been studied in situ during 12 months in an artificially contaminated site. After 12 months of experimentation, C17/Pr and C18/Ph ratios could not be used, because the isoprenoïds were no longer stable. In contrast, a high degree of stability of biomarkers, especially hopanes, was observed. These are very useful tools to assess alterations in other less stable classes of saturated compounds (n-alkanes and isoprenoïds) contained in petroleum. Marked degradation of both n-alkanes and isoprenoïds (using 17α21β C30 hopane as “internal standard”) has been evidenced. The use of biomarkers also made it possible to observe a burying process which occurred down to 6 cm deep after 12 months of experimentation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0045653597000234
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Université de la Méditerranée - Aix-Marseille II (FRANCE)
Other partners > Université Paul Cézanne - Aix-Marseille III (FRANCE)
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Deposited On:11 Feb 2013 08:02

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