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Steroidal ketones in the early diagenetic transformations of Δ5 sterols in different types of sediments

ContributorsMermoud, François; Wunsche, Laurent Francis; Vaucher-Clerc, Odette; Gulacar, Fazil; Buchs, Armand
Published inOrganic geochemistry, vol. 6, p. 25-29
Publication date1984-01
Abstract

Incubation experiments of cholesterol labelled with various isotopes (2H, 3H and 14C) were performed in two different types of sediment, one highly oxygenated and the other completely anoxic, to ascertain the presence and the role of steroidal ketones in the early diagenesis of unsaturated sterols. Two different pathways for the hydrogenation of cholesterol have been observed, depending on the oxygenation rate of the sediment. If the intermediacy of steroidal ketones is evident in the oxic sediments of Lake Léman (Switzerland), a direct reduction of the Δ5 double bond also occurs in the anoxic sediments of Motte Lake (France).

Keywords
  • Sterols
  • Stanols
  • Steroidal ketones
  • Lake sediments
  • Early diagenesis
  • Microbial transformations
Affiliation entities
Citation (ISO format)
MERMOUD, François et al. Steroidal ketones in the early diagenetic transformations of Δ5 sterols in different types of sediments. In: Organic geochemistry, 1984, vol. 6, p. 25–29. doi: 10.1016/0146-6380(84)90023-8
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Article (Published version)
accessLevelRestricted
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Commercial URLhttps://linkinghub.elsevier.com/retrieve/pii/0146638084900238
ISSN of the journal0146-6380
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