Limited double bond isomerisation and selective hydrogenation of sterenes during early diagenesis

Leeuw, J.W. de; Cox, H.C.; Graas, Ger van; Meer, F.W. van de; Peakman, Torren M.; Baas, J. M. A.; Graaf, B. van de

doi:10.1016/0016-7037(89)90034-3

Cited by 109 publications

(23 citation statements)

References 24 publications

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“…Under general geologic conditions, all kinds of sterenes were converted into saturated steranes through hydrogenation (for example, sterene→sterane, diasterene→diasterane, 4-methyl diasterene→4-methyl diasterane) (de Leeuw et al, 1989). The extensive occurrence of hydrogenation indicates that the olefinic bond was easily hydrogenated and reduced.…”

Section: Formation Pathway Of Sulfur-containing Steroids and The Hydrmentioning

confidence: 99%

Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag, Bohai Bay Basin, North China

Wang

Jiang

et al. 2013

Sci. China Earth Sci.

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High abundant sulfur-containing steroids were identified and detected in saturate hydrocarbon fractions of heavy oil with a high sulfur content in the Jinxian Sag, Bohai Bay Basin, North China. These sulfur-containing steroids were structurally merged into the D-ring of steroid nucleus with thiophene ring and/or combined into the C-22 in the side-chain. Based on the previous reports of sulfur-containing steroids with methylthio-steroids and intra-molecular form, four formation mechanisms of sulfur-containing steroids and diagenetic pathway of steroids under S-rich conditions were proposed in this paper according to the double bond positions in the sterene compounds. Hydrogenation and sulfurization both occurred in the diagenetic processes of olefinic bond in the side-chain of steroids: abiogenic chemical hydrogenation of H 2 S and HS -leads to the formation of regular steranes; a successful sulfurization process leads to the formation of the side-chain sulfur-containing steroids whereas unsuccessful cyclization and/or sulfurization result in the generation of short-chain steranes. This kind of mechanism of hydrogenation/sulfurization of side-chain olefinic bond provides a potential genesis clue for the occurrence of high abundance of short-chain steranes (higher than the common regular steroids, phytane and n-alkanes) in S-rich heavy oils and source rocks in the Jinxian Sag, Bohai Bay Basin, North China. sulfur-containing steroids, short-chain steranes, sulfurization, hydrogenation, C-S bond, H 2 S, Jinxian Sag Citation:Lu H, Wang Q T, Jiang L X, et al. Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag, Bohai Bay

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Section: Formation Pathway Of Sulfur-containing Steroids and The Hydrmentioning

confidence: 99%

Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag, Bohai Bay Basin, North China

Wang

Jiang

et al. 2013

Sci. China Earth Sci.

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“…**-stenols (XI) to A3,5,22 -steratrienes, hydrogenation to A'. *'-steradienes, and subsequent isomerization (DE LEEUW et al, 1989). Some of these processes may be microbially mediated (WAKEHAM, 1987).…”

Section: Unsaturated Steroid Hydrocarbonsmentioning

confidence: 99%

Sedimentary lipid biogeochemistry of an hypereutrophic alkaline lagoon

Grimalt

Yruela

Sáiz‐Jiménez

et al. 1991

Geochimica et Cosmochimica Acta

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“…A great number of studies have reported that hopanes and steranes also can be released from kerogen and/or solid bitumen by thermal pyrolysis, chemical degradation and catalytic hydropyrolysis (Seifert, 1978;Tissot and Welte, 1978;Mackenzie et al, 1982aMackenzie et al, , 1982bMycke and Michaelis, 1986;Eglinton and Douglas, 1987;Mycke et al, 1987;de Leeuw et al, 1989;Abbott et al, 1990;Hoffman et al, 1992;Richnow et al, 1992;Adam et al, 1993;Love et al, 1995;Muhammad and Abbott, 2012). Various conditions (temperature and time) have been used for thermal pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Differences in the thermal evolution of hopanes and steranes in free and bound fractions

Geng

2016

Organic Geochemistry

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Limited double bond isomerisation and selective hydrogenation of sterenes during early diagenesis

Cited by 109 publications

References 24 publications

Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag, Bohai Bay Basin, North China

Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag, Bohai Bay Basin, North China

Sedimentary lipid biogeochemistry of an hypereutrophic alkaline lagoon

Differences in the thermal evolution of hopanes and steranes in free and bound fractions

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