Gas chromatographic/mass spectrometric (GC/MS) analysis of C27–30-steranes

Steen, Arne

doi:10.1016/s0146-6380(86)80055-9

Cited by 25 publications

(2 citation statements)

References 9 publications

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“…Therefore, cholestane and diacholestane isomers (C 27 ) were selectively analysed by gas chromatography-mass spectrometry with metastable reaction monitoring ( Fig. 4 and 5; Steen, 1986). In the sediment extracts from the Paris Basin, the major steranes and diasteranes are C 27 -C 29 members.…”

Section: Steranesmentioning

confidence: 99%

A molecular and isotopic study of the organic matter from the Paris Basin, France

Lichtfouse

Albrecht

Béhar

et al. 1994

Geochimica et Cosmochimica Acta

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Thirteen Liassic sedimentary rocks of increasing depth and three petroleums from the Paris Basin were studied for 13C/12C isotopic compositions and biological markers, including steranes, sterenes, methylphenanthrenes, methylanthracenes, and triaromatic steroids. The isotopic compositions of n-alkanes from mature sedimentary rocks and petroleums fall in a narrow range (2%), except for the deepest Hettangian rock and the Trias petroleum, for which the short-chain n-alkanes are enriched and depleted in 13C, respectively. Most of the molecular parameters increase over the 2000-2500 m depth range, reflecting the transformation of the organic matter at the onset of petroleum generation. In this zone, carbonate content and carbon isotopic composition of carbonates, as well as molecular parameters, are distinct for the Toarcian and Hettangian source rocks and suggest a migration of organic matter from these two formations. Two novel molecular parameters were defined for this task: one using methyltriaromatic steroids from organic extracts; the other using 1-methylphenanthrene and 2-methylanthracene from kerogen pyrolysates. The anomalous high maturity of the Dogger petroleum relative to the maturity-depth trend of the source rocks is used to estimate the minimal vertical distance of migration of the organic matter from the source rock to the reservoir.

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Section: Steranesmentioning

confidence: 99%

A molecular and isotopic study of the organic matter from the Paris Basin, France

Lichtfouse

Albrecht

Béhar

et al. 1994

Geochimica et Cosmochimica Acta

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“…The mass spectrometer was a VG 70E modeloperated in both selective metastable ion monitoring (SMIM) mode and voltage selected ion recording (VSIR) mode. Both methods are described in Steen (1986).…”

Section: Methodsmentioning

confidence: 99%

Organic geochemistry of the Lower Jurassic Sortehat Formation, Jameson Land, East Greenland

Krabbe¹,

Christiansen²,

Dam³

et al. 1994

rapggu

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Biomarker analyses of Lower Jurassic shales from the Sortehat Formation, Jameson Land, central East Greenland carried out in combination with palynological studies demonstrate deposition in a fresh to brackish water environment, which became increasingly saline towards the top. The formation is regionally immature to early mature with respect to hydrocarbon generation, and the lowermost 2–20 m have a fair generation potential. Biomarker analysis of the brackish water part shows dominance of C16–C21 n-alkanes, high pristane/phytane ratios, high hopane/sterane ratios, high relative amounts of C29–C31 hopanes and C2717α-trisnorhopane. Steranes are dominated by C29 isomers. The organic matter is composed of bacteria, algae and land plants interpreted from biomarker distributions. The combined data set suggests that deposition took place during an overall rise in relative sea level.

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Biodegradation of the (aliphatic + aromatic) fraction of Oural crude oil. Biomarker identification using GC/MS SIM and GC/MS/MS

Jacquot

Doumenq

Guiliano

et al. 1996

Talanta

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Gas chromatographic/mass spectrometric (GC/MS) analysis of C27–30-steranes

Cited by 25 publications

References 9 publications

A molecular and isotopic study of the organic matter from the Paris Basin, France

A molecular and isotopic study of the organic matter from the Paris Basin, France

Organic geochemistry of the Lower Jurassic Sortehat Formation, Jameson Land, East Greenland

Biodegradation of the (aliphatic + aromatic) fraction of Oural crude oil. Biomarker identification using GC/MS SIM and GC/MS/MS

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