EXTENDED 3β-ALKYL STERANES AND 3-ALKYL TRIAROMATIC STEROIDS IN CRUDE OILS AND ROCK EXTRACTS

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dc.contributor.author Dahl J.
dc.contributor.author Moldowan J.M.
dc.contributor.author Summons R.E.
dc.contributor.author McCaffrey M.A.
dc.contributor.author Lipton P.
dc.contributor.author Watt D.S.
dc.contributor.author Hope J.M.
dc.date.accessioned 2020-11-26T05:24:48Z
dc.date.available 2020-11-26T05:24:48Z
dc.date.issued 1995
dc.identifier https://elibrary.ru/item.asp?id=661609
dc.identifier.citation Geochimica et Cosmochimica Acta, 1995, , 18, 3717-3729
dc.identifier.issn 0016-7037
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/19588
dc.description.abstract In oils and Precambrian- to Miocene-age source rocks from varying depositional environments, we have conclusively identified several novel 3-alkyl sterane and triaromatic steroid series, including (1) 3β-n-pentyl steranes, (2) 3β-isopentyl steranes, (3) 3β-n-hexyl steranes, (4) 3β-n-heptyl steranes, (5) 3,4-dimethyl steranes, (6) 3β-butyl,4-methyl steranes, (7) triaromatic 3-n-pentyl steroids, and (8) triaromatic 3-isopentyl steroids. We have also tentatively identified additional homologs with 3-alkyl substituents as large as C11. The relative abundances of these compounds vary substantially between samples, as indicated by (1) the ratio of 3β-n-pentyl steranes to 3β-isopentyl steranes and (2) the ratio of 3-n-pentyl triaromatic steroids to 3-isopentyl triaromatic steroids. These data suggest possible utility for these parameters as tools for oil-source rock correlations and reconstruction of depositional environments. Although no 3-alkyl steroid natural products are currently known, several lines of evidence suggest that 3β-alkyl steroids result from bacterial side-chain additions to diagenetic Δ2-sterenes.
dc.subject Miocene en
dc.subject Precambrian en
dc.title EXTENDED 3β-ALKYL STERANES AND 3-ALKYL TRIAROMATIC STEROIDS IN CRUDE OILS AND ROCK EXTRACTS
dc.type Статья
dc.subject.age Кайнозой::Неоген::Миоцен ru
dc.subject.age Cenozoic::Neogene::Miocene en
dc.subject.age Precambrian en
dc.subject.age Докембрий ru


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