Distribution of Hydrocarbon Biomarkers with Depth in Marine Sediments in the Area of the Linear Depression of the West Kara Stage.
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| Title: | Distribution of Hydrocarbon Biomarkers with Depth in Marine Sediments in the Area of the Linear Depression of the West Kara Stage. |
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| Authors: | Sevastyanov, V. S.1 (AUTHOR), Fedulov, V. S.1 (AUTHOR) fedulov.vs@yandex.ru, Fedulova, V. Yu.1 (AUTHOR), Dzhenloda, R. H.1 (AUTHOR), Dushenko, N. V.1 (AUTHOR), Voropaev, S. A.1 (AUTHOR) |
| Source: | Geochemistry International. Apr2025, Vol. 63 Issue 4, p307-320. 14p. |
| Subjects: | Marine sediments, Composition of sediments, Earth sciences, Drill core analysis, Organic compounds |
| Abstract: | Studies of molecular and hydrocarbon composition of marine sediments provide important information on sedimentary organic matter (OM). In this work, the distribution of hydrocarbons and molecular markers with depth in the sedimentary cover of the linear depression of the West Kara stage was studied. To do this, two sediment cores were sampled during 89th cruise of the R/V Akademik Mstislav Keldysh at site 7444 and at background site 7441. The distribution of n-alkanes was measured by GC-MS analysis, and the distribution patterns of the biomarker indices of sedimentary OM in the marine sediments with depth were determined. It was shown that higher terrestrial vegetation was the dominant source to the sedimentary OM of marine sediments at sites 7444 and 7441. The OM is of low maturity, as follows from its Ts/(Ts + Tm) ratio. According to the values of H31-S/H31-(S + R) and NAR indices, a small constant inflow of oil hydrocarbons occurs in the study area, and a much lower inflow takes place at background site 7441. The distribution of the CPI25–33, TAR, and NAR suggest that hydrocarbons of anthropogenic origin occur in the near-surface layers of 0–15 cm sediment at background site 7441. [ABSTRACT FROM AUTHOR] |
| Copyright of Geochemistry International is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 185426229 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Distribution of Hydrocarbon Biomarkers with Depth in Marine Sediments in the Area of the Linear Depression of the West Kara Stage. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sevastyanov%2C+V%2E+S%2E%22">Sevastyanov, V. S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fedulov%2C+V%2E+S%2E%22">Fedulov, V. S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fedulov.vs@yandex.ru</i><br /><searchLink fieldCode="AR" term="%22Fedulova%2C+V%2E+Yu%2E%22">Fedulova, V. Yu.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dzhenloda%2C+R%2E+H%2E%22">Dzhenloda, R. H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dushenko%2C+N%2E+V%2E%22">Dushenko, N. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Voropaev%2C+S%2E+A%2E%22">Voropaev, S. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geochemistry+International%22">Geochemistry International</searchLink>. Apr2025, Vol. 63 Issue 4, p307-320. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Marine+sediments%22">Marine sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Composition+of+sediments%22">Composition of sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Drill+core+analysis%22">Drill core analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Studies of molecular and hydrocarbon composition of marine sediments provide important information on sedimentary organic matter (OM). In this work, the distribution of hydrocarbons and molecular markers with depth in the sedimentary cover of the linear depression of the West Kara stage was studied. To do this, two sediment cores were sampled during 89th cruise of the R/V Akademik Mstislav Keldysh at site 7444 and at background site 7441. The distribution of n-alkanes was measured by GC-MS analysis, and the distribution patterns of the biomarker indices of sedimentary OM in the marine sediments with depth were determined. It was shown that higher terrestrial vegetation was the dominant source to the sedimentary OM of marine sediments at sites 7444 and 7441. The OM is of low maturity, as follows from its Ts/(Ts + Tm) ratio. According to the values of H31-S/H31-(S + R) and NAR indices, a small constant inflow of oil hydrocarbons occurs in the study area, and a much lower inflow takes place at background site 7441. The distribution of the CPI25–33, TAR, and NAR suggest that hydrocarbons of anthropogenic origin occur in the near-surface layers of 0–15 cm sediment at background site 7441. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geochemistry International is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0016702924601050 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 307 Subjects: – SubjectFull: Marine sediments Type: general – SubjectFull: Composition of sediments Type: general – SubjectFull: Earth sciences Type: general – SubjectFull: Drill core analysis Type: general – SubjectFull: Organic compounds Type: general Titles: – TitleFull: Distribution of Hydrocarbon Biomarkers with Depth in Marine Sediments in the Area of the Linear Depression of the West Kara Stage. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sevastyanov, V. S. – PersonEntity: Name: NameFull: Fedulov, V. S. – PersonEntity: Name: NameFull: Fedulova, V. Yu. – PersonEntity: Name: NameFull: Dzhenloda, R. H. – PersonEntity: Name: NameFull: Dushenko, N. V. – PersonEntity: Name: NameFull: Voropaev, S. A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00167029 Numbering: – Type: volume Value: 63 – Type: issue Value: 4 Titles: – TitleFull: Geochemistry International Type: main |
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