Bitumens in the Mir Kimberlite Pipe (Yakutia).
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| Title: | Bitumens in the Mir Kimberlite Pipe (Yakutia). |
|---|---|
| Authors: | Kaminsky, F. V.1 (AUTHOR) kaminsky@geokhi.ru, Konopleva, I. V.1 (AUTHOR) konopleva@geokhi.ru, Skvortsova, V. L.1 (AUTHOR), Kuznetsova, O. V.1 (AUTHOR) |
| Source: | Geochemistry International. Aug2025, Vol. 63 Issue 8, p665-674. 10p. |
| Subjects: | Bitumen, Marine habitats, Carbon isotopes, Kimberlite, Biomarkers, Organic compounds |
| Abstract: | Solid bitumens in the Mir kimberlite pipe form vein-like segregations several centimeters in size. They are distributed irregularly in the pipe body, regardless of the kimberlite breccia varieties distribution. The bitumen content in the kimberlites ranges from 0.001 to 0.12 wt %. Bitumen-rich areas are confined to the pipe contacts and faults. The question of the origin of bitumens in kimberlites is hotly debated. Therefore, this work is aimed at determining their origin in the Mir pipe. The studied bitumen-bearing kimberlite samples were collected in the Mir pipe, from depths of 100 and 130 m. The chloroform bitumoid was extracted from bitumen. The carbon isotope compositions of bitumoids were determined, and biomarker analysis was carried out by gas chromatography mass spectrometry. Biomarker hydrocarbons were detected in the bitumoid, indicating a biogenic origin of the organic matter. The following biomarkers were identified: n-alkanes, isoprenoids Pr and Ph, tri- and pentacyclic terpanes–hopanes, and steranes. The pristane to phytane ratio Pr/Ph = 0.8 indicates reducing conditions of formation corresponding to marine environment. The oddness ratio of n-alkanes, sterane and hopane maturity indices show that the thermal maturity of organic matter (OM) corresponds to the initial stage of the oil formation. The low content of long-chain alkanes and the predominance of C29 over C27 among regular steranes (C29/C27 = 2.2) allow us to assume that the initial biota for the OM of the bitumen sample under study could be phytoplankton. The δ13CVPDB values of the studied bitumoid (from –29.4 to –31.6‰) correspond to the isotopic compositions of bitumoids in the Paleozoic and Mesozoic sediments of the Siberian Platform (from –25.8 to –33.8‰) and differ significantly from the isotopic composition of endogenous carbon (from –2 to –10‰). According to these features, the investigated bitumen from the Mir pipe is of marine origin. [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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 188005353 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Bitumens in the Mir Kimberlite Pipe (Yakutia). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kaminsky%2C+F%2E+V%2E%22">Kaminsky, F. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kaminsky@geokhi.ru</i><br /><searchLink fieldCode="AR" term="%22Konopleva%2C+I%2E+V%2E%22">Konopleva, I. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> konopleva@geokhi.ru</i><br /><searchLink fieldCode="AR" term="%22Skvortsova%2C+V%2E+L%2E%22">Skvortsova, V. L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuznetsova%2C+O%2E+V%2E%22">Kuznetsova, O. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geochemistry+International%22">Geochemistry International</searchLink>. Aug2025, Vol. 63 Issue 8, p665-674. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Bitumen%22">Bitumen</searchLink><br /><searchLink fieldCode="DE" term="%22Marine+habitats%22">Marine habitats</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+isotopes%22">Carbon isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Kimberlite%22">Kimberlite</searchLink><br /><searchLink fieldCode="DE" term="%22Biomarkers%22">Biomarkers</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Solid bitumens in the Mir kimberlite pipe form vein-like segregations several centimeters in size. They are distributed irregularly in the pipe body, regardless of the kimberlite breccia varieties distribution. The bitumen content in the kimberlites ranges from 0.001 to 0.12 wt %. Bitumen-rich areas are confined to the pipe contacts and faults. The question of the origin of bitumens in kimberlites is hotly debated. Therefore, this work is aimed at determining their origin in the Mir pipe. The studied bitumen-bearing kimberlite samples were collected in the Mir pipe, from depths of 100 and 130 m. The chloroform bitumoid was extracted from bitumen. The carbon isotope compositions of bitumoids were determined, and biomarker analysis was carried out by gas chromatography mass spectrometry. Biomarker hydrocarbons were detected in the bitumoid, indicating a biogenic origin of the organic matter. The following biomarkers were identified: n-alkanes, isoprenoids Pr and Ph, tri- and pentacyclic terpanes–hopanes, and steranes. The pristane to phytane ratio Pr/Ph = 0.8 indicates reducing conditions of formation corresponding to marine environment. The oddness ratio of n-alkanes, sterane and hopane maturity indices show that the thermal maturity of organic matter (OM) corresponds to the initial stage of the oil formation. The low content of long-chain alkanes and the predominance of C29 over C27 among regular steranes (C29/C27 = 2.2) allow us to assume that the initial biota for the OM of the bitumen sample under study could be phytoplankton. The δ13CVPDB values of the studied bitumoid (from –29.4 to –31.6‰) correspond to the isotopic compositions of bitumoids in the Paleozoic and Mesozoic sediments of the Siberian Platform (from –25.8 to –33.8‰) and differ significantly from the isotopic composition of endogenous carbon (from –2 to –10‰). According to these features, the investigated bitumen from the Mir pipe is of marine origin. [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/S0016702924601694 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 665 Subjects: – SubjectFull: Bitumen Type: general – SubjectFull: Marine habitats Type: general – SubjectFull: Carbon isotopes Type: general – SubjectFull: Kimberlite Type: general – SubjectFull: Biomarkers Type: general – SubjectFull: Organic compounds Type: general Titles: – TitleFull: Bitumens in the Mir Kimberlite Pipe (Yakutia). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kaminsky, F. V. – PersonEntity: Name: NameFull: Konopleva, I. V. – PersonEntity: Name: NameFull: Skvortsova, V. L. – PersonEntity: Name: NameFull: Kuznetsova, O. V. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00167029 Numbering: – Type: volume Value: 63 – Type: issue Value: 8 Titles: – TitleFull: Geochemistry International Type: main |
| ResultId | 1 |
