Terpenoid composition of fossil resins from western India: New insights into the occurrence of resin-producing trees in Early Paleogene equatorial rainforest of Asia.
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| Title: | Terpenoid composition of fossil resins from western India: New insights into the occurrence of resin-producing trees in Early Paleogene equatorial rainforest of Asia. |
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| Authors: | Paul, Swagata1 swagata@iitb.ac.in, Dutta, Suryendu1 s.dutta@iitb.ac.in |
| Source: | International Journal of Coal Geology. Oct2016, Vol. 167, p65-74. 10p. |
| Subjects: | Fossil resins, Terpenes, Paleogene, Rain forests, Diterpenes, Organic compounds |
| Geographic Terms: | India |
| Abstract: | The terpenoid composition of well-preserved fresh and oxidized fossil resins (ambers) from Early Paleogene lignite-bearing sequences of India have been examined using gas chromatography-mass spectrometry for determining their botanical origin. The samples were collected from two sedimentary basins viz. Barmer (Akli Formation) and Bikaner-Nagaur (Palana Formation), western India. The total extracts of the studied ambers are represented by hydronaphthalenes; sesquiterpenoids and significant occurrence of diterpenoids. Such terpenoid distribution is typical for gymnosperm, especially conifer derived sources. The diterpenoids are comprised of majorly abietane, phyllocladane, kaurane, pimarane/isopimarane and podocarpane class compounds. Tertracyclic diterpenoids such as 18-norkauranes, ent -16β(H)-kaurane and 16α(H)-phyllocladane and a rearranged tricyclic diterpenoid, rosane are detected in the fossil resins from Barmer Basin. The occurrence of tetracyclic diterpenoids and rosane together with 8,13-dimethyl-16-norpodocarpa-6-ene suggests that Podocarpaceae family is the possible source of the ambers. However, chemotaxonomic assignment at family level for the fossil resin from Bikaner-Nagaur Basin is difficult due to the absence of source specific diterpenoids. Previous reports had documented the occurrence of angiosperm-derived dammar resins from Early Paleogene sediments of India (Dutta et al., 2009; Rust et al., 2010 ). The present study suggests that the Early Paleogene resins of the equatorial rainforests were not always represented by the dammar resins derived from Dipterocarpaceae, a family of angiosperm, some of them were also contributed by the conifers. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Coal Geology is the property of Elsevier B.V. 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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| Items | – Name: Title Label: Title Group: Ti Data: Terpenoid composition of fossil resins from western India: New insights into the occurrence of resin-producing trees in Early Paleogene equatorial rainforest of Asia. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Paul%2C+Swagata%22">Paul, Swagata</searchLink><relatesTo>1</relatesTo><i> swagata@iitb.ac.in</i><br /><searchLink fieldCode="AR" term="%22Dutta%2C+Suryendu%22">Dutta, Suryendu</searchLink><relatesTo>1</relatesTo><i> s.dutta@iitb.ac.in</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Coal+Geology%22">International Journal of Coal Geology</searchLink>. Oct2016, Vol. 167, p65-74. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Fossil+resins%22">Fossil resins</searchLink><br /><searchLink fieldCode="DE" term="%22Terpenes%22">Terpenes</searchLink><br /><searchLink fieldCode="DE" term="%22Paleogene%22">Paleogene</searchLink><br /><searchLink fieldCode="DE" term="%22Rain+forests%22">Rain forests</searchLink><br /><searchLink fieldCode="DE" term="%22Diterpenes%22">Diterpenes</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22India%22">India</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The terpenoid composition of well-preserved fresh and oxidized fossil resins (ambers) from Early Paleogene lignite-bearing sequences of India have been examined using gas chromatography-mass spectrometry for determining their botanical origin. The samples were collected from two sedimentary basins viz. Barmer (Akli Formation) and Bikaner-Nagaur (Palana Formation), western India. The total extracts of the studied ambers are represented by hydronaphthalenes; sesquiterpenoids and significant occurrence of diterpenoids. Such terpenoid distribution is typical for gymnosperm, especially conifer derived sources. The diterpenoids are comprised of majorly abietane, phyllocladane, kaurane, pimarane/isopimarane and podocarpane class compounds. Tertracyclic diterpenoids such as 18-norkauranes, ent -16β(H)-kaurane and 16α(H)-phyllocladane and a rearranged tricyclic diterpenoid, rosane are detected in the fossil resins from Barmer Basin. The occurrence of tetracyclic diterpenoids and rosane together with 8,13-dimethyl-16-norpodocarpa-6-ene suggests that Podocarpaceae family is the possible source of the ambers. However, chemotaxonomic assignment at family level for the fossil resin from Bikaner-Nagaur Basin is difficult due to the absence of source specific diterpenoids. Previous reports had documented the occurrence of angiosperm-derived dammar resins from Early Paleogene sediments of India (Dutta et al., 2009; Rust et al., 2010 ). The present study suggests that the Early Paleogene resins of the equatorial rainforests were not always represented by the dammar resins derived from Dipterocarpaceae, a family of angiosperm, some of them were also contributed by the conifers. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Coal Geology is the property of Elsevier B.V. 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: 10.1016/j.coal.2016.09.008 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 65 Subjects: – SubjectFull: Fossil resins Type: general – SubjectFull: Terpenes Type: general – SubjectFull: Paleogene Type: general – SubjectFull: Rain forests Type: general – SubjectFull: Diterpenes Type: general – SubjectFull: Organic compounds Type: general – SubjectFull: India Type: general Titles: – TitleFull: Terpenoid composition of fossil resins from western India: New insights into the occurrence of resin-producing trees in Early Paleogene equatorial rainforest of Asia. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Paul, Swagata – PersonEntity: Name: NameFull: Dutta, Suryendu IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 01665162 Numbering: – Type: volume Value: 167 Titles: – TitleFull: International Journal of Coal Geology Type: main |
| ResultId | 1 |
