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Duxite – Fossil resin of Miocene age.

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Title: Duxite – Fossil resin of Miocene age.
Authors: Havelcová, Martina1 havelcova@irsm.cas.cz, Machovič, Vladimír1, Sýkorová, Ivana1, Lapčák, Ladislav1, Špaldoňová, Alexandra1, Mach, Karel1, Dvořák, Zdeněk1
Source: Organic Geochemistry. Oct2018, Vol. 124, p190-204. 15p.
Subjects: Fossil resins, Sesquiterpenes, Terpenes, Resinite, Raman spectra
Abstract: Highlights • Samples of fossil resins named duxite were analysed. • Pyrolitic and spectroscopic fingerprints were obtained. • Sesquiterpenes including α-cedrene and cuparene were identified. • Duxite is a member of Class IV resins without a polymeric structure. • Variances in chemical structure attributed to the geologic paleosituation. Abstract A series of Miocene fossil resin from the northwest part of the Czech Republic, called duxite, has been analyzed by elemental, microscopic, gas chromatography (GC/MS), pyrolysis-gas chromatography, Fourier Transform infrared (FTIR), and Raman techniques. The set of samples consisted of museum, contemporary and artificially altered samples. The results of GC/MS revealed fine variances in chemical structure among the samples, which could be attributed to the geologic paleosituation during resin deposition, as was verified by alteration of a sample under different conditions. Sesquiterpenes, including α-cedrene and cuparene, were identified in sample extracts and sample pyrolysates together with diterpenoid members abietanes, pimaranes, and dehydroabietanes. The distribution and intensity of functional groups of FTIR spectra also confirmed that the duxite samples were fossilised exudates from a member of the Cupressaceae conifer family. Raman spectra supported this record indicating aromatic character of duxite and higher maturity of the samples. The chemical composition indicated that duxite is a member of Class IV resins of the fossil resin classification system. Members of this group do not have a polymeric structure. This nonpolymerizable behaviour was confirmed by their excellent solubility in an organic solvent and the low softening point of the material. Our results therefore provide a valuable insight into the duxite-producing process and its potential for evaluating the geological environment and diagenetic conditions. [ABSTRACT FROM AUTHOR]
Copyright of Organic Geochemistry is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
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  Data: Duxite – Fossil resin of Miocene age.
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  Data: <searchLink fieldCode="AR" term="%22Havelcová%2C+Martina%22">Havelcová, Martina</searchLink><relatesTo>1</relatesTo><i> havelcova@irsm.cas.cz</i><br /><searchLink fieldCode="AR" term="%22Machovič%2C+Vladimír%22">Machovič, Vladimír</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sýkorová%2C+Ivana%22">Sýkorová, Ivana</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lapčák%2C+Ladislav%22">Lapčák, Ladislav</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Špaldoňová%2C+Alexandra%22">Špaldoňová, Alexandra</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mach%2C+Karel%22">Mach, Karel</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dvořák%2C+Zdeněk%22">Dvořák, Zdeněk</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Organic+Geochemistry%22">Organic Geochemistry</searchLink>. Oct2018, Vol. 124, p190-204. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Fossil+resins%22">Fossil resins</searchLink><br /><searchLink fieldCode="DE" term="%22Sesquiterpenes%22">Sesquiterpenes</searchLink><br /><searchLink fieldCode="DE" term="%22Terpenes%22">Terpenes</searchLink><br /><searchLink fieldCode="DE" term="%22Resinite%22">Resinite</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+spectra%22">Raman spectra</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Highlights • Samples of fossil resins named duxite were analysed. • Pyrolitic and spectroscopic fingerprints were obtained. • Sesquiterpenes including α-cedrene and cuparene were identified. • Duxite is a member of Class IV resins without a polymeric structure. • Variances in chemical structure attributed to the geologic paleosituation. Abstract A series of Miocene fossil resin from the northwest part of the Czech Republic, called duxite, has been analyzed by elemental, microscopic, gas chromatography (GC/MS), pyrolysis-gas chromatography, Fourier Transform infrared (FTIR), and Raman techniques. The set of samples consisted of museum, contemporary and artificially altered samples. The results of GC/MS revealed fine variances in chemical structure among the samples, which could be attributed to the geologic paleosituation during resin deposition, as was verified by alteration of a sample under different conditions. Sesquiterpenes, including α-cedrene and cuparene, were identified in sample extracts and sample pyrolysates together with diterpenoid members abietanes, pimaranes, and dehydroabietanes. The distribution and intensity of functional groups of FTIR spectra also confirmed that the duxite samples were fossilised exudates from a member of the Cupressaceae conifer family. Raman spectra supported this record indicating aromatic character of duxite and higher maturity of the samples. The chemical composition indicated that duxite is a member of Class IV resins of the fossil resin classification system. Members of this group do not have a polymeric structure. This nonpolymerizable behaviour was confirmed by their excellent solubility in an organic solvent and the low softening point of the material. Our results therefore provide a valuable insight into the duxite-producing process and its potential for evaluating the geological environment and diagenetic conditions. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Organic Geochemistry is the property of Pergamon Press - An Imprint of Elsevier Science 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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        Value: 10.1016/j.orggeochem.2018.07.014
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        Text: English
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      – SubjectFull: Fossil resins
        Type: general
      – SubjectFull: Sesquiterpenes
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      – SubjectFull: Terpenes
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      – SubjectFull: Resinite
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      – SubjectFull: Raman spectra
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      – TitleFull: Duxite – Fossil resin of Miocene age.
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              M: 10
              Text: Oct2018
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              Y: 2018
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