Molecular composition and chemosystematic aspects of Cretaceous amber from the Amazonas, Araripe and Recôncavo basins, Brazil

Pereira, Ricardo; Carvalho, Ismar de Souza; Simoneit, Bernd R.T.; Azevedo, Débora de Almeida

doi:10.1016/j.orggeochem.2009.05.002

Cited by 75 publications

(71 citation statements)

References 70 publications

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“…Além disso, destaca-se que triterpenos não foram detectados nas amostras, o que exclui as angiospermas como fonte para as resinas fósseis analisadas. 34 Dessa forma, a proposição feita anteriormente que amostras de âmbar tenham sido produzidas especificamente por coníferas da família Araucariaceae deve ser revista, 10 uma vez que Podocarpaceae também é uma possibilidade a ser considerada em maior detalhe.…”

Section: Aspectos Quimiotaxonômicosunclassified

“…Uma revisão bibliográfica detalhada indicou poucos trabalhos propondo-se à elucidação da origem botânica de âmbares brasileiros a partir de sua composição molecular por meio de CG-EM, sendo conhecidas informações sobre um número muito reduzido de amostras. 9,10 A maior parte dos dados presentes na literatura refere-se apenas ao registro de ocorrências de âmbar dentro de seu contexto geológico, sem dados moleculares e quimiotaxonômicos sobre as resinas. 11 Existem ainda algumas informações disponíveis obtidas por espectroscopia no infravermelho para âmbares provenientes do Mioceno e Cretáceo.…”

Section: Introductionunclassified

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Composição molecular e origem paleobotânica de âmbares da bacia do Araripe, Formação Santana

Pereira¹,

Carvalho²,

Fernandes³

et al. 2009

Quím. Nova

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Section: Aspectos Quimiotaxonômicosunclassified

Section: Introductionunclassified

Composição molecular e origem paleobotânica de âmbares da bacia do Araripe, Formação Santana

Pereira¹,

Carvalho²,

Fernandes³

et al. 2009

Quím. Nova

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“…The terpenoids are common resin constituents and can be used as chemotaxonomic markers to elucidated the botanical origin of ambers, as well determining information related to diagenetic alterations. 3,9 Analysis of Lower Cretaceous amber from southern England (Isle of Wight -Barremian) by Py-GC-MS indicates a terpene composition dominated by abietane and labdane-type diterpenes, in according to some species of the family Pinaceae. 5 However, the authors could not exclude a possible botanical source linked to Cheirolepidiaceae, considering the presence of a large amount of micro and macrofossils from the mentioned family in the sediments where the amber samples were collected.…”

Section: Introductionmentioning

confidence: 99%

“…5 Later, other authors have also proposed this family as a possible botanical source for amber samples based in paleontological evidences. 8,9 Unfortunately, there were no geochemical evidences that could associate specific terpenoid classes to the Cheirolepidiaceae family. Recently, based on chemistry and pollen evidence, Menor-Salván et al 7 proposed new chemotaxonomical data about the paleobotanical origin of spanish ambers from Lower Cretaceous sediments of the Basque-Cantabrian Basin.…”

Section: Introductionmentioning

confidence: 99%

“…The geochemical data of Brazilian ambers pointed to several possible botanical origins, such as Cupressaceae, Araucariaceae or Podocarpaceae families. 9,10 For the Recôncavo ambers, considering the presence of kauranes and phyllocladanes, almost certainly the biological affinity is Araucariaceae or Podocarpaceae families. 9 The Table 1 summarizes some of the worldwide amber occurrences in Lower Cretaceous sediments, showing the proposed botanical affinities.…”

Section: Introductionmentioning

confidence: 99%

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Chemotaxonomical aspects of lower Cretaceous amber from Recôncavo Basin, Brazil

Pereira

Carvalho

Carlos

et al. 2011

J. Braz. Chem. Soc.

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A composição química de amostras de âmbar provenientes da Bacia do Recôncavo (Salvador, Bahia), datadas do Cretáceo Inferior, foi determinada por meio de CG-EM para caracterização das suas possíveis fontes botânicas. Os principais compostos identificados foram diterpenoides, tais como abietano, deidroabietano, tetraidroreteno, deidroabietol, ácido deidroabiético, ferruginol e sugiol. Outras classes de diterpenoides ou triterpenos não foram detectados. A composição dos extratos e os dados quimiotaxonômicos permitiram relacionar as amostras com coníferas das famílias Podocarpaceae ou Cheirolepidiaceae devido à detecção do ferruginol, um biomarcador específico para estas famílias. Desta forma, os dados concernentes aos âmbares da Bacia do Recôncavo forneceram informações quanto à presença de uma flora resinífera na Formação Maracangalha, quando da deposição de seus sedimentos durante o Cretáceo Inferior.The chemical composition of Lower Cretaceous amber samples from Recôncavo Basin (Salvador, Bahia) was performed by GC-MS to characterize possible botanical sources. The compounds identified were hydrocarbonic and polar diterpenoids, such as abietane, dehydroabietane, tetrahydroretene, dehydroabietol, dehydroabietic acid, ferruginol and sugiol. Other diterpenoid classes were not detected as well as triterpenoids. The composition of the extracts and chemosystematic data allows relating the samples to conifers of Podocarpaceae or Cheirolepidiaceae families due to detection of ferruginol, a specific biomarker to these families. The data concerning Cretaceous amber in the Recôncavo Basin provided information concerning the presence of a resinous flora in the Maracangalha Formation sediments during the Lower Cretaceous.

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Characterisation of copal resin and amber by negative‐ion electrospray ionisation Fourier transform ion cyclotron resonance mass spectrometry

et al. 2021

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Copal resin and amber from Columbia were analysed by negative‐ion electrospray ionisation (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICR MS), with particular focus on polar compounds with relatively high molecular weights. A total of 4038 and 2755 compounds were identified between m/z 150 and 1,000 in the spectra of the copal resin and amber DCM extracts, respectively. The CHO classes were the most abundant species in the detected polar compounds. The petrochemical process of converting copal resin to amber is accompanied by evaporation and dispersion of volatile molecules and polymerisation of relatively smaller molecules. Thus, the most abundant compounds in copal resin comprised more than one C5 basic unit compared to amber, and the relative abundances of compounds with a high number of carbon and oxygen atoms in amber were higher than those in copal resin. There were strong positive correlations between the double‐bond equivalence (DBEav) values and the number of oxygen atoms in both samples. The slopes and y‐intercepts of the linear relationship indicated that the C5 pentadienoic acid is the basic structure of heteroatom compound molecules in copal resin and amber. FT‐ICR MS analysis focuses on the characterisation of heteroatom compounds with relatively high molecular weight and is helpful to provide supplementary information on the origin and evolution of complex organic mixtures such as copal resin and amber at the molecular level in a fast and convenient way.

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Molecular composition and chemosystematic aspects of Cretaceous amber from the Amazonas, Araripe and Recôncavo basins, Brazil

Cited by 75 publications

References 70 publications

Composição molecular e origem paleobotânica de âmbares da bacia do Araripe, Formação Santana

Composição molecular e origem paleobotânica de âmbares da bacia do Araripe, Formação Santana

Chemotaxonomical aspects of lower Cretaceous amber from Recôncavo Basin, Brazil

Characterisation of copal resin and amber by negative‐ion electrospray ionisation Fourier transform ion cyclotron resonance mass spectrometry

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