Molecular composition and paleobotanical origin of ambers from the Araripe basin, Santana Formation

Química Nova

Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Azevedo, Débora de Almeida¹  Carvalho, Ismar de Souza¹  Fernandes, Antônio Carlos Sequeira¹  Pereira, Ricardo¹ 

关键词: amber;    terpenoids;    chemotaxonomy.;   

DOI  :  10.1590/S0100-40422009000600032

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The terpenoid composition of seven amber samples from Araripe Basin (Santana Formation, Crato Member) has been analyzed by gas chromatography-mass spectrometry to determine their botanical origin. The diterpenoids, which have been identified in the fossil resin extracts are derived primarily from the abietane class, e.g., dehydroabietane, 4-epidehydroabietol, 16,17,18-trisnorabieta-8,11,13-triene, 7-oxo-16,17,19-trisnorabieta-8,11,13-trieno, dehydroabietic acid, ferruginol, hinokiol and hinokione. Their composition is certainly typical for conifers, and angiosperms can be excluded as the botanical source, as no triterpene was identified. The terpenoid characteristics strongly support a relationship to the Araucariaceae or Podocarpaceae families. In addition, the fossil record of the embedding sediments (pollen and fossil leaves) also supports the proposal of these paleobotanical origins for the ambers.

【 授权许可】

Unknown