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

Quimica nova

Carvalho, Ismar de Souza¹  Azevedo, Débora de Almeida¹  Fernandes, Antônio Carlos Sequeira¹  Pereira, Ricardo¹ 

[1] Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

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 compositionof seven amber samples from Araripe Basin (Santana Formation, Crato Member)has been analyzed by gas chromatography-mass spectrometry to determine theirbotanical origin. The diterpenoids, which have been identified in the fossilresin 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 iscertainly typical for conifers, and angiosperms can be excluded as the botanicalsource, as no triterpene was identified. The terpenoid characteristics stronglysupport a relationship to the Araucariaceae or Podocarpaceae families. In addition,the fossil record of the embedding sediments (pollen and fossil leaves) alsosupports the proposal of these paleobotanical origins for the ambers.

【 授权许可】

CC BY