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

Química Nova

Ricardo Pereira²  Ismar De Souza Carvalho²  Antônio Carlos Sequeira Fernandes¹  Débora De Almeida Azevedo¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Geociências Departamento de GeologiaRio de Janeiro RJ ,Brasil

关键词: amber;    terpenoids;    chemotaxonomy;   

DOI  :  10.1590/S0100-40422009000600032

来源: SciELO

【 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】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License