Benzohopanes and diaromatic 8(14)-secohopanoids in some Late Permian carbonates

Masahiro Oba, Masaoki Nakamura, Yoshihiko Fukuda, Masatoshi Katabuchi, Satoshi Takahashi, Masataka Haikawa, Kunio Kaiho

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11 Citations (Scopus)

Abstract

We have detected a family of benzohopanes cyclised at C-20 and two families of diaromatic 8(14)-secohopanoids, in carbonates from the Late Permian Meishan (China) and Bulla (Italy) sections. Furthermore, we have identified a C 33 8(14)-secohopanoid possessing a fluorene moiety. The relative distribution of 8(14)-secohopanoids with a fluorene moiety was similar to that of benzohopanes cyclised at C-20, suggesting that the secohopanoids might be diagenetic products of benzohopanes, or that the benzohopanes and secohopanoids share the same precursor. Furthermore, the series of benzohopanes cyclised at C-16 was not detected from the carbonates of the two sections, which might suggest that the benzohopanes cyclised at C-16 are thermodynamically less stable than those with the aromatic ring attached at C-20.

Original languageEnglish
Pages (from-to)29-35
Number of pages7
JournalGeochemical Journal
Volume43
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • Benzohopanes
  • Diagenesis
  • Diaromatic 8(14)-secohopanoids
  • GC-MS
  • Late Permian carbonates

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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