Evolution of tricyclic alkanes in the Espirito Santo Basin, Brazil

Details Evolution of tricyclic alkanes in the Espirito Santo Basin, Brazil Evolution of tricyclic alkanes in the Espirito Santo Basin, Brazil

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.2069a&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 50, Issue 9, pp.2069-2072

Computer Science

Scientific paper

The distributions of tricyclic isoprenoid alkanes were characterized in the Neocomian sequence from the Espirito Santo Basin, Brazil, by high-resolution gas chromatography-mass spectrometry and co-injection with synthetic standards where available. A suite of homologous components ranging from C 20 to C 28 were present throughout the sequence as a mixture of stereoisomers whose relative abundance changed with depth. The epimerization rates were similar for the various tricyclic compounds irrespective of side-chain length, achieving equilibrium ratios before the main stage of oil generation. This new maturity parameter should be useful as a supplement to sterane/hopane measurements.

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