Physics
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49..385a&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 49, Issue 2, pp.385-395
Physics
3
Scientific paper
The distributions of di- and trimethylnaphthalenes in two sedimentary sequences from Western Australia have been examined by capillary gas chromatography and combined gas chromatography-mass spectrometry. A general decrease was observed in the relative proportions of -dimethylnaphthalenes and -trimethylnaphthalenes with increasing thermal maturity. Similar trends were also observed for six crude oils which have very different ratios of ethylcholestane epimers indicating very different thermal histories. These results suggest that changes in the relative abundances of certain methyl substituted naphthalenes may be useful indicators of thermal maturity of sedimentary organic matter, and the use of a number of isomer ratios is illustrated.
Alexander Romannikov
Chirila T. V.
Kagi Robert I.
Rowland Steven J.
Sheppard P. N.
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