Computer Science
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.1345m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 8, pp.1345-1355
Computer Science
8
Scientific paper
Three series of monoaromatic steroid hydrocarbons ( base PEAK = m / z 239, 253 and 267) and four series of triaromatic steroid hydrocarbons ( base PEAK = m / z 217, 231, 245 and 259) have been recognised by computerised gas chromatography-mass spectrometry in a variety of samples of Lower Toarcian shales from the Paris Basin. An increase in the extent of aromatisation of the monoaromatic steroid hydrocarbons in the m / z 253 series (measured by the abundance of monoaromatic components relative to triaromatic components in the m / z 231 series) is observed with increasing maturity. Variations between reported maximum burial depth and extent of aromatisation are explicable partly in terms of new maximum burial depth information for some of the shales. The extent of carbon-carbon bond cracking in the side chains of the aromatic steroid hydrocarbons has only begun to be significant in certain of the deepest samples.
Hoffmann C. F.
MacKenzie Andrew S.
Maxwell James R.
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