| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5162035 | Organic Geochemistry | 2008 | 12 Pages |
Abstract
The 22S/(22S + 22R) ratios of C31, C32 and C33 homohopanes decreased, while that of C34 homohopanes increased for two samples, YHS1 and YHS6, after pyrolysis at low temperatures (180-270 °C). A major reversal of 20S/(20S + 20R) ratio for C29 steranes was observed at 240 °C for sample YHS1, but at 270 °C for sample YHS6. The distributions of homohopanes for these two samples after pyrolysis changed from their original patterns toward the normal pattern C31 > C32 > C33 > C34 > C35. These results reflect the influences of thermal degradation and direct isomerization of the free biomarkers and the release of bound biomarkers from kerogen and other macromolecules during pyrolysis.
Related Topics
Physical Sciences and Engineering
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Organic Chemistry
Authors
Changchun Pan, Dehua Peng, Min Zhang, Linping Yu, Guoying Sheng, Jiamo Fu,