| Autor: |
R.P. Philp, Guy Ourisson, Geoffrey Eglinton, A. Ensminger, Pierre Albrecht, B.J. Kimble, James R. Maxwell, P Arpino |
| Rok vydání: |
1974 |
| Předmět: |
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| Zdroj: |
Geochimica et Cosmochimica Acta. 38:1165-1181 |
| ISSN: |
0016-7037 |
| DOI: |
10.1016/0016-7037(74)90011-8 |
| Popis: |
The high-molecular-weight constituents of the branched and cyclic hydrocarbon fraction of the Messel oil shale (Eocene) have been examined by high-resolution gas chromatography and combined gas chromatography/mass spectrometry. The following compounds are present: perhydrolycopene, together with one or more unsaturated analogs with the same skeleton; a series of 4-methylsteranes in higher abundance than their 4-desmethyl analogs; two series of pentacyclic triterpanes, one series based on the hopane structure, and the other based on the 17 alpha-H hopane structure; and an intact triterpene hop-17(21)-ene. Only two additional triterpanes were detected in minor concentrations - namely, 30-normoretane and a C31 triterpane based on the hopane/lupane-type skeleton. The presence of these compounds suggests a significant microbial contribution to the forming sediment. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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