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Tri- and tetraterpenoid hydrocarbons in the Messel oil shaleThe 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.
Document ID
19740058734
Document Type
Reprint (Version printed in journal)
Authors
Kimble, B. J.
Maxwell, J. R.
Philp, R. P.
Eglinton, G. (Bristol, University Bristol, United Kingdom)
Albrecht, P.
Ensminger, A.
Arpino, P.
Ourisson, G. (Universite Louis Pasteur Strasbourg, France)
Date Acquired
August 7, 2013
Publication Date
July 1, 1974
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 38
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGL-05-003-003
CONTRACT_GRANT: NERC-GR/3/655
Distribution Limits
Public
Copyright
Other