Polar constituents of organic matter rich marls from evaporitic series of the Mulhouse basin |
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| Authors: | P Schaeffer F Fache-Dany JM Trendel P Albrecht |
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| Abstract: | A suite of marl samples from the evaporitic series of the Mulhouse basin (France; Lower Oligocene) was studied for its biomarker content, in particular its polar constituents. Novel series of 3-carboxyalkyl steranes and 15-oxo triaromatic ketones were identified by synthesis. The 3-carboxyalkyl steranes probably originate from highly polar precursors yet unreported in living organisms. Our data suggest that micro-algae could be the major source of these compounds which seem to be indicators of high algal input rather than characteristic of evaporitic environments. The 15-oxo triaromatic ketones could be oxidation products of triaromatic steroid hydrocarbons formed during diagenesis, although their formation during work-up procedure could not be excluded. |
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| Keywords: | evaporitic environments paleoenvironmental reconstructions biomarkers polar constituents 3-alkyl steranes 3-(carboxyalkyl) steranes aromatic steroid ketones |
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