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Science 17 April 1992:
Vol. 256. no. 5055, pp. 358 - 362
DOI: 10.1126/science.256.5055.358
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Articles

Recognition of Paleobiochemicals by a Combined Molecular Sulfur and Isotope Geochemical Approach

Math E. L. Kohnen 1, Stefan Schouten 1, Jaap S. Sinninghe Damsté 1, Jan W. de Leeuw 1, Dawn A. Merritt 2, and J. M. Hayes 2

1 Organic Geochemistry Unit, Faculty of Chemical Technology and Materials Science, Delft University of Technology, De Vries van Heystplantsoen 2, 2628 RZ Delft, the Netherlands
2 Biogeochemical Laboratories, Departments of Chemistry and Geology, Geology Building, Indiana University, Bloomington, IN 47405

Study of organic matter in immature sediments from a Messinian evaporitic basin shows that consideration of structures, modes of occurrence, and carbon isotopic compositions of free and sulfur-bound carbon skeletons allow identification of biochemical precursors. Detailed information concerning biotic communities present during deposition of sediments can be retrieved in this way. Moreover, unprecedented biochemicals were recognized; these extend the horizon of biomarker geochemistry.


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