Thermal alteration experiments on organic matter in recent marine sediment—I. Pigments |
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| Authors: | Raphael Ikan Zeev Aizenshtat Mary Jo Baedecker Isaac R Kaplan |
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| Institution: | Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90024, U.S.A. |
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| Abstract: | Sediment from Tanner Basin, located at the outer continental shelf off southern California, was analyzed for photosynthetic pigments and their derivatives, namely carotenes and chlorins. Samples of the sediment were also exposed to raised temperatures (65°, 100°, 150°C) for various periods of time (1 week, 1 month, 2 months). Analysis of the heat-treated sediment revealed the presence of α-ionene and 2,6-dimethylnaphthalene, thermal-degradation products of β-carotene. Chlorins were converted to nickel porphyrins of both DPEP and etio series. Possible mechanisms and geochemical significance of these transformations are presented. |
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