Late Quaternary Mediterranean sapropels. III: Assessment of source of input and palaeotemperature as derived from biological markers |
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| Institution: | 1. Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China;2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Changping, Beijing 102249, China;3. Shenzhen Branch of China National Offshore Oil Corporation Ltd, Guangzhou 510240, China;1. School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia;2. Faculty of Pharmacy, Zarqa University, Zarqa, 13132, Jordan;3. Department of Chemistry, School of Science, The University of Jordan, Amman, 11942, Jordan;4. Fuels Science Consulting, 6635 Via Dante, Lake Worth, FL, 33467, USA;5. The Sentient Group, Suite 1, Level 17, 1 Castlereagh St, Sydney, NSW, 2000, Australia;1. C.I.R.S.A., Università di Bologna, Campus di Ravenna, via S.Alberto 163, I-48123 Ravenna, Italy;2. Istituto Motori-CNR, Napoli, Italy;1. Department of Environmental and Natural Resources Management, University of Patras, G. Seferi 2, 30100 Agrinio, Greece;2. Department of Biology, University of Patras, 26500 Patras, Greece;3. School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;4. Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ ICE-HT), Stadiou Str., Platani, 26504 Patras, Greece;5. Department of Chemical Engineering, University of Patras, 26500 Patras, Greece |
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| Abstract: | Sources of input contributing to the organic matter of four different Mediterranean sapropels (S1, S5, S6, S7) are inferred from the relative distributions of terrigenous and marine biological markers in these Quaternary deposits. The relative terrigenous contribution does not vary significantly. Within the marine contribution there is a significant compositional variation. A contribution from dinoflagellates is relatively important in the S1 sapropel, whereas sapropels S6 and S7 are characterized by a relatively large contribution from prymnesiophyte algae and planktonic cyanobacteria. The abundance of diatoms in sapropel S5, as deduced from microscopic observations, is probably reflected by a high concentration of loliolide.Variations in sea-surface water temperatures can be deduced from the relative abundance of di- and triunsaturated C37 ketones (Uk37 index) and from the relative abundance of esterified 27-nor-24-methylcholesta-5,22E-dien-3β-ol and cholesta-5,22E-dien-3β-ol (STI index). These two molecular temperature indices are consistent with the δ18O record and with the pollen record of the sapropels investigated. |
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