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Authors
Affiliations
1 Ankara University, Department of Geological Engineering, 061 OO,Tandogan, Ankara, IN
2 Ankara University,Department of Geological Engineering, 06 100,Tandogan, Ankara, TR
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 3 (2002), Pagination: 293-301
Abstract
The samples used in this study are mollusc shells that were obtained from core sediments taken at 60 m water depths from the Southern Marmara Sea, close to the Kapidag Peninsula. The ages of samples ranged from Late Pleistocene to Early Holocene. In two cores, analysis were carried out on mollusc fossils for δ18O and δ13C isotopes. The δ18O and δ13C values of mollusc shells ranged between 0.20 %O and -3.0 %O and 0.08 %O and 0.8 1 %o, respectively. δ18O and δ13C display independent and different values that are inversely related with each other. The lowest δ18O values are associated with highest δ13C values. The variations in oxygen and carbon isotopic values are independent from each other and reflect changes in palaeogeographic environment. The varying isotopic temperature values between 1 3.0°C and 27.6°C proves changing palaeoenvironmental conditions in the basin. The isotopic temperature and δ18O and δ13C data for the Late Quaternary times (for W2-H L1) in the Marmara Sea are obtained in this study for the first time.
Keywords
Stable Isotopes, Carbon And Oxygen, Palaeotemperatures, Mollusc Shells, Marmara Sea.
