부산대학교 도서관

The unraveling of the geological processes, which are recorded in the chemical and isotopic fingerprinting of the deep-sea sediments, demands the introduction of a sensitive parameter over time. The aim of this study is to analyze the deep-sea sediments from the Black Sea, using the stable isotopic and elemental content. For this purpose, 41 sediment samples were taken from five cores, having lengths between 2.66 and 4.24 m using a gravitational core. Additional nine samples were taken from three cores using a multicore equipment. All samples were collected during a two weeks marine expedition, in the beginning of September 2018, in the western part of the Black Sea. The isotopic values (δ13C; δ18O) and elemental concentrations (macro-, micro-elements, and heavy metals) were determined in the sediments samples, along with δ18O and δ2H in extracted water from sediments. Preliminary results obtained from sediments show that δ13C values of the bulk organic component range between -27.9 ‰ and -22.3 ‰ with a mean value of -25.3 ‰, while for inorganic component, the δ13C and δ18O values range between -4.3 ‰ and 1.5 ‰ for δ13C, and from -10.6 ‰ to -0.07 ‰ for δ18O, respectively, with a mean of -0.32 for δ13C and -5.74 ‰ for δ18O, versus Vienna Pee Dee Belemnite (VPDB) international standard. In the extracted water, the δ18O variation range was between -3.5 and 1.6 ‰, with a mean of -1.7 ‰, while the δ2H values range between -32.4 ‰ and -16.5 ‰ with a mean of -23.1 ‰. The results of this research will be the basis of the new paleoclimatic reconstruction using stable isotopes in the deep-sea sediments from the Black Sea. [ABSTRACT FROM AUTHOR]