The study of climate and oceanographic setting in the recent past plays and important roleto prevent what we can expect for the future. This research project is based on the studyof two sedimentary cores (ATA13-OF-KT1 and ATA13-OF-KT18), collected duringOCEANOGRAFLU 2013 oceanographic survey in Atlantic Ocean, southwestward of theAzores Islands, near the Mid-Atlantic ridge. In agreement with members ofPaleobiodiversity and Paleoenvironmental Research Center belonging to the Departmentof Earth History (MNHN) of Paris, I’ll have to study these two cores, under the supervisionof Prof. Annachiara Bartolini, member of this research unit, and Prof. Antonio Caruso(DiSTeM, University of Palermo). This research project is based on the analysis ofpercentages of abundance of planktonic foraminiferal assemblages, contained in thesesedimentary cores. The aim is to establish the combined effects of climatic changes andridge activity on planktonic foraminiferal assemblages, during the Upper Pleistocene –Holocene. These two cores will be sliced every cm and the obtained samples will beanalyzed in order to recognize the composition of planktonic foraminiferal assemblagesand to estimate the fluctuation in abundance of each species, by counting of 300specimens for sample.Furthermore geochemical analysis will be performed, regarding:· Mg/Ca and Sr/Ca calcite ratios of foraminiferal shells;· Isotopic composition of foraminiferal shells, regarding δ18O and δ13C;· Radiometric dating (14C) to define a correct “age-model”.All these data will be correlated to carry out a paleoclimatic and paleoceanographicreconstruction and in order to obtain an “event stratigraphy” of this sector of the AtlanticOcean, during the Upper Pleistocene – Holocene.
|Numero di pagine||1|
|Stato di pubblicazione||Published - 2014|