Fig. 1: Location of the NDT09 and NDT12 deep-sea cores
Fig 2: NDT09 deep-sea core
Fig. 3: NDT12 deep-sea core
WP2: Paleoclimatic and Paleoenvironmental reconstruction
Marine records - Marsili basin and Tiber river mouth cores
Marine sediment paleo-archives provide a large database of appropriate environmental and climate proxies for reconstructing past climate variations and forcing mechanisms associated with climate variability at diverse scales.
Marine record to study consists of the NDT09 and NDT12 deep-sea cores from the Tyrrhenian Sea recovered during the 2016 NextData cruise(www.nextdataproject.it). The cores will be investigated to obtain original paleoclimatic multi-proxy records with a powerful chronology over the last ~50 kyr; to reconstruct the runoff history of the Tiber river catchment basin over the last ~5 kyr years; to refine the geochemistry and geochronological of the volcanic activities of the Aeolian Arc and Campania Plain and their impact on marine environment; to confirm the reliability of reworked calcareous nannofossils as high-resolution runoff proxy in climatic provisional models
Numerous high resolution laboratory analyses will be carried out on the two cores, adopting diverse methodologies and techniques: X-ray fluorescence (CS-XRF) core scanning, Paleomagnetic and rock magnetic analyses; Micropaleontological analyses; Palynological characterization; Carbon content (TC/TIC/TOC) analyses (δ18O, δ13C, δ11B, 87Sr/86Sr, 143Nd/144Nd);Tephrochronology, Radiometric Absolute dating (14C; 40Ar-39Ar; U/Th; 210Pb,137Cs)
The NDT09 and NDT12 gravity cores will be analyzed for high-resolution XRF scanning, micropaleontological analyses, TC/TIC/TOC, paleomagnetic and rock magnetic investigations, tephrochronology, δ18O-δ13C stable isotopes composition of shells, δ11B record and 210Pb -137Cs radionuclides content.
NDT09
The 5.7 m long gravity core NDT09 was recovered at 3.359 m depth near the western rim of the Marsili Basin, in a site that corresponds to the 650/ODP 107 Site (Kastens et al., 1987). The age of an equivalent sequence of tephra layers sampled in the same basin (Tamburrino et al., 2016), permits to assume that the NDT09 core covers last ~50 kyr.
NDT12
The 3.8 m long core NDT12 was recovered at 100 m depth in front of Tiber river mouth. No data are available in the scientific literature for this sedimentary succession, anyway we assume that it could cover the last ~5 kyr, on the basis of similar records from Ombrone and Arno rivers mouth in Central Italy.