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| Titel |
Eastern Mediterranean high resolution paleoclimate investigations using south Adriatic finely laminated sediment |
| VerfasserIn |
B. Robert, T. Jilbert, G. J. De Lange |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026550
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| Zusammenfassung |
| Sediments from the Gulf of Taranto area, southern Italy, offer the possibility to very high
resolution paleo-reconstructions of the eastern Mediterranean climate variability
(MOCCHA project). Riverine waters, with the Po river as its main contributor,
are streaming south-eastward in the Adriatic along the eastern Italian coastline,
before entering the bay of Taranto and discharging their suspended material as
sediments on the shelves. Multicore GeoB 107-39-03 was taken in 2006, in the
central part of the straits of Otranto, south Adriatic, on a potential monitoring site
for input variability of continental waters to the Gulf of Taranto. The sediment
exhibits on its total length sub-milimetric scale laminae potentially connected to
high-frequency climate/hydrology variability. Conventional geochemical analyses
were carried out on discrete samples (XRF, ICP-OES, organic C/N, δ13C), and
a novel technique was used to investigate the sediment chemistry at the laminae
scale: the sediment has been resin-impregnated to enable laser ablation coupled to
ICP-MS analyses (LA-ICP-MS). This powerful method recently developed at the
University of Utrecht (Jilbert et al., 2008) permits extremely high resolution geochemical
profiling of the laminated sediment, to unravel the forcing mechanisms generating
the laminae. Furthermore, in order to compare the data to modern days sediment
geochemistry, a series of analyses were carried out on a batch of 46 surface samples, in
collaboration with the MOCCHA project partners (see Posters/Talks in Euromarc session
OS18).
This work is supported by the EUROCORES/EUROMARC Program of the European
Science Foundation (NWO.817.01.002 MOCCHA project). |
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