Here we present the first tephrostratigraphic, palaeomagnetic, and multiproxy data from a new ~98 m deep sediment core retrieved from the Fucino Basin, central Italy, spanning the last ~430 kyr. Palaeoenvironmental proxy data (Ca-XRF, gamma ray and magnetic susceptibility) show a cyclical variability related to interglacial-glacial cycles since the Marine Isotope Stage (MIS) 12-MIS 11 transition. More than 130 tephra layers are visible to the naked eye, 11 of which were analysed (glass-WDS) and successfully correlated to known eruptions and/or other equivalent tephra. In addition to tephra already recognised in the previously investigated cores spanning the last 190 kyr, we identified for the first time tephra from the eruptions of: Tufo Giallo di Sacrofano, Sabatini (288.0 ± 2.0 ka); Villa Senni, Colli Albani (367.5 ± 1.6 ka); Pozzolane Nere and its precursor, Colli Albani (405.0 ± 2.0 ka, and 407.1 ± 4.2 ka, respectively) and Castel Broco, Vulsini (419e490 ka). The latter occurs at the bottom of the core and has been 40Ar/39Ar dated at 424.3 ± 3.2 ka, thus providing a robust chronological constrain for both the eruption itself and the base of the investigated succession. Direct 40Ar/39Ar dating and tephra geochemical fingerprinting provide a preliminary radioisotopic-based chronological framework for the MIS 11-MIS 7 interval, which represent a foundation for the forthcoming multiproxy studies and for investigating the remaining ~110 tephra layers that are recorded within this interval. Such future developments will contribute towards an improved MIS 11-MIS 7 Mediterranean tephrostratigraphy, which is still poorly explored and exploited.

Extending the tephra and palaeoenvironmental record of the Central Mediterranean back to 430 ka. A new core from Fucino Basin, Central Italy / Giaccio, B.; Leicher, N.; Mannella, G.; Monaco, L.; Regattieri, E.; Wagner, B.; Zanchetta, G.; Gaeta, M.; Marra, F.; Nomade, S.; Palladino, D. M.; Pereira, A.; Scheidt, S.; Sottili, G.; Wonik, T.; Wulf, S.; Zeeden, C.; Ariztegui, D.; Cavinato, G. P.; Dean, J. R.; Florindo, F.; Leng, M. J.; Macrì, P.; Niespolo, E.; Renne, P. R.; Rolf, C.; Sadori, L.; Thomas, C.; Tzedakis, P. C.. - In: QUATERNARY SCIENCE REVIEWS. - ISSN 0277-3791. - 225:(2019), pp. 1-21. [10.1016/j.quascirev.2019.106003]

Extending the tephra and palaeoenvironmental record of the Central Mediterranean back to 430 ka. A new core from Fucino Basin, Central Italy

Monaco L.;Gaeta M.;Palladino D. M.;Sottili G.;Sadori L.;
2019

Abstract

Here we present the first tephrostratigraphic, palaeomagnetic, and multiproxy data from a new ~98 m deep sediment core retrieved from the Fucino Basin, central Italy, spanning the last ~430 kyr. Palaeoenvironmental proxy data (Ca-XRF, gamma ray and magnetic susceptibility) show a cyclical variability related to interglacial-glacial cycles since the Marine Isotope Stage (MIS) 12-MIS 11 transition. More than 130 tephra layers are visible to the naked eye, 11 of which were analysed (glass-WDS) and successfully correlated to known eruptions and/or other equivalent tephra. In addition to tephra already recognised in the previously investigated cores spanning the last 190 kyr, we identified for the first time tephra from the eruptions of: Tufo Giallo di Sacrofano, Sabatini (288.0 ± 2.0 ka); Villa Senni, Colli Albani (367.5 ± 1.6 ka); Pozzolane Nere and its precursor, Colli Albani (405.0 ± 2.0 ka, and 407.1 ± 4.2 ka, respectively) and Castel Broco, Vulsini (419e490 ka). The latter occurs at the bottom of the core and has been 40Ar/39Ar dated at 424.3 ± 3.2 ka, thus providing a robust chronological constrain for both the eruption itself and the base of the investigated succession. Direct 40Ar/39Ar dating and tephra geochemical fingerprinting provide a preliminary radioisotopic-based chronological framework for the MIS 11-MIS 7 interval, which represent a foundation for the forthcoming multiproxy studies and for investigating the remaining ~110 tephra layers that are recorded within this interval. Such future developments will contribute towards an improved MIS 11-MIS 7 Mediterranean tephrostratigraphy, which is still poorly explored and exploited.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1324345
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