Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/13369
Authors: Petrosino, Paola* 
Arienzo, Ilenia* 
Mazzeo, Fabio Carmine* 
Natale, J* 
Petrelli, Maurizio* 
Milia, Alfonsa* 
Perugini, Diego* 
D’Antonio, M.* 
Pascolis, N* 
Title: The San Gregorio Magno lacustrine basin (Campania, southern Italy): improved characterization of the tephrostratigraphic markers based on trace elements and isotopic data
Journal: Journal of Quaternary Science 
Series/Report no.: 6/34 (2019)
Publisher: John Wiley & Sons
Issue Date: 2019
DOI: 10.1002/jqs.3107
Keywords: isotope geochemistry
LA‐ICP‐MS
Neapolitan volcanoes
San Gregorio Magno Basin
Sr and Nd isotopes
tephra
Abstract: Central–southern Italy is one of the most suitable areas in the world for tephrostratigraphic studies, owing to the numerous volcanic sources with explosive activity during the Pleistocene. This work presents a systematic investigation of the chemical (trace elements) and isotopic (Sr and Nd) compositions of the main tephra markers within lacustrine sediments of the San Gregorio Magno Basin (Campania, southern Italy). This study: (i) provides full geochemical (trace elements and isotopes) characterization of eight significant Upper Pleistocene marker layers (X‐6, X‐5, C‐22, MEGT/ Y‐7, CI/Y‐5, C‐10, Y‐3, NYT/C2) widely dispersed over the Mediterranean area; (ii) proposes a new tephra marker for Marine Isotope Stage 7, dated to 240 ka; and (iii) refines the correlations of tephra levels belonging to the investigated sequence. This study highlights that in most cases the Nd isotope composition of the glass and Sr isotope composition of the coexisting minerals are more reliable than 87Sr/86Sr of the glass, and hence is a more helpful as a further tool for tephrostratigraphic correlations, as recently proposed in the literature. Moreover, this study is a first step towards the construction of a complete geochemical database for future tephra investigations in the Mediterranean area.
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