(a) K2O vs. CaO, (b) Sr vs. Nb and (c) Ba vs. Sr diagrams for the investigated Vesuvius 79 AD PDC juvenile whole-rock samples and for the juvenile components from the deposits of the Avellino eruption and of the A-P inter-Plinian activity (between the Avellino and Pompeii Plinian eruptions). Source of 79 AD literature data as in Fig. 4. Literature data for Avellino are from Barberi et al. (1981), Joron et al. (1987), Civetta et al. (1991), Civetta & Santacroce (1992), Ayuso et al. (1998), Cioni et al. (1998), Signorelli et al. (1999), Sulpizio et al. (2010) and Melluso et al. (2022). Literature data for the A-P activity are from Joron et al. (1987), Civetta & Santacroce (1992), Ayuso et al. (1998), Cioni et al. (1998), Andronico & Cioni (2002) and Piochi et al. (2006).
