Combining textural and geochemical investigations to explore the dynamics of magma ascent during Plinian eruptions: a Somma–Vesuvius volcano (Italy) case study

  • L. PappalardoEmail author
  • G. Buono
  • S. Fanara
  • P. Petrosino
Original Paper


Trigger mechanisms and syn-eruptive processes of Plinian eruptions are poorly understood especially in the case of mafic powerful events. In the last decades, the combined geochemical and textural studies on volcanic rocks have proven to be fundamental tools for exploring the dynamics of magma ascent in volcanic conduits and for improving our ability to interpret volcano-monitoring signals and assess hazard. In this case study, we quantitatively investigate 2D and 3D micro-textural, geochemical, and isotopic features of pyroclastic rocks erupted during the Pomici di Base Plinian eruption (22 ka), the generally acknowledged first and most powerful event of the Somma–Vesuvius volcano. A peculiar aspect of this eruption is its high intensity that remained stable during the entire Plinian phase despite the strong magma compositional variation towards mafic terms. We infer that the transfer of magma towards the surface was intensified by the occurrence of rapid vesiculation pulses driven by limestone assimilation (skarn recycling) during magma ascent through the carbonatic bedrock. We conclude that limestone assimilation can hence be a syn-eruptive process, able to trigger further gas nucleation with deep impact on the eruption intensity, particularly crucial in the case of mafic/intermediate magma compositions.


Plinian eruptions Syn-eruptive processes Limestone assimilation X-ray computed microtomography 



The authors wish to thank I. Arienzo (INGV-OV), R. de Gennaro (Università di Napoli) and M. Nazzarini (INGV-Rome) for essential helps during isotopic, SEM and EMPA analyses, respectively. We are thankful to Ciro Sepe (DiSTAR, Università di Napoli) for his fundamental support during fieldwork. Finally, the authors gratefully acknowledge two anonymous reviewers, whose valuable suggestions greatly contributed to improve the manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interests.

Supplementary material

Supplementary material 1 (AVI 4954 KB)

Supplementary material 2 (AVI 7238 KB)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • L. Pappalardo
    • 1
    Email author
  • G. Buono
    • 1
    • 2
  • S. Fanara
    • 3
  • P. Petrosino
    • 2
  1. 1.Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli-Osservatorio VesuvianoNapoliItaly
  2. 2.DiSTAR-Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse-Università degli Studi di Napoli Federico IINapoliItaly
  3. 3.Institut für Experimentelle und Angewandete Mineralogie, Georg-August Universität GöttingenGöttingenGermany

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