Timescales of magma residence at Campi Flegrei, Italy
Abstract
Campi Flegrei caldera has produced many large explosive eruptions, including the largest in Europe in the last 200 kyrs. There have been more than 60 violent Strombolian-Vulcanian through to Plinian eruptions in the last 15 kyrs. Recent changes in ground displacement and composition of fumarole fluids indicate the caldera is still active and suggest that magma resides in the upper crust (Chiodini et al., 2012). Here we used zoned crystals within the post-15 ka eruption deposits to assess the timescales of upper crustal magma residence at Campi Flegrei. We present details of the major and trace element composition of the crystals, and diffusion chronometry results. These data provide detail on the crystallisation timescales and the changing nature of the magmatic system. It is clear that the magmas that fuel the eruptions are assembled in an open system and that upper crustal residence for most of the melt is short. Chiodini, G., Caliro, S., De Martino, P., Avino, R., Gherardi, F. 2012. Early signals of new volcanic unrest at Campi Flegrei caldera? Insights from geochemical data and physical simulations. Geology. http://dx.doi.org/10.1130/G33251.1
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.V13D2885S
- Keywords:
-
- 3618 MINERALOGY AND PETROLOGY / Magma chamber processes;
- 3640 MINERALOGY AND PETROLOGY / Igneous petrology;
- 8440 VOLCANOLOGY / Calderas