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Bulletin of Volcanology

, Volume 50, Issue 1, pp 47–57 | Cite as

The eruptive history of Pantelleria (Sicily channel) in the last 50 ka

  • L. Civetta
  • Y. Cornette
  • P. Y. Gillot
  • G. Orsi
Article

Abstract

Six silicic eruptive cycles have been recognized in the last 50 ka at Pantelleria. The products of each cycle exhibit a compositional variation from pantellerite to less peralkaline rhyolite or to trachyte. The relationships between the range of chemical variation, the erupted volume and the time of eruptions, allow us to estimate an average differentiation rate of 5% crystal fractionation per 1000 years and a constant long-term rate of magma discharge of 0.1 km3 per 1000 years. Pressure increase in the magma chamber caused by the addition of new magma, accumulation of highly-differentiated, volatile-rich magma in the roof zone and a concomitant build-up of a vapour phase, is postulated as a possible triggering mechanism for eruptions.

Keywords

Fractionation Vapour Phase Pressure Increase Sedimentology Differentiation Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • L. Civetta
    • 1
  • Y. Cornette
    • 2
  • P. Y. Gillot
    • 2
  • G. Orsi
    • 1
  1. 1.Dipartimento di Geofisica e VulcanologiaUniversità di NapoliNapoliItaly
  2. 2.Centre des Faibles Radioactivités (CEA/CNRS)Gif sur YvetteFrance

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