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The 2009 paroxysmal explosions at Stromboli (Italy): magma mixing and eruption dynamics

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Abstract

Three small-scale paroxysmal explosions (also called major explosions) interrupted ordinary mild Strombolian activity at Stromboli on May 3, November 8 and 24, 2009. Products were largely confined to the summit area, except in the November 24 event, during which coarse pumiceous lapilli reached the coast. Emission of crystal-poor pumice closely mingled with crystal-rich products characterized the three events. The textural and chemical study of minerals and glassy matrices revealed that the two end-members are mingled together physically in the May 3 and November 24 pumice, whereas November 8 products contain heterogeneous glass with intermediate compositions derived from chemical mixing between crystal-rich and crystal-poor magmas. We here discuss the different degrees of interaction between the two magmas in the three explosions in terms of magma dynamics during small-scale paroxysms.

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Acknowledgments

This work has been supported by INGV-DPC programs. C. De Campos and J. Taddeucci are acknowledged for their constructive reviews.

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  1. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, via della Faggiola, 32, 56126, Pisa, Italy

    Sonia La Felice & Patrizia Landi

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  1. Sonia La Felice
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  2. Patrizia Landi
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Correspondence to Patrizia Landi.

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Editorial responsibility: D.B. Dingwell

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La Felice, S., Landi, P. The 2009 paroxysmal explosions at Stromboli (Italy): magma mixing and eruption dynamics. Bull Volcanol 73, 1147–1154 (2011). https://doi.org/10.1007/s00445-011-0502-z

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