Dissolution/crystallization kinetics recorded in the 2002–2003 lavas of Stromboli (Italy) |
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| Authors: | Alessandro Fornaciai Patrizia Landi Pietro Armienti |
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| Institution: | (1) Istituto Nazionale di Geofisica e Vulcanologia, sezione di Pisa, via della Faggiola 32, 56126 Pisa, Italy;(2) Dipartimento di Scienze della Terra, University of Pisa, via Santa Maria 56, 56126 Pisa, Italy |
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| Abstract: | On 28 December 2002, new vents opened on the flanks of Stromboli, just below the summit craters, interrupting the persistent
activity of the volcano with a 7-month-long effusive eruption. We here report on the plagioclase size distribution (PlgSD)
in lava samples collected following the chronology of the 2002–2003 eruption. Data reveal a linear PlgSD similar to that found
in samples of normal Stromboli activity, indicating that the switch from Strombolian explosive to effusive activity is not
associated with changes in texture. Nevertheless, the crystal size distribution slopes and intercepts exhibit slight sinusoidal
temporal variations that are here ascribed to a magma supply mechanism able to induce “resonance” in the crystal size distribution,
with an amplitude that depends on the supply rate. |
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| Keywords: | Plagioclase Crystal size distribution Stromboli 2002– 2003 eruption Magma supply rate Effusive activity Crystallization |
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