The zone 1440 AD eruption of the soufriere of Guadeloupe (Lesser Antilles) : an experimental determination of the pre-eruptive consitions of the andesitic magma body. - Archive ouverte HAL Access content directly
Conference Papers Year : 2004

The zone 1440 AD eruption of the soufriere of Guadeloupe (Lesser Antilles) : an experimental determination of the pre-eruptive consitions of the andesitic magma body.

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Abstract

The 1440 AD eruption of the Soufriere of Guadeloupe (Lesser Antilles arc) is characterized by a dramatic change of the chemical composition of erupted products, from andesitic (clear pumices, 61-62 wt% SiO2) to basaltic andesite (dark scoria, 55-56 wt% SiO2). This compositional sequence is interpreted to reflect the tapping of a silicic magma body remobilised following the arrival of a mafic magma batch. The conditions of equilibrium ( T, P, fO2, melt H2O content) within the andesite body prior to the mixing event were determined from a coupled ineralogical/petrological and experimental approach.
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Dates and versions

hal-00078539 , version 1 (14-06-2006)

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  • HAL Id : hal-00078539 , version 1

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Stéphane Poussineau, Michel Pichavant, Jean-Louis Bourdier. The zone 1440 AD eruption of the soufriere of Guadeloupe (Lesser Antilles) : an experimental determination of the pre-eruptive consitions of the andesitic magma body.. Geophysical Research Abstracts, 2004, Nice, France. ⟨hal-00078539⟩
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