Multi-stage magma mixing in the pre-caldera series of Fuego de Colima volcano

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Published: Oct 1, 1993
DOI: https://doi.org/10.22201/igeof.00167169p.1993.32.4.606
Keywords:
Magma chamber, Andesites, Mixing, Crystal fractionation, Fuego de Colima Volcano, Mexico

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Claude Robin
Unite de Recherches Marges Actives et Lithosphere Oceanique, Noumea, New Caledonia
Alain Potrel
Centre Armoricain d'Etude structurale des Socles, Universite de Rennes, Rennes (France)

Abstract

Mineralogical and geochemical data from pre-caldera lavas of Volcán Fuego de Colima indicate that both fractional crystalization and mixing processes occurred together. Three types of mixing are evidenced: (i): Mixing between fresh input of mafic magma and olivine-clinopyroxene cumulates in the lower part of the magma chamber. (ii): Mixing, within the shallow chamber, between this deep juvenile magma (previously differentiated by crystal fractionation or not, ol-cpx enriched or not in an deeper magma chamber) and a differentiated magma, andesitic or dacitic in composition. (iii): mixing by convection between magmas previously differentiated by mixing and/or crystal fractionation at different levels in the magma chamber. 

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Robin, C., & Potrel, A. (1993). Multi-stage magma mixing in the pre-caldera series of Fuego de Colima volcano. Geofisica Internacional, 32(4), 605–615. https://doi.org/10.22201/igeof.00167169p.1993.32.4.606
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Vol. 32 No. 4 (1993): October 1, 1993
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