Magmatic architecture of dome-building eruptions at Volcan de Colima, Mexico
Por:
Lavallée Y., Varley N.R., Alatorre-Ibargüengoitia M.A., Hess, KU, Kueppers U., Mueller S., Richard D., Scheu B., Spieler O., Dingwell D.B.
Publicada:
1 ene 2012
Categoría:
Geochemistry and Petrology
Resumen:
Changes in the physical, chemical and rheological properties of ascending magma regulate the style of volcanic eruptions. Volcan de Colima's eruptive cycles of lava dome growth and explosions have been thoroughly monitored during the period 1998-2010 and provide a remarkable opportunity for deepening our understanding of the underlying processes responsible for the evolution of magma properties. Here, we integrate direct observation with analytical and experimental data to: (1) constrain the configuration of the shallow plumbing system and its influence on eruptive activity, (2) describe the rheological behaviour of the magma and (3) assess the conditions that lead to fragmentation and, ultimately, to explosive eruptions. The configuration of the shallow plumbing system was inferred from direct observation of extrusion sites and porosity of the erupted products. During the ongoing eruptive phase, magma was never extruded from a central vent: Both explosive and effusive activities were
Filiaciones:
Section for Mineralogy, Petrology and Geochemistry, Department of Earth and Environmental Sciences, Theresienstr. 41, 80333 Munich, Germany
Facultad de Ciencias, Universidad de Colima, Bernal Díaz del Castillo #340, Col. Villas San Sebastián, C.P. 28045 Colima, Col. Colima, Mexico
Earth and Environmental Sciences, Ludwig-Maximilians Universität, München, Germany
School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, BS81RJ Bristol, United Kingdom
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