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AGU Fall Meeting 2009

Activity: Conference participationParticipation in conference

10/12/2009

Crystals, Glass, Cracks, and Bubbles: Degassing and Crystallization in Silicic Conduits and Lavas

The degassing and crystallization of magma during ascent and emplacement has profound implications for the mechanisms of both explosive and effusive silicic eruptions. The end product is lava or pumice that contains bubbles, crystals, cracks and glass in varying proportions. Details of the processes driving these textural changes, their timescales and consequences can be elucidated using textural and geochemical analysis, experimentation and modelling approaches.
Key questions to address include how gas escapes from magma in the viscous and brittle regimes, how volatiles resorb and bubbles collapse, how rapidly magma ascends during different styles of activity, how crystallisation affects the ductile/brittle rheology of magma and how gas loss and crystal growth are interrelated.
We welcome all contributions addressing these and related topics, especially those that combine natural observations with well-constrained experiments or numerical models.

Related Event Information

EventConference
TitleAGU Fall Meeting 2009
Date10/12/09 → …
CountryUnited States
CitySan Francisco