Miss Ellen McGowan

PhD student, Sessional - Teaching

Conduit processes of rhyolitic volcanoes
Rhyolitic volcanoes are arguably the most hazardous type of volcano. Their eruption behaviour can be changeable and difficult to predict, which complicates the implementation of hazard mitigation strategies. Eruption behaviour is partly controlled by processes that take place as magma ascends though the conduit to the vent. To date, insights into conduit processes have mostly been obtained from observations of vent processes (these studies are limited because rhyolitic eruptions are seldom observed) and from studying pyroclasts and lava. The aim of my PhD research is to gain insight into how degassing, emplacement and deformation control eruption behaviour. To do this I am studying the textures and geochemistry inside the now-inactive conduits of Icelandic volcanoes.