Water content of 1997 vulcanian pumices at Soufriere Hills Volcano Montserrat and implications on pre-eruptive conduit conditionsReport as inadecuate




Water content of 1997 vulcanian pumices at Soufriere Hills Volcano Montserrat and implications on pre-eruptive conduit conditions - Download this document for free, or read online. Document in PDF available to download.

1 ISTO - Institut des Sciences de la Terre d-Orléans

Abstract : A series of 88 Vulcanian explosions occurred at Soufriere Hills Volcano Montserrat between August and October 1997. Conduit conditions prior to each explosion have been explored by analysing representative textures of the eruptive products. We used quantitative analysis of water content in residual glasses matrix glass in order to constrain the sampling depth of these ejecta. Studied textures cover the natural range of Vulcanian products and include homogeneous fallout pumices, glassy blocks, banded rocks and dome samples. To better link water content to structural level, we performed new water solubility experiments at low pressure less than 750 bars and high temperature 850-1050°C in internally heated pressure vessel on synthetic rhyolitic glass of the same composition than the natural matrix glass.





Author: Stéphane Poussineau - Laurent Arbaret - Alain Burgisser -

Source: https://hal.archives-ouvertes.fr/



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