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Journal of Petrology | Volume 44 | Number 8 | Pages 1345-1347 | 2003
© Oxford University Press 2003
Introduction to the Thematic Issue on Montserrat
Environment Centre, Lancaster University
| The first 150 words of the full text of this article appear below. |
The 1995present (February 2003) eruption of the Soufrière Hills volcano, Montserrat, has been monitored and studied in exceptional detail. The volcanic hazard monitoring programme of the Montserrat Volcano Observatory has been complemented by, inter alia, ground deformation studies, earthquake seismology, measurements of dome volume and gas emission measurements using both COSPEC and FTIR. Petrographic examination and geochemical analyses of eruptive products have proceeded continuously from the earliest stages of the eruption. The papers in this thematic issue have drawn on a wide range of modern petrological techniques to provide important new insights into the processes occurring in the magma chamber prior to and during the eruptive activity, in the upper-crustal conduit and in the dome itself.
The petrology of the eruptive rocks is relatively simple. The dominant lithology is andesite in the range
5761 wt % SiO2, with the phenocryst assemblage (
4555 wt % modally) plagioclase (An9348