X-ray microanalysis of volcanic ash

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)

Abstract

The 2010 eruption of Eyjafjallajokull volcano in Iceland demonstrated the disruptive nature of high-level volcanic ash emissions to the world's air traffic.

The chemistry of volcanic material is complex and varied. Different eruptions yield both compositional and morphological variation. Equally a single eruption, such as that in Iceland will evolve over time and may potentially produce a range of volcanic products of varying composition and morphology. This variability offers the petrologist the opportunity to derive a tracer to the origins both spatially and temporally of a single particle by means of electron microbeam analysis.

EPMA of volcanic ash is now an established technique for this type of analysis as used in tephrachronology. However, airborne particulate material may, as in the case of Eyjafjallajokull, result in a particle size that is too small and too dispersed for preparation of standard EPMA mounts. Consequently SEM-EDS techniques are preferred for this type of quantitative analysis. Results of quantitative SEM-EDS analysis yield data with a larger precision error than EPMA yet sufficient to source the original eruption. Uncoated samples analyzed using variable pressure SEM yield slightly poorer results at modest pressures.

Original languageEnglish
Title of host publicationEMAS 2011: 12TH EUROPEAN WORKSHOP ON MODERN DEVELOPMENTS IN MICROBEAM ANALYSIS
Place of PublicationBRISTOL
PublisherDeutsche Physikalische Gesellschaft & IOP Publishing Ltd
Pages-
Number of pages11
ISBN (Print)*****************
DOIs
Publication statusPublished - 2012
Event12th Workshop of the European-Microbeam-Analysis-Society (EMAS) on Modern Developments and Applications in Microbeam Analysis - Angers, France
Duration: 15 May 201119 May 2011

Conference

Conference12th Workshop of the European-Microbeam-Analysis-Society (EMAS) on Modern Developments and Applications in Microbeam Analysis
CountryFrance
CityAngers
Period15/05/1119/05/11

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