HR: 0800h
AN: V41B-0611    [Abstracts]
TI: Silicate Particles in the Mt Etna and Masaya Plumes
AU: * Martin, R S
EM: rsm45@cam.ac.uk
AF: Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom
AU: Mather, T A
EM: tamsin.mather@earth.ox.ac.uk
AF: Department of Earth Sciences, Oxford, Parks Road, Oxford, OX1 3PR, United Kingdom
AU: Pyle, D M
EM: david.pyle@earth.ox.ac.uk
AF: Department of Earth Sciences, Oxford, Parks Road, Oxford, OX1 3PR, United Kingdom
AU: Power, M
EM: mattpower@btinternet.com
AF: Camborne School of Mines, University of Exeter, Penryn Campus, Cornwall, TR10 9EZ, United Kingdom
AU: Allen, A G
EM: a.g.allen@bham.ac.uk
AF: School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
AU: Aiuppa, A
EM: aiuppa@unipa.it
AF: CFTA, Università degli Studi di Palermo, Via Archirafi 36, Palermo, 90123, Italy
AU: Tsanev, V
EM: vip20@cam.ac.uk
AF: Department of Geography, Cambridge, Downing Place, Cambridge, CB2 3EN, United Kingdom
AU: Oppenheimer, C
EM: co200@cam.ac.uk
AF: Department of Geography, Cambridge, Downing Place, Cambridge, CB2 3EN, United Kingdom
AU: Horwell, C J
EM: claire.horwell@durham.ac.uk
AF: Institute of Hazard and Risk Research, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
AU: Ward, E P
EM: epww2@cam.ac.uk
AF: Deparment of Materials Science, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, United Kingdom
AB: We present an overview of our work concerning the emission of fine silicate particles from active volcanoes. Size distributions of particles collected from the plumes of Mt Etna and Masaya were measured using automated scanning electron microscopy (QemSCAN). These size distributions were found to be lognormal and centred around 1 micron. These results were used to estimate emission fluxes of ~60 kg/day from Masaya and ~7000 kg/day from Mt Etna. These silicate particles are expected to have extended atmospheric lifetimes due to their small size and relative unreactivity. Fine silicate particles in ice-cores may therefore prove useful indicators of the extent of persistently active volcanism over time.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 8409 Atmospheric effects (0370)
DE: 8419 Volcano monitoring (7280)
DE: 8430 Volcanic gases
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting