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Particles from the plume of Popocatépetl volcano, Mexico – the FESEM/EDS approach

By
J. H. Obenholzner
J. H. Obenholzner
Naturhistorisches MuseumlMineralogie, Postfach 417, A-1014 Vienna, Austria.(e-mail: obenholzner@al.net)
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H. Schroettner
H. Schroettner
Zentrum fuer Elektronenmikroskopie, TU-Graz, Steyrerg. 17, A-8010 Austria. (hartmuth.schroettner@felmi-zfe.at)
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P. Golob
P. Golob
Zentrum fuer Elektronenmikroskopie, TU-Graz, Steyrerg. 17, A-8010 Austria. (hartmuth.schroettner@felmi-zfe.at)
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H. Delgado
H. Delgado
Instituto de Geofisica, UN AM, Coyoacan 04510, Mexico D.F., Mexico. (e-mail: hugo@tonatiuh.igeofcu.unam.mx)
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Published:
January 01, 2003

Abstract

Magma-wall-rock interaction contributes gases to evolving magmatic systems, and removes volatiles into the country rock. These processes happen at depth, far away from direct observation. Micro-analysis of particles collected from volcanic plumes can provide information about these processes. For Popocatépetl volcano, scanning electron microscope (SEM) and field emission gun SEM (FESEM/EDS) analysis of contact-metamorphosed particles from fallout ash reveal the presence of wollastonite, hercynite and glass of non-volcanic, contact-metamorphic origin. Condensates from the passively degassing plume show a wide variety of chemical elements and are rich in phosphorus, indicating a possible non-magmatic source for this element.

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Contents

Geological Society, London, Special Publications

Volcanic Degassing

C. Oppenheimer
C. Oppenheimer
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D. M. Pyle
D. M. Pyle
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J. Barclay
J. Barclay
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Geological Society of London
Volume
213
ISBN electronic:
9781862394612
Publication date:
January 01, 2003

GeoRef

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