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El Chichon - Composition of plume gases and particlesAircraft measurements were made of trace gases, atmospheric particles, and condensed acid volatiles in the plume of El Chichon volcano, Chiapas, Mexico, in November 1982. Hydrogen sulfide was the primary gaseous sulfur species in the plume at the time of collection. Concentrations of 28 elements were determined by neutron activation analysis of particulate material from the plume. The volatile elements sulfur, chlorine, arsenic, selenium, bromine, antimony, iodine, tungsten, and mercury were enriched relative to bulk pyroclastic material by factors of 60 to 20,000. Arsenic, antimony, and selenium were associated predominantly with small (not greater than 3 micrometer) particles. Calcium and sodium were present almost exclusively on larger particles and aluminum and manganese were bimodally distributed. Ashladen particulate material injected into the stratosphere during the early violent eruptions was enriched by factors of 10 to 30 relative to ash in some of the same elements observed in the quiescent plume.
Document ID
19840031131
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kotra, J. P.
(Maryland Univ. College Park, MD, United States)
Finnegan, D. L.
(Maryland Univ. College Park, MD, United States)
Zoller, W. H.
(Maryland, University College Park, MD, United States)
Hart, M. A.
(Maryland Univ. College Park, MD, United States)
Moyers, J. L.
(Arizona, University Tucson, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
December 2, 1983
Publication Information
Publication: Science
Volume: 222
ISSN: 0036-8075
Subject Category
Geophysics
Accession Number
84A13918
Funding Number(s)
CONTRACT_GRANT: NAG1-200
Distribution Limits
Public
Copyright
Other

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