Preliminary chemical and petrographic results of the march-april "El Chichon" volcanics

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Published: Jan 1, 1982
DOI: https://doi.org/10.22201/igeof.00167169p.1982.21.1.1073
Keywords:
Petrography, Chemistry, Chichón Volcano, Chiapas-Mexico

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R. M. Prol Ledesma
Universidad Nacional Autónoma de México, Instituto de Geofísica, Ciudad Universitaria, Alcaldía Coyoacán 04510, México CDMX, México
https://orcid.org/0000-0002-1053-6533
F. Medina
Universidad Nacional Autónoma de México, Instituto de Geofísica, Ciudad Universitaria, Alcaldía Coyoacán 04510, México CDMX, México
D. Ya. Choporov
Geological Institute, Acad. Sci. USSR.
D. I. Frikh K.
Inst. of Geology, Mineralogy, Petrography and Geochemistry of ore deposits Acad. Sci. USSR.
G. N. Muravitskaya
Inst. of Geology, Mineralogy, Petrography and Geochemistry of ore deposits Acad. Sci. USSR.
B. G. Polak
Geological Institute, Acad. Sci. USSR
M. I. Stepanets
Geological Institute, Acad. Sci. USSR

Abstract

Chemical and petrographic analyses were done for three samples of the products of "El Chichon", March-April eruption. Chemical analyses yield an andesitic composition for the magma with a high gas-content. Petrographic analyses show anhydrite in two of the samples, this is interpreted as a result of contamination with sulphur waters and evaporites, observed in the area. Obtained results may indicate a very shallow magma chamber. The total mass of the water soluble components ejected was calculated to be of the order of 31.8 x 106 Ton., assuming a total mass of the ejecta of 0.5 km3.

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Prol Ledesma, R. M., Medina, F., Choporov, D. Y., Frikh K., D. I., Muravitskaya, G. N., Polak, B. G., & Stepanets, M. I. (1982). Preliminary chemical and petrographic results of the march-april "El Chichon" volcanics. Geofisica Internacional, 21(1), 1–10. https://doi.org/10.22201/igeof.00167169p.1982.21.1.1073
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Vol. 21 No. 1 (1982): January 1, 1982
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