Preliminary chemical and petrographic results of the march-april "El Chichon" volcanics
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...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1982 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/230 |
| Acceso en línea: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/230 |
| Access Level: | acceso abierto |
| Palabra clave: | Petrografía Química Volcán Chichón Chiapas-México Petrography Chemistry Chichón Volcano Chiapas-Mexico |
| Sumario: | 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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