Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico

The March 29 to April 4, 1982 eruption of El Chichón volcano in southeastern Mexico was characterized by a complex interplay between magmatic and phreatomagmatic eruptive events, that were responsible for the generation of plinian columns and concentrated and diluted density currents. Revision of th...

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Autores: Scolamacchia, Teresa, Macías, José Luis
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Revista Mexicana de Ciencias Geológicas
Idioma:inglés
OAI Identifier:oai:ojs.rmcg.geociencias.unam.mx:article/852
Acceso en línea:http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852
Access Level:acceso abierto
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spelling Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, MexicoDistribución y estratigrafía de depósitos producidos por oleadas piroclásticas durante la erupcion de 1982 del volcán El Chichón, Chiapas, MéxicoScolamacchia, TeresaMacías, José LuisThe March 29 to April 4, 1982 eruption of El Chichón volcano in southeastern Mexico was characterized by a complex interplay between magmatic and phreatomagmatic eruptive events, that were responsible for the generation of plinian columns and concentrated and diluted density currents. Revision of the stratigraphy indicates that the interaction between magma and hydrothermal acid water played an important role during the last phases of the eruption. Diluted density currents were widely dispersed, mainly to the eastern side of the volcano due to the particular topographic conditions in this area. The overall distribution of pyroclastic surge deposits reflects the dispersal of fallout deposits determined by the direction of tropospheric (ENE) winds at the time of the eruption. This observation suggests that near-ground winds were strong and blowing in the same direction as high altitude (<18 km) winds, thus enhancing the dispersion of the vanishing portions of the pyroclastic density currents.La erupción del volcán El Chichón en el sureste de México, ocurrida del 29 de Marzo al 4 de Abril de 1982, se caracterizó por una alternancia compleja entre eventos magmáticos y freatomagmáticos que generaron columnas plinianas, flujos y oleadas piroclásticas. La estratigrafía de los depósitos indica que la interacción entre magma y agua hidrotermal jugó un papel importante durante las últimas fases de la erupción. Las oleadas piroclásticas fueron ampliamente distribuidas hacia el oriente del volcán debido a las condiciones topográficas presentes en esta dirección. La distribución general de los depósitos de oleada piroclástica refleja la distribución de los depósitos de caída, la cual fue determinada por la dirección de los vientos troposféricos (ENE) durante la erupción. Esto sugiere que los vientos cercanos al terreno eran fuertes y soplaban en la misma dirección que los vientos superiores (< 18 km), influenciando la distribución de las porciones más diluidas de las oleadas piroclásticas.Universidad Nacional Autónoma de México2018-04-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852Revista Mexicana de Ciencias Geológicas; Vol 22 No 2 (2005); 159-180Revista Mexicana de Ciencias Geológicas; Vol 22 No 2 (2005); 159-1802007-29021026-8774reponame:Revista Mexicana de Ciencias Geológicasinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMenghttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852/859info:eu-repo/semantics/openAccessoai:ojs.rmcg.geociencias.unam.mx:article/8522024-08-16T19:51:47Z
dc.title.none.fl_str_mv Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
Distribución y estratigrafía de depósitos producidos por oleadas piroclásticas durante la erupcion de 1982 del volcán El Chichón, Chiapas, México
title Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
spellingShingle Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
Scolamacchia, Teresa
title_short Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
title_full Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
title_fullStr Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
title_full_unstemmed Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
title_sort Distribution and stratigraphy of deposits produced by diluted pyroclastic density currents of the 1982 eruption of El Chichón volcano, Chiapas, Mexico
dc.creator.none.fl_str_mv Scolamacchia, Teresa
Macías, José Luis
author Scolamacchia, Teresa
author_facet Scolamacchia, Teresa
Macías, José Luis
author_role author
author2 Macías, José Luis
author2_role author
description The March 29 to April 4, 1982 eruption of El Chichón volcano in southeastern Mexico was characterized by a complex interplay between magmatic and phreatomagmatic eruptive events, that were responsible for the generation of plinian columns and concentrated and diluted density currents. Revision of the stratigraphy indicates that the interaction between magma and hydrothermal acid water played an important role during the last phases of the eruption. Diluted density currents were widely dispersed, mainly to the eastern side of the volcano due to the particular topographic conditions in this area. The overall distribution of pyroclastic surge deposits reflects the dispersal of fallout deposits determined by the direction of tropospheric (ENE) winds at the time of the eruption. This observation suggests that near-ground winds were strong and blowing in the same direction as high altitude (<18 km) winds, thus enhancing the dispersion of the vanishing portions of the pyroclastic density currents.
publishDate 2018
dc.date.none.fl_str_mv 2018-04-25
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852
url http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/852/859
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Ciencias Geológicas; Vol 22 No 2 (2005); 159-180
Revista Mexicana de Ciencias Geológicas; Vol 22 No 2 (2005); 159-180
2007-2902
1026-8774
reponame:Revista Mexicana de Ciencias Geológicas
instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron:UNAM
instname_str UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron_str UNAM
institution UNAM
reponame_str Revista Mexicana de Ciencias Geológicas
collection Revista Mexicana de Ciencias Geológicas
repository.name.fl_str_mv
repository.mail.fl_str_mv
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