Volcán El Chichón, Mexico: Pre-1982 S-rich eruptive activity

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Mapping and sampling of the interior of El Chichón Volcano was made possible by the exposures of the 1982 explosion crater. The 1-km-diameter, 200-m-deep crater exposes rocks produced during several eruptive episodes: volcanic domes, talus breccias, plinian airfall deposits and pyroclastic-flow deposits of compositionally similar alkalic hornblende-trachyandesites with phenocrysts of anhydrite. All of the rocks, except those leached of anhydrite, have extremely high S contents. El Chichón consists of a volcanic dome complex, airfall debris, and pyroclastic outflow sheets. Prior to 1982, its last major activity was about 650 ± 100 yr B.P.

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© 1984 Published by Elsevier B.V. Publisher's version of record: https://doi.org/10.1016/0377-0273(84)90060-X

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Journal of Volcanology and Geothermal Research