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Geologic mapping of the Colima volcanic complex (Mexico) and implications for hazard assessment

A. Cortes, V. H. Garduno, J. L. Macias, C. Navarro-Ochoa, J. C. Komorowski, R. Saucedo and J. C. Gavilanes
Geologic mapping of the Colima volcanic complex (Mexico) and implications for hazard assessment (in Stratigraphy and geology of volcanic areas, Gianluca Groppelli (editor) and Lothar Viereck-Goette (editor))
Special Paper - Geological Society of America (April 2010) 464: 249-264

Abstract

During the past 15 yr, volcanological studies in Mexico have been mostly focused on the pyroclastic stratigraphy and petrologic evolution of the volcanoes, with very little attention paid to detailed mapping of volcanic areas. In this study, we present a geologic map of the Colima volcanic complex, which covers approximately 3780 km (super 2) . The Colima volcanic complex is made of El Cantaro, Nevado de Colima, Paleofuego, and Colima volcanoes, totaling 422 km (super 3) in volume. The activity of the Colima volcanic complex started at El Cantaro with the emission of lava flows and domes ca. 1.7 Ma. About 0.53 Ma, 15 km southward, the formation of Nevado began with the emission of lava flows. Nevado produced at least four collapses that generated debris avalanches, debris flows, and pyroclastic-flow deposits. During late Pleistocene (>>38,500 yr B.P.), the formation of Paleofuego began 5 km further south with the emission of lava flows. Paleofuego collapsed at least five times, producing debris avalanches and pyroclastic-flow deposits. The last collapse of Paleofuego, at 2505 yr B.P., produced a 5-km-wide caldera, inside of which grew Colima volcano. Colima is the most active volcano in Mexico, with 45 eruptions during the past 426 yr, representing a potential hazard for the surrounding population of approximately 0.9 million people. From the geological mapping, it is clear that volcanic activity and collapses of the Colima volcanic complex have been controlled by the active Tamazula fault, which generated the NE-SW Alceseca-Atenquique graben.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 464
Title: Geologic mapping of the Colima volcanic complex (Mexico) and implications for hazard assessment
Title: Stratigraphy and geology of volcanic areas
Author(s): Cortes, A.Garduno, V. H.Macias, J. L.Navarro-Ochoa, C.Komorowski, J. C.Saucedo, R.Gavilanes, J. C.
Author(s): Groppelli, Gianlucaeditor
Author(s): Viereck-Goette, Lothareditor
Affiliation: Universidad de Colima, Centro Universitario de Estudios e Investigaciones de Vulcanologia, Colima, Mexico
Affiliation: CNR, Istituto per la Dinamica dei Processi Ambientale, Milan, Italy
Pages: 249-264
Published: 201004
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 92
Accession Number: 2010-064063
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N19°31'00" - N19°31'00", W103°37'60" - W103°37'60"
Secondary Affiliation: Friedrich-Schiller-Universitaet Jena, DEU, Federal Republic of GermanyUniversidad Michoacana de San Nicolas de Hidalgo, MEX, MexicoUniversidad Nacional Autonoma de Mexico, MEX, MexicoInstitute de Physique du Globe de Paris, FRA, FranceUniversidad Autonoma de San Luis Potosi, MEX, Mexico
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201035
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