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Influence of substrate tectonic heritage on the evolution of composite volcanoes: Predicting sites of flank eruption, lateral collapse, and erosion

Tibaldi Alessandro, Corazzato Claudia, Kozhurin Andrey, Lagmay Alfredo F.M., Pasquarè Federico A., Ponomareva Vera V., Rust Derek, Tormey Daniel, Vezzoli Luigina (2008) Influence of substrate tectonic heritage on the evolution of composite volcanoes: Predicting sites of flank eruption, lateral collapse, and erosion // Global and Planetary Change. Vol. 61, No. 3-4. pp. 151-174. doi: 10.1016/j.gloplacha.2007.08.014.

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.gloplacha.2007.08.014

Abstract (translation)

This paper aims to aid understanding of the complicated interplay between construction and destruction of volcanoes, with an emphasis on the role of substrate tectonic heritage in controlling magma conduit geometry, lateral collapse, landslides, and preferential erosion pathways. The influence of basement structure on the development of six composite volcanoes located in different geodynamic/geological environments is described: Stromboli (Italy), in an island arc extensional tectonic setting, Ollagüe (Bolivia–Chile) in a cordilleran extensional setting, Kizimen (Russia) in a transtensional setting, Pinatubo (Philippines) in a transcurrent setting, Planchon (Chile) in a compressional cordilleran setting, and Mt. Etna (Italy) in a complex tectonic boundary setting. Analogue and numerical modelling results are used to enhance understanding of processes exemplified by these volcanic centres. We provide a comprehensive overview of this topic by considering a great deal of relevant, recently published studies and combine these with the presentation of new results, in order to contribute to the discussion on substrate tectonics and its control on volcano evolution. The results show that magma conduits in volcanic rift zones can be geometrically controlled by the regional tectonic stress field. Rift zones produce a lateral magma push that controls the direction of lateral collapse and can also trigger collapse. Once lateral collapse occurs, the resulting debuttressing produces a reorganization of the shallow-level magma migration pathways towards the collapse depression. Subsequent landslides and erosion tend to localize along rift zones. If a zone of weakness underlies a volcano, long-term creep can occur, deforming a large sector of the cone. This deformation can trigger landslides that propagate along the destabilized flank axis. In the absence of a rift zone, normal and transcurrent faults propagating from the substrate through the volcano can induce flank instability in directions respectively perpendicular and oblique to fault strike. This destabilization can evolve to lateral collapse with triggering mechanisms such as seismic activity or magmatic intrusion.
Item Type: Article
Title: Influence of substrate tectonic heritage on the evolution of composite volcanoes: Predicting sites of flank eruption, lateral collapse, and erosion
Language: English
Journal or Publication Title: Global and Planetary Change
ISSN Print: 09218181
Subjects: State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.29 Стратиграфия > 38.29.15 Геохронология по данным абсолютного возраста
State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Kizimen
Volcanoes > 3 Volcanoes of the World > 3.1 Eurasia > Etna (Italy)
Volcanoes > 3 Volcanoes of the World > 3.5 South America > Ollagüe (Bolivia–Chile)
Volcanoes > 3 Volcanoes of the World > 3.2 Southeast Asia > Pinatubo (Philippines)
Volcanoes > 3 Volcanoes of the World > 3.5 South America > Planchon (Chile)
Volcanoes > 3 Volcanoes of the World > 3.1 Eurasia > Stromboli (Italy)
Related URLs:
Depositing User: И.М. Романова
Date Deposited: 18 Jul 2013 06:15
Last Modified: 17 Mar 2014 21:45
URI: http://repo.kscnet.ru/id/eprint/536

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