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The structure of composite volcanoes unravelled by analogue modelling: A review

Mathieu Lucie. (2018). The structure of composite volcanoes unravelled by analogue modelling: A review. Journal of Structural Geology, 114, p. 320-328.

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URL officielle: https://doi.org/10.1016/j.jsg.2018.01.009

Résumé

Volcanic edifices are unstable accumulations of eruptive and intrusive products with complex internal structures. A documentation of these structures facilitates the assessing of the various hazards associated with volcanoes, e.g. flanks instabilities and eruptive events. However, structures are not easily assessed in the field, as volcanoes are regularly covered by eruptive products and are rapidly eroded. In the case of recent and active volcanoes, internal structures are generally extrapolated from the external morphology of the edifice, which can be documented using Digital Elevation Models (DEM) and geodetic data. Interpretation of such data greatly benefits from analogue models, which are idealised representations of reality used to test the impact that various processes may have on the shape of a volcanic edifice. This short review focuses on the contribution of analogue models to our comprehension of the internal structure of composite volcanic cones. The other volcanic morphologies (e.g. caldera) are excluded from this review, as they have distinct structure and evolution that have already been thoroughly reviewed. The reviewed models were used to investigate the impact that regional faults, magma injections and ductile substratum, among other processes, have on the internal structure and surface morphology of many volcanic edifices. These models were also used to locate unstable flanks and eruption sites.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:114
Pages:p. 320-328
Version évaluée par les pairs:Oui
Date:Septembre 2018
Sujets:Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Unité d'enseignement en sciences de la Terre
Mots-clés:analogue models, volcano, regional faults, magma intrusions, surface deformation, spreading, modèles analogiques, volcan, défauts régionaux, intrusions de Magma, déformation de surface, propagation
Déposé le:11 sept. 2018 00:43
Dernière modification:01 sept. 2020 04:10
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