Page 258 - Caldera Volcanism Analysis, Modelling and Response

CHA P T E R 6

A Review on Collapse Caldera Modelling

1, 1 2 3
J. Martı ´ , A. Geyer , A. Folch and J. Gottsmann

Contents

1. Introduction 234
2. The Role of Experimental Models in Caldera Studies 235
2.1. Mining subsidence: an analogue for caldera collapse 238
2.2. Main observations 238
2.3. Restrictions of the experimental modelling 241
3. Theoretical Models on Collapse Calderas Formation 244
3.1. Magma chamber models 245
3.2. Host rock models 252
3.3. Restrictions and limitations of theoretical models 258
4. Geophysical Imaging and Its Value for Caldera Studies 259
4.1. Results from geophysical imaging of caldera structures 265
4.2. Limitations of geophysical imaging 271
5. Discussion and Implications 273
5.1. On the use of experimental models 273
5.2. On the use of theoretical models 275
5.3. Implications of geophysical images on the assessment of
caldera processes 276
6. Conclusions 277
Acknowledgements 278
References 278

Abstract
A complete study of collapse caldera formation should ideally involve multiple aspects
such as regional tectonics, system geometry, magma and host rock properties, fluid-
structure interaction, pre-existing structural discontinuities, and deformation history. Due
to the complexity of such a comprehensive analysis, studies so far have centred on

Corresponding author. Tel.: +34934095410; Fax: +34934110012
E-mail address: joan.marti@ija.csic.es
1
Institute of Earth Sciences ‘Jaume Almera’, CSIC, c/Lluis Sole Sabaris s/n, 08028 Barcelona, Spain
2
Osservatorio Vesuviano (OV-INGV), Napoli, Italy
3
Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, UK
Developments in Volcanology, Volume 10 r 2008 Elsevier B.V.
ISSN 1871-644X, DOI 10.1016/S1871-644X(07)00006-X All rights reserved.
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