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VOLCANIC COLLAPSE SESSION EGU 2010
From: Benjamin van Wyk de Vries <B.vanwyk@xxxxxxxxxxxxxxxxxxxxxxx>
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Call For Abstracts
European Geosciences Union: General Assembly 2010 (02-07 May)
Symposium: Natural Hazards
Session NH2.4: The initiation, development and deposits of Volcanic Collapses, are they different?
Conveners: B. van Wyk de Vries (1), D.N Petley (2) M. Hürlimann (3) A. and M. Belousov (4)
(1) Magma and Volcanoes Laboratory, Clermont-Ferrand, France; Email: b.vanwyk@xxxxxxxxxxxxxxxxxxxxxxx
(2) International Landslide Centre, Department of Geography, Durham University, Durham, DH1 3LE, UK email: d.n.petley@xxxxxxxxxxxx
(3) Department of Geotechnical Engineering and Geosciences, Technical University of Catalonia (UPC) Jordi Girona 1-3 (D2) 08034 Barcelona SPAIN email: marcel.hurlimann@xxxxxxx
(4) Earth observatory of Singapore. Nanyang Technological University 50 Nanyang Avenue, Block N2-01a-15, Singapore 639798 email:belousovsasha@xxxxxxxxx
Description:
Sector collapse is common at all types of volcano and in mountainous areas and is a major hazard. The origin and trigger of collapse is a growing field of study and more field data and physical models are becoming available. Collapse generally generates a rockslide-debris avalanche, which is also the subject of intense field study and modelling. Such events are important as they are highly destructive. In general, volcanic debris avalanches have been considered as being more mobile, and generally different from other non-volcanic ones. However, as engineers studying non-volcanic cases and volcanologists have different prejudices and ways of study, much confusion has occurred. We aim to get to this session landslide specialists of all types to compare and contrast different volcanic and non-volcanic scenarios, and to explore the variability within each set, and the relationships between them.
In this session we wish to integrate discussion on studies starting before collapse initiation, through collapse, and subsequent events related to the collapse deposit, such as dam breakout, or debris flow generation. We would like to have studies concentrating on debris avalanche details as well as the far-field effects. A broad mix of research from field studies and laboratory studies, to numerical and analogue modelling of collapse and associated effects is welcomed.
The session will follow the following areas of research:
1) The evidence: field and laboratory description of volcanoes and mountains, deposits and their significant failure mechanics and transport processes.
2) Structural interactions leading to slope failure.
3) The role of tectonic, magmatic and hydrothermal systems in developing failure, and long term slope deformation, volcano and mountain spreading.
4) Mechanisms in the transformation from unstable slope to rockslide-avalanche.
5) Mechanisms in the transformation from rockslide-avalanche to debris flow.
6) Numerical and analogue modelling of initiation, transport and transformation.
We propose to have a large poster session that will allow room for a broad discussion, so posters are particularly welcome, and we shall have invited posters.
ABSTRACT DEADLINE: Jabuary 18th 2010.
Further conference details: http://meetings.copernicus.org/egu2010/home.html
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