The University of Southampton
University of Southampton Institutional Repository

Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat

Trofimovs, J., Foster, C., Sparks, R.S.J., Loughlin, S., Friant, A., Deplus, C., Porritt, L., Christopher, T., Luckett, R., Talling, P.J., Palmer, M.R. and Le Bas, T. (2012) Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat Bulletin of Volcanology, 74, (2), pp. 391-405. (doi:10.1007/s00445-011-0533-5).

Record type: Article

Abstract

The 20th May 2006 lava dome collapse of the Soufrière Hills Volcano, Montserrat, had a total non-dense rock equivalent (non-DRE) collapse volume of approximately 115×106 m3. The majority of this volume was deposited into the ocean. The collapse was rapid, 85% of the mobilized volume being removed in just 35 min, giving peak pyroclastic flow flux of 66×103 m3s?1. Channel and levee facies on the submarine flanks of the volcano and formation of a thick, steep-sided ridge, suggest that the largest and most dense blocks were transported proximally as a high concentration granular flow. Of the submerged volume, 30% was deposited from the base of this granular flow, forming a linear, high-relief ridge that extends 7 km from shore. The remaining 70% of the submerged volume comprises the finer grain sizes, which were transported at least 40 km by turbidity currents on gradients of <2°. At several localities, the May 2006 distal turbidity currents ran up 200 m of topography and eroded up to 20 cm of underlying substrate. Multiple turbidites are preserved, representing current reflection from the graben margins and deflection around topography. The high energy of the May 2006 collapse resulted in longer submarine run out than the larger (210×106 m3) Soufrière Hills dome collapse in July 2003.

Full text not available from this repository.

More information

Published date: 2012
Organisations: Geochemistry, Marine Geoscience

Identifiers

Local EPrints ID: 300262
URI: http://eprints.soton.ac.uk/id/eprint/300262
ISSN: 0258-8900
PURE UUID: 1e3cb63f-c273-4c4a-b726-6470d72e7680

Catalogue record

Date deposited: 20 Feb 2012 13:27
Last modified: 18 Jul 2017 06:14

Export record

Altmetrics

Contributors

Author: J. Trofimovs
Author: C. Foster
Author: R.S.J. Sparks
Author: S. Loughlin
Author: A. Friant
Author: C. Deplus
Author: L. Porritt
Author: T. Christopher
Author: R. Luckett
Author: P.J. Talling
Author: M.R. Palmer
Author: T. Le Bas

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×