The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Multiple widespread landslides during the long-term evolution of a volcanic island: Insights from high-resolution seismic data, Montserrat, Lesser Antilles

Multiple widespread landslides during the long-term evolution of a volcanic island: Insights from high-resolution seismic data, Montserrat, Lesser Antilles
Multiple widespread landslides during the long-term evolution of a volcanic island: Insights from high-resolution seismic data, Montserrat, Lesser Antilles
New high-resolution multichannel seismic data (GWADASEIS-2009 and JC45/46-2010 cruises; 72 and 60 channels, respectively) combined with previous data (AGUADOMAR-1999 and CARAVAL-2002; 6 and 24 channels, respectively) allow a detailed investigation of mass-wasting processes around the volcanic island of Montserrat in the Lesser Antilles. Seven submarine deposits have sources on the flanks of Montserrat, while three are related to the nearby Kahouanne submarine volcanoes. The most voluminous deposit (?20 km3) within the Bouillante-Montserrat half-graben has not been described previously and is probably related to a flank instability of the Centre Hills Volcano on Montserrat, while other events are related to the younger South Soufrière Hills-Soufrière Hills volcanic complex. All deposits are located to the south or southeast of the island in an area delimited by faults of the Bouillante-Montserrat half-graben. They cover a large part of the southeast quarter of the surrounding seafloor (?520 km2), with a total volume of ?40 km3. Our observations suggest that the Bouillante-Montserrat half-graben exerts a control on the extent and propagation of the most voluminous deposits. We propose an interpretation for mass-wasting processes around Montserrat similar to what has happened for the southern islands of the Lesser Antilles.
1525-2027
Q05006
Lebas, E.
f17bb18d-4425-4ba8-b4f8-72a6d4d76815
Le Friant, A.
8216e8e1-46a9-4f2b-9bb3-5217349e7035
Boudon, G.
ed3e8527-136d-4f85-a6c5-aa5533ecee57
Watt, S.F.L.
76f594eb-9252-4a8b-822f-be71038b18db
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Feuillet, N.
4b83f1f7-8fbe-4d51-80f3-dfc256a8c787
Deplus, C.
53512da2-a465-4e0c-9172-7f209696b7c6
Berndt, C.
231544d4-f681-44a2-ae6e-74385e588bf6
Vardy, M.E.
8dd019dc-e57d-4b49-8f23-0fa6d246e69d
Lebas, E.
f17bb18d-4425-4ba8-b4f8-72a6d4d76815
Le Friant, A.
8216e8e1-46a9-4f2b-9bb3-5217349e7035
Boudon, G.
ed3e8527-136d-4f85-a6c5-aa5533ecee57
Watt, S.F.L.
76f594eb-9252-4a8b-822f-be71038b18db
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Feuillet, N.
4b83f1f7-8fbe-4d51-80f3-dfc256a8c787
Deplus, C.
53512da2-a465-4e0c-9172-7f209696b7c6
Berndt, C.
231544d4-f681-44a2-ae6e-74385e588bf6
Vardy, M.E.
8dd019dc-e57d-4b49-8f23-0fa6d246e69d

Lebas, E., Le Friant, A., Boudon, G., Watt, S.F.L., Talling, P.J., Feuillet, N., Deplus, C., Berndt, C. and Vardy, M.E. (2011) Multiple widespread landslides during the long-term evolution of a volcanic island: Insights from high-resolution seismic data, Montserrat, Lesser Antilles. Geochemistry, Geophysics, Geosystems, 12 (5), Q05006. (doi:10.1029/2010GC003451).

Record type: Article

Abstract

New high-resolution multichannel seismic data (GWADASEIS-2009 and JC45/46-2010 cruises; 72 and 60 channels, respectively) combined with previous data (AGUADOMAR-1999 and CARAVAL-2002; 6 and 24 channels, respectively) allow a detailed investigation of mass-wasting processes around the volcanic island of Montserrat in the Lesser Antilles. Seven submarine deposits have sources on the flanks of Montserrat, while three are related to the nearby Kahouanne submarine volcanoes. The most voluminous deposit (?20 km3) within the Bouillante-Montserrat half-graben has not been described previously and is probably related to a flank instability of the Centre Hills Volcano on Montserrat, while other events are related to the younger South Soufrière Hills-Soufrière Hills volcanic complex. All deposits are located to the south or southeast of the island in an area delimited by faults of the Bouillante-Montserrat half-graben. They cover a large part of the southeast quarter of the surrounding seafloor (?520 km2), with a total volume of ?40 km3. Our observations suggest that the Bouillante-Montserrat half-graben exerts a control on the extent and propagation of the most voluminous deposits. We propose an interpretation for mass-wasting processes around Montserrat similar to what has happened for the southern islands of the Lesser Antilles.

This record has no associated files available for download.

More information

Published date: 2011
Organisations: Marine Geoscience

Identifiers

Local EPrints ID: 189237
URI: http://eprints.soton.ac.uk/id/eprint/189237
ISSN: 1525-2027
PURE UUID: fffe53dc-fc2c-40f7-8783-a8f3663a8f1a

Catalogue record

Date deposited: 31 May 2011 12:55
Last modified: 08 Nov 2021 19:18

Export record

Altmetrics

Contributors

Author: E. Lebas
Author: A. Le Friant
Author: G. Boudon
Author: S.F.L. Watt
Author: P.J. Talling
Author: N. Feuillet
Author: C. Deplus
Author: C. Berndt
Author: M.E. Vardy

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.

×