The University of Southampton
University of Southampton Institutional Repository

Turbidite record of frequency and source of large volume (>100 km3) Canary Island landslides in the last 1.5 Ma: Implications for landslide triggers and geohazards

Turbidite record of frequency and source of large volume (>100 km3) Canary Island landslides in the last 1.5 Ma: Implications for landslide triggers and geohazards
Turbidite record of frequency and source of large volume (>100 km3) Canary Island landslides in the last 1.5 Ma: Implications for landslide triggers and geohazards
During the last two decades, numerous studies have focused on resolving the landslide histories of the Canary Islands. Issues surrounding the preservation and dating of onshore and proximal submarine landslide deposits precludes accurate determination of event ages. However, submarine landslides often disaggregate and generate sediment gravity flows. Volcaniclastic turbidites sampled from Madeira Abyssal Plain piston cores represent a record of eight large-volume failures from the Western Canary Islands in the last 1.5 Ma. During this time, there is a mean recurrence rate of 200 ka, while the islands of El Hierro and Tenerife have individual landslide recurrences of 500 ka and 330 ka, respectively. Deposits from the 15 ka El Golfo landslide from El Hierro and 165 ka Icod landslide from Tenerife are examined. This study also identifies potential deposits associated with the Orotava (535 ka), Güímar (850 ka), and Rogues de García landslides (1.2 Ma) from Tenerife, El Julan (540 ka), and El Tiñor (1.05 Ma) landslides from El Hierro, and the Cumbre Nueva landslide (485 ka) from La Palma. Seven of eight landslides occurred during major deglaciations or subsequent interglacial periods, which represent 55% of the time. However, all of the studied landslides occur during or at the end of periods of protracted island volcanism, which generally represent 60% of the island histories. Although climate may precondition failures, it is suggested that volcanism presents a more viable preconditioning and trigger mechanism for Canary Island landslides.
1525-2027
2100-2123
Hunt, J.E.
43fd3144-04cd-43d9-b341-b70f2a03bf91
Wynn, R.B.
72ccd765-9240-45f8-9951-4552b497475a
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Masson, D.G.
edd44c8b-38ca-45fb-8d0d-ac8365748a45
Hunt, J.E.
43fd3144-04cd-43d9-b341-b70f2a03bf91
Wynn, R.B.
72ccd765-9240-45f8-9951-4552b497475a
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Masson, D.G.
edd44c8b-38ca-45fb-8d0d-ac8365748a45

Hunt, J.E., Wynn, R.B., Talling, P.J. and Masson, D.G. (2013) Turbidite record of frequency and source of large volume (>100 km3) Canary Island landslides in the last 1.5 Ma: Implications for landslide triggers and geohazards. Geochemistry, Geophysics, Geosystems, 14 (7), 2100-2123. (doi:10.1002/ggge.20139).

Record type: Article

Abstract

During the last two decades, numerous studies have focused on resolving the landslide histories of the Canary Islands. Issues surrounding the preservation and dating of onshore and proximal submarine landslide deposits precludes accurate determination of event ages. However, submarine landslides often disaggregate and generate sediment gravity flows. Volcaniclastic turbidites sampled from Madeira Abyssal Plain piston cores represent a record of eight large-volume failures from the Western Canary Islands in the last 1.5 Ma. During this time, there is a mean recurrence rate of 200 ka, while the islands of El Hierro and Tenerife have individual landslide recurrences of 500 ka and 330 ka, respectively. Deposits from the 15 ka El Golfo landslide from El Hierro and 165 ka Icod landslide from Tenerife are examined. This study also identifies potential deposits associated with the Orotava (535 ka), Güímar (850 ka), and Rogues de García landslides (1.2 Ma) from Tenerife, El Julan (540 ka), and El Tiñor (1.05 Ma) landslides from El Hierro, and the Cumbre Nueva landslide (485 ka) from La Palma. Seven of eight landslides occurred during major deglaciations or subsequent interglacial periods, which represent 55% of the time. However, all of the studied landslides occur during or at the end of periods of protracted island volcanism, which generally represent 60% of the island histories. Although climate may precondition failures, it is suggested that volcanism presents a more viable preconditioning and trigger mechanism for Canary Island landslides.

Text
ggge20139_Hunt_2013_2.pdf - Version of Record
Download (2MB)

More information

Published date: July 2013
Organisations: Ocean and Earth Science, Marine Geoscience

Identifiers

Local EPrints ID: 363023
URI: http://eprints.soton.ac.uk/id/eprint/363023
ISSN: 1525-2027
PURE UUID: 38cf71b6-ddd2-4248-824f-fe6098f8eab2

Catalogue record

Date deposited: 11 Mar 2014 10:57
Last modified: 08 Jan 2022 06:09

Export record

Altmetrics

Contributors

Author: J.E. Hunt
Author: R.B. Wynn
Author: P.J. Talling
Author: D.G. Masson

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.

×