Volcanic edifice slip events recorded on the fault plane of the San Andres Landslide, El Hierro, Canary Islands
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F20%3A00532845" target="_blank" >RIV/67985891:_____/20:00532845 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0040195119304329?token=EB9FC3E42D12336F3D353B5BFD480A4E1C3B6E69E7CE5BAB0E5C5D475C037B5DD598D5ED76DF16198117E117519B765C" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0040195119304329?token=EB9FC3E42D12336F3D353B5BFD480A4E1C3B6E69E7CE5BAB0E5C5D475C037B5DD598D5ED76DF16198117E117519B765C</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tecto.2019.228317" target="_blank" >10.1016/j.tecto.2019.228317</a>
Alternative languages
Result language
angličtina
Original language name
Volcanic edifice slip events recorded on the fault plane of the San Andres Landslide, El Hierro, Canary Islands
Original language description
Volcanic flank collapses often result in giant debris avalanches that are capable of travelling tens of kilometres across the ocean floor and generating tsunamis that devastate distant communities. The San Andres Landslide on El Hierro, Canary Islands, represents one of the few places in the world where it is possible to investigate the landslide mass and fault planes of a volcanic collapse structure. In this study, a new conceptual model for the development of this enormous slump is presented on the basis of structural geological and geomorphological measurements, petrological and microstructural analyses, and cosmogenic radionuclide dating. Structural geological and geomorphological measurements indicate that the fault plane records two distinct events. Petrological and microstructural analyses demonstrate that a thin layer of frictionite covers the surface of the fault in contact with an oxidised tectonic breccia that transitions into the underlying undeformed basanite host rock. This frictionite comprises a heterogeneous cataclastic layer and a translucent silica layer that are interpreted to represent two separate slip events on the basis of their architecture and crosscutting relationships. Cosmogenic He-3 dating reveals a maximum exposure age of 183 +/- 17 ka to 52 +/- 17 ka. Arguments are presented in support of the idea that the first slip event took place between 545 ka and 430 ka, prior to significant clockwise rotation of El Hierro, and the second slip event took place between 183 ka and 52 ka, perhaps in association with one of the giant debris avalanches that occurred around that time. This is the first time that more than one slip event has been recognised from the fault plane of the San Andres Landslide. It is also believed to be the first time a silica layer resulting from frictional melt has been described in a volcanic setting.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GJ16-12227Y" target="_blank" >GJ16-12227Y: El Hierro megalandslide dynamics analysed using “big data” to predict the future behaviour of megalandslides on other volcanic islands</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Tectonophysics
ISSN
0040-1951
e-ISSN
—
Volume of the periodical
776
Issue of the periodical within the volume
FEB 5
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
14
Pages from-to
228317
UT code for WoS article
000518493400004
EID of the result in the Scopus database
2-s2.0-85077649423