Complex landslide behaviour and structural controlled by the structures: A 3D conceptual model example of Åknes rockslide, Norway

Détails

ID Serval
serval:BIB_0EEF064D6588
Type
Partie de livre
Collection
Publications
Institution
Titre
Complex landslide behaviour and structural controlled by the structures: A 3D conceptual model example of Åknes rockslide, Norway
Titre du livre
Slope tectonics
Auteur(s)
Jaboyedoff M., Oppikofer T., Derron M.-H., Böhme M., Blikra L.-H., Saintot A.
Editeur
Geological Society
ISBN
1862393249
Statut éditorial
Publié
Date de publication
2011
Editeur scientifique
Jaboyedoff M.
Volume
351
Pages
147-162
Edition
Special Publication
Langue
anglais
Notes
Jaboyedoff2011c
Résumé
Åknes is an active complex large rockslide of approximately 30?40
Mm3 located within the Proterozoic gneisses of western Norway. The
observed surface displacements indicate that this rockslide is divided
into several blocks moving in different directions at velocities
of between 3 and 10 cm year?1. Because of regional safety issues
and economic interests this rockslide has been extensively monitored
since 2004.
The understanding of the deformation mechanism is crucial for the
implementation of a viable monitoring system. Detailed field investigations
and the analysis of a digital elevation model (DEM) indicate that
the movements and the block geometry are controlled by the main schistosity
(S1) in gneisses, folds, joints and regional faults. Such complex
slope deformations use pre-existing structures, but also result in
new failure surfaces and deformation zones, like preferential rupture
in fold-hinge zones.
Our interpretation provides a consistent conceptual three-dimensional
(3D) model for the movements measured by various methods that is
crucial for numerical stability modelling. In addition, this reinterpretation
of the morphology confirms that in the past several rockslides occurred
from the Åknes slope. They may be related to scars propagating along
the vertical foliation in folds hinges. Finally, a model of the evolution
of the Åknes slope is presented.
Création de la notice
25/11/2013 17:26
Dernière modification de la notice
20/08/2019 13:35
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