We analysed the Piz Dora deep-seated gravitational slope deformation by integrating field surveys, 3D structural analysis and numerical modelling. The DSGSD affects meta-sandstones, meta-conglomerates and phyllites of the Austroalpine S-Charl cover nappe, involved in a slopescale, WNW trending closed anticline fold. The area is seismically active and experienced extensive glaciation during the LGM. The slope is affected by spectacular gravitational morphostructures (double-crested ridges, scarps and counterscarps) associated to the deep-seated sliding of 1.85 km3 of rock along a basal shear zone up to 300 m deep. The DSGSD deformed recent periglacial features and partially collapsed. Finite-Element modelling suggests that earthquake shaking and related damage may have enhanced the triggering role of postglacial debuttressing, suggesting the importance of active tectonic conditioning in relevant alpine sectors. .
Barbarano, M., Agliardi, F., Crosta, G., Zanchi, A. (2015). Inherited and active tectonic controls on the Piz Dora DSGSD (Val Müstair, Switzerland). In G. Lollino, D. Giordan, G.B. Crosta, J. Corominas, R. Azzam, J. Wasowski, et al. (a cura di), Engineering Geology for Society and Territory - Volume 2: Landslide Processes (pp. 605-608). Springer International Publishing [10.1007/978-3-319-09057-3_100].
Inherited and active tectonic controls on the Piz Dora DSGSD (Val Müstair, Switzerland)
AGLIARDI, FEDERICO
Primo
;CROSTA, GIOVANNISecondo
;ZANCHI, ANDREA MARCOUltimo
2015
Abstract
We analysed the Piz Dora deep-seated gravitational slope deformation by integrating field surveys, 3D structural analysis and numerical modelling. The DSGSD affects meta-sandstones, meta-conglomerates and phyllites of the Austroalpine S-Charl cover nappe, involved in a slopescale, WNW trending closed anticline fold. The area is seismically active and experienced extensive glaciation during the LGM. The slope is affected by spectacular gravitational morphostructures (double-crested ridges, scarps and counterscarps) associated to the deep-seated sliding of 1.85 km3 of rock along a basal shear zone up to 300 m deep. The DSGSD deformed recent periglacial features and partially collapsed. Finite-Element modelling suggests that earthquake shaking and related damage may have enhanced the triggering role of postglacial debuttressing, suggesting the importance of active tectonic conditioning in relevant alpine sectors. .
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
