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Last name: LEBOURG
First name: T.
Bull. of Engineering Geology and Environnment, v. 62, p. 221-229 [767], 2003
Journal of Applied Geophysics, v. 62, n. 1, p. 47-57, 2007. http://dx.doi.org/10.1016/j.jappgeo.2006.07.003
Plusieurs sites d'étude (Pyrénées) soumis à des glissements de terrain sont présentés avec leurs caractéristiques géologiques et géomorphologiques permettant de les classer suivant leur typologie. Pour l'ensemble des glissements de terrain, on analyse la géométrie des glissements ainsi que les facteurs géologiques et mécaniques favorisant les...
Engineering Geology, v. 73, n. 1-2, p. 37-50, 2004. http://dx.doi.org/10.1016/j.enggeo.2003.11.004
The northern coast of the Peloponnesus (Greece) is characterized by high seismic activity related to the Gulf of Corinth opening with an extension rate of 16 mm y− 1. Studies presented in this paper focus on the characterization of links between tectonic and slope deformations on the Panagopoula slope, located on the southern coast. The...
This paper deals with the applicability of electrical resistivity tomography (ERT) for the recognition of large landslide structures at depths, which have never previously been imaged accurately. One of the most studied and instrumented deep landslides in Europe is taken as an example: the La Clapière landslide. The first stage of the study...
International audience
Mathematical Geology, v. 35, n. 7, p. 835-852, 2003. http://dx.doi.org/10.1023/B:MATG.0000007782.78685.a3
Although it is generally assumed that the internal structure of a slope (e.g. lithology and rock mass properties, inherited faults and heterogeneities, etc.) is preponderant for the progressive development of large-scale landslides, the ability to identify triggering factors responsible for final slope failures such as glacial debuttressing,...
International audience
The large-scale deformation of high mountain slopes finds its origin in many phenomena with very different time-constants. Gravitational effect, tectonic forces, and water infiltration are generally the principal causes. However, it is always very difficult to distinguish which cause is dominant and which are their respective effects. A...
Canadian Geotechnical Journal, v. 40, n. 2, p. 419-434, 2003
A very large deep-seated landslide (DSL) in the northern Pyrenees with over ∼ 1.4 × 109 m3 was mapped and dated based on sedimentation rates and 10Be terrestrial cosmogenic radionuclide surface exposure (CRE) dating. Our analysis on the landslide reveals the role of inherited structures in the landslide process, and highlighted typical...
International audience
Journal of Structural Geology, v. 24, n. 11, p. 1741-1752, 2002. http://dx.doi.org/10.1016/S0191-8141(01)00129-8
After a few years of research, the observation and the analysis of the deep-seated landslides suggest that these are mainly controlled by tectonic structures, which play a dominant role in the deformation of massif slopes. The La Clapière deep-seated landslide (Argentera Mercantour massif) is embedded in a deep-seated gravitational slope...
Clayey landslides acting like debris-flows when experiencing fluidization represent serious threats for populations and infrastructures and have been the subject of numerous works in the past decade. Recent studies have shown that the shear-wave velocity Vs (linked to the stiffness of the material), could potentially be used as a precursory...
A temporal imagery of water circulation in a landslide by Electrical Resistivity Tomography (ERT) was conducted to identify spatially and temporally the coupling between rainfalls, consecutive water inflows in a sliding mass, and induced resistivity variations. This work is based on a multi-scale experimental approach applied on the "Vence"...
The lower Var valley is the only large outcropping zone of Plio-Quaternary terrains throughout the southwestern Alps. In order to assess the seismic hazard for the Alps - Ligurian basin junction, we investigated this area to provide a record of earthquakes that have recently occurred near the city of Nice. Although no historical seismicity has...
The southern part of the French Alps is studied for years in mapping and understanding of large-scale gravitational deformations. The identification and the knowledge of large-scale slope deformation (deep-seated gravitational slope deformation or DSGSD and deep-seated landslide or DSL) in the previous work of Jomard (2006) and Zerathe (2013)...
We present the results of an electric resistivity tomography (ERT) survey, combined with mappings of diffuse carbon dioxide flux, ground temperature and self-potential (SP) at Solfatara, the most active crater of Phlegrean Fields. Solfatara is characterized by an intense carbon dioxide degassing, fumarole activity, and ground deformation. This...