Study of the stress fields neogene to present day of Southwestern Alps : implications for alpine geodynamic and seismic activity
type: Dataset
description: This thesis aims at understanding the significance of seismic activity in a slow orogenic system with the example of the South Western Alps. It presents a geological analysis combining several methods and approaches: (i) a structural analysis of Neogene basins, (ii) a comparison of fault-striae data inversions with focal mechanisms and (iii) an analysis of the spatial and temporal distribution of seismicity in relation with rainfall. The main results are as follows: - The area is subject to a prolonged and globally similar through time north-south shortening context revealed by the analysis of the Miocene and Plio- Quaternary basins. The deformation is mainly accommodated by strike-slip dextral N140 faults. These strike slip faults focus the active deformation along inherited structures. - The geodynamic history of the S Alps is correlated with that of the Mediterranean back-arc basin opening. Extension (at the N-W end of Mercantour massif) and compression (at the foot of the Ligurian margin) occur along a dextral strike-slip system N140°E that might limit the Apulian block rotation. The transition is gradual, the regime evolves from a transtensive to a transpressive regime, from north to south, explained by permutations of stress inferred from fault-strea data analysis. - In this context of slow deformation, seismicity shows an annual periodicity correlated with the frequency and amount of rainfalls. This correlation can be explained by two processes that facilitate the triggering of earthquakes.
identifier: NNT: 2013NICE4086
issued: 2026-05-05T11:07:16.682151
language: fr
modified: 2026-05-05T11:07:16.682156
contact point: Organization
  fn: CCSD
keyword: alpes
keyword: alps
keyword: geodynamic
keyword: geodynamique
keyword: geomorphologie
keyword: geomorphology
keyword: hydrosismicite
keyword: hydrosismicity
keyword: infoeu-reposemanticsdoctoralthesis
keyword: neo-tectonic
keyword: neogene
keyword: neotectonique
keyword: sdustusciences-of-the-universe-physicsearth-sciences
keyword: sismo-tectonic
keyword: sismotectonique
keyword: tectonic
keyword: tectonique
keyword: theses
landing page: https://theses.hal.science/tel-00991806

Study of the stress fields neogene to present day of Southwestern Alps : implications for alpine geodynamic and seismic activity
type: Distribution
format: HTML
issued: 2026-05-05T11:07:16.690948
modified: 2026-05-05T11:07:16.658276
access URL: https://theses.hal.science/tel-00991806

test_moissonnage_selune
type: Agent