UMR 6538
PROGRAMME DE RECHERCHE EN SIBERIE

Branche Sibérienne de l'Académie des Sciences de Russie
CONFERENCE
à l'Institut de Géophysique, Novosibirsk, Russie
Jacques Déverchère

30 juin 2005

 

A l'occasion de la remise de la distinction de Docteur Honoris Causa de l'Académie des Sciences de Russie, Branche Sibérienne, j'ai présenté une conférence d'une heure qui résume les grands axes des travaux que j'ai eu le plaisir de mener depuis 1989 avec les partenaires russes et français sur le rift Baïkal et les zones environnantes. Je reproduis ci-dessous le résumé (en anglais) de cette conférence et fournis les fichiers PDF des différentes parties de l'exposé.

 

A 15 years French-Russian cooperation in Earth Sciences : A rich and integrative experience for the understanding of ongoing continental deformation

Abstract. This lecture is aimed at evidencing the strong and fruitful links that have developed between French and Russian teams in the course of their cooperation that was starting in 1989. Since that time, complementary studies in the areas of the Baikal rift system and deforming Mongolia have been jointly performed and have allowed efficient training of many students, stimulating discussions and exchanges of experience and knowledge between scientists, and numerous common publications in international and national journals. After an initial stage of comparing and linking fault tectonics and seismicity patterns, GPS geodesy has been performed and enhanced the development of a quantitative model of rift opening. Further efforts have led to ensure a stronger connection between field structural geology, satellite remote-sensing analyses, and paleoseismology. Surface deformation has been then modelled and combined to other sources of informations at depth (gravity, tomography, depth distribution of earthquakes, broadband seismic studies) to propose possible geodynamic evolutions, trying to integrate as much data as possible. Although controversies and discrepancies still exist, this long-term cooperation has brought deep changes in the way our teams determine scientific objectives and how they may forecast the evolution of the lithosphere. Especially, few examples are provided concerning the consequences of the studies made on the way we think seismic hazard can be better assessed in such slowly-deforming intracontinental regions.

Fichiers PDF de la conférence (en anglais):

1. Context: Asia Cenozoic deformation

2. Baikal: Fault geometry & kinematics, finite deformation

3. Baikal-Mongolia: Rheology & strain from seismology, GPS geodesy & gravity

4. Approaching the seismic cycle in Northern Asia - Conclusions - References