Delvaux, D.,  Fronhoffs, A.,  Hus, R. & Poort, J. 1999. ‘Normal fault splays, relay ramps and transfer zones in the central part of the Baikal Rift basin: insight from digital topography and bathymetry’. Bull. Centres Rech. Explor.-Prod. Elf Aquitaine 22(2): 341-358. Boussens : Elf aquitaine production.  (PR).

Article in a scientific Journal / Article in a Journal

A Digital Elevation Model (DEM) of the Baikal rift basin and adjacent rift shoulders has been made from 1/200.000 digitised topographic and bathymetric maps. It is used as a means for visualisation of the detailed topography and bathymetry, in morphotectonic investigation of rift basin formation in the Baikal Rift Zone. The morphology of both aerial and underwater structures is best expressed by a combination of coloured maps, according to the relative altitude and shaded relief maps with artificial illumination. The DEM is used for a detailed morphostructural and tectonic analysis of the central part of the Baikal rift basin. Relay ramps and normal fault splays of different scales are clearly shown. They illustrate rift segment interaction during rifting propagation. In addition, the structure of the large scale Olkhon - Academician Ridge, a partly underwater transfer zone between the Central and North Baikal basins, is highlighted. The digital morphology helps to visualize these structures in three dimensions and to define precisely the linking mode between fault segments and rift basins.

• Tectonique active et risques naturels des rifts continentaux