Home – Home – Jornals – Russian Geology and Geophysics 2002 number 12

A digital elevation model (DEM) is applied to morpho-tectonic analysis of the northern mountain surroundings of Lake Telestkoye. The investigation into the neo-tectonic structure of the region and vertical offset of block movements implies detection of peneplain remnants, digital elevation modelling, and interpretation of aerial and satellite imagery. Lineaments expressed in the surface topography and/or distinguished on aerial and satellite images were divided into three groups. Those of the first two groups are different kinds of normal faults, and the third-group lineaments without geomorphically expressed vertical component have been interpreted as eroded structures of the pre-Cenozoic basement. Structures of the three types often belong to single lineament, which may indicate reactivated and stable neotectonic segments of the old basement faults. The revealed neo-tectonic blocks are rarely larger than a few kilometers across. Most of normal faults occur on the sides of the Teletsk and the adjacent Kamga and Koldor grabens, where vertical offset of recent block movements reach their maximum of 400-1200 m; in other grabens, the offset is mostly under 100-300 m. The surface topography of the region is strongly controlled by tectonics, evident from long V-shaped river valleys along zones of weakness. Some valleys are up to 600-800 m deep, and the total topographic gradient is 1600 m. In addition to tectonic factors, intense erosion is caused by recent lowering of the Lake Teletskoye level which is the regional base level of erosion.