LATE QUATERNARY GEODYNAMICS AND TECTONIC ACTIVITY WITHIN THE KAN FAULT SYSTEMj(southwestern Siberian Platform)
S.G. Arzhannikov, A.S. Gladkov, and R.M. Semenov
Institute of the Earth's Crust, Siberian Branch of the RAS, 128 ul. Lermontova, Irkutsk, 664033, Russia
Keywords: Faults, prehistoric earthquakes, earthquake rupture, thrusts, reverse faults, fractures
Pages: 399-410
Abstract
Late Quaternary tectonic activity in the southwestern Siberian Platform was investigated in the Kan fault system. Geodynamic analysis indicates an inherited style of faulting, mostly of oblique geometry, at the junction of the East Sayan Ridge and the Rybnaya basin. Motions on NW faults dramatically restructured the surface topography and produced horst anticlines and horsts. Aerial and satellite imagery of the Kiyai-Arbai fault zone in the Kan system detects traces of earthquake rupture along 100 km of the fault from the Anzha to the upper Kungus River. A 9 km long segment of the fault scarp was excavated near Malinovka Village between 55.09
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