The structure of the Vladikavkaz Fault Zone based on the study utilizing a complex of geological-geophysical methods |
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Authors: | A V Gorbatikov A N Ovsyuchenko E A Rogozhin M Yu Stepanova N V Larin |
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Institution: | 1.Schmidt Joint Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The Vladikavkaz Fault Zone is a regional boundary between the Alpine folded-block system of the Greater Caucasus and Pre-Caucasus
foredeep (Ossetian Depression). A complex of geological and geomorphological techniques was used for its study. The data of
recent activity of discontinuous and folded dislocations were obtained as a result. Additional application of the microseismic
sounding method allowed us to trace the behavior at depth and along the direction of the Vladikavkaz Fault Zone’s branches
known on the Earth’s surface from geological and geophysical surveys. An idea of the three-dimensional structure of this system
of tectonic faults was made up. It was shown that the structure of the upper section of the fault zone has a form of listric
foldthrust, and in the deep layers of the Earth’s crust it is represented by a well-formed contrast zone with subvertical
plunging. Expressive deformations of young sediments and a clear manifestation of the fault zone at a depth make it possible
to consider the Vladikavkaz Fault as a major seismogenerating structure. |
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