The Active Tectonics of the Vuoksi Fault Zone in the Karelian Isthmus
Bulletin of the Geological Society of Finland, Vol. 90, 2018, pp 257–273, https://doi.org/10.17741/bgsf/90.2.009 The active tectonics of the Vuoksi Fault Zone in the Karelian Isthmus: parameters of paleo- earthquakes estimated from bedrock and soft- sediment deformation features Sergey V. Shvarev1,2*, Andrey A. Nikonov2, Michail V. Rodkin3,4 and Anton V. Poleshchuk5 1 Institute of Geography, Russian Academy of Sciences, Staromonetny lane 29, Moscow, 119017, Russia 2 Schmidt Institute of the Physics of the Earth, Russian Academy of Sciences, Bolshaya Gruzinskaya str., 10-1, Moscow, 123242, Russia 3 Institute of Theory of Earthquake Prediction and Mathematical Geophysics, Profsoyuznaya str. 84/32, Moscow, 117997, Russia 4Institute of Marine Geology and Geophysics Far Eastern Branch, Russian Academy of Science, Nauki street., 1B, Yuzhno-Sakhalinsk, 693022, Russia 5 Geological Institute, Russian Academy of Sciences, Pyzhevsky lane 7, Moscow, 119017, Russia Abstract The area under study is located in the south-eastern periphery of the Fennoscandian crystalline shield. At present this is a tectonically quiet region without large seismic events. But it is well known that in post-glacial time the Fennoscandian shield was an arena of active postglacial tectonics and large earthquakes. The evidence for such events was found in various parts of Fennoscandia. The traces left by some paleo- earthquakes show an undisputed character of large post-glacial faults some tens of kilometres long and of a few meters in displacement. However, some other features left by earthquakes are under discussion. Numerous deformations in bedrock and in soft sediments which can be considered as being due to earthquakes were found in the Russian Karelia.
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