Deformation structures in glaciolacustrine deposits of the Khibiny and assessment of its seismogenic potential
1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
2 Moscow State University of Geodesy and Cartography, Moscow, Russia
2 Moscow State University of Geodesy and Cartography, Moscow, Russia
Journal: Problems of Engineering Seismology
Tome: 43
Number: 3
Year: 2016
Pages: 5-17
UDK: 550.34 + 550.248.2 + 551.89
DOI: 10.21455/VIS2016.3-1
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Gorbatov E., Kolesnikov S. Deformation structures in glaciolacustrine deposits of the Khibiny and assessment of its seismogenic potential // . 2016. Т. 43. № 3. С. 5-17. DOI: 10.21455/VIS2016.3-1
@article{GorbatovDeformation2016,
author = "Gorbatov, E. and Kolesnikov, S.",
title = "Deformation structures in glaciolacustrine deposits of the Khibiny and assessment of its seismogenic potential",
journal = "Problems of Engineering Seismology",
year = 2016,
volume = "43",
number = "3",
pages = "5-17",
doi = " 10.21455/VIS2016.3-1",
language = "English"
}
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Keywords: paleoseismology, convolute bedding, soft-sediment deformations, seismic liquefaction, mudflow, glaciolacustrine deposits, Khibiny, Kola Peninsula
Аnnotation: Horizons of soft-sediment deformation extending laterally for several hundred meters in glaciolacustrine deposits of the Khibiny Massif (central part of the Kola Peninsula) are studied. These structures have been previously described as effects of strong earthquakes in the Late Pleistocene. Soft-sediment deformations are covered unstructured horizon consisting of coarse grains dispersed in sand-silt matrix. This fact allows us to explain the origin of deformation structure by the influence underwater mudflow on the consolidated bottom sediments. It is also found absence of specific to seismites signs of liquefaction and fluidization, despite the intense and instantaneous folding of sediments. Thus, the new data on the genesis of folded horizons glaciolacustrine sediments in the Khibiny does not support the high seismic potential of this region.