Recent structures and tectonic regimes of the stress–strain state of the Earth’s crust in the northeastern sector of the Russian Arctic region

Dynamics of the Zones of Strong Earthquake Epicenters in the Arctic–Asian Seismic Belt

“…Seismotectonic studies are based on the concept of the structural and dynamic uniformity of the geophysical medium and regularities in the development of seismogeodynamic processes, which is elaborated by the Institute of Physics of the Earth of the Russian Academy of Sciences (IPE RAS) [4,5] and developed in [1][2][3]6,7]. The research method used in our studies of the Russian Arctic includes several stages.…”

“…Modern (Late Cenozoic) structures in the study area are analyzed considering the recent tectonics as a structural framework comprising active faults and other features of modern tectonic activity related to regional seismicity. Neotectonic structures of the Russian Arctic are ranked by their degree of activity, according to the regional principles of the classification described in [6,7].…”

“…The basement top is disturbed only by normal faulting, which gives evidence of the post-folding age of this surface and suggests that the sedimentary cover may be dated to the Cenozoic or Late Cretaceous. [7]). 1-Gakkel spreading ridge; 2-continental slope; 3-grabens at the bottom of the Laptev Sea: L-Lyakhov, B-Belkovsky-SvyatoyNos, S-Shirostonsky, Ch-Chondonsky, Y-Ust-Yana, U-Ust-Lena; 4-conventional boundaries of the Laptev Sea plate: S-southern, W-western, E-eastern; 5-boundaries of large troughs and uplifts; 6-earthquake epicenters sized by magnitude: ≤3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0; 7-focal mechanisms, dates and magnitudes of earthquakes (lower hemisphere; the principal stress axes of compression and extension are marked by black and white dots, respectively).…”

Geodynamic Activity of Modern Structures and Tectonic Stress Fields in Northeast Asia

“…Выполненные структурно-динамические иссле-дования указывают на существование в Хараулах-ском сегменте областей с разным типом напря-женного состояния земной коры [Imaev et al, 2000;Imaeva et al, 2016c]. Это подтверждается данными Т а б л и ц а 1.…”

“…Она включает новые исследования, а также краткие сейсмотектонические характеристики Арктическо-го сектора из ранее опубликованных работ [Imaeva et al, 2015a[Imaeva et al, , 2016a[Imaeva et al, , 2016b[Imaeva et al, , 2016cSeredkina, Kozmin, 2017]. Описание сегментов в данной последова-тельности необходимо для полной характеристики напряженно-деформированного состояния земной коры вдоль структурного ограничения Колымо-Чукотской коровой плиты.…”