Figure 1. Map of neotectonics of the Eurasian basin and the adjacent margins [{\it Grachev and Karasik,} 1974 with changes]. 1 - rift valley of the Gakkel Ridge; 2 - transform faults on oceanic crust; \mbox{3 - transform faults separating areas of a single magnetic province;} 4 - zones of transform faults; \mbox{5 - faults on the continental crust;} 6 - boundaries of the Gakkel Ridge; 7 - isolines of the neotectonic vertical movements; 8a - isopachs of sedimentary cover for the oceanic basins; 8b - isopachs of sedimentary cover for the Laptev Sea shelf; 9 - local neotectonic uplifts; 10 - local neotectonic subsidence; 11 - isochrones of oceanic crust (m.y.); 12 - earthquakes epicenters; 13 - stress pattern in earthquake foci; 14 - area of tension of the Earth's crust; 15a - concordant submarine volcanoes; 15b - discordant submarine volcanoes; 16 - the buried spreading zone of the Gakkel Ridge beneath the sedimentary cover of the Laptev Sea continental margin; 17 - foredeep compensated by deposition of sediments; 18 - transition zone between continental and oceanic crust; 19 - displaced and submerged parts of the former Barents-Kara sea shelf (Lomonosov Ridge).