Seismic and density signs of mesozoic folding in the earth’s crust of the eastern passive margin of the Siberian craton (profile 3DV)

The results of a complex interpretation of seismic and gravity data along a part (500 km long) of the 3DV profile located in the transition zone from the Siberian Platform to the Verkhoyano-Kolyma fold system are considered. It crosses the Priverkhoyansk advanced trough, the Sette-Daban tectonic zone with access to the folded region [Tectonics…, 2001; Kashubin et al., 2016]. The structure of the crust of the eastern margin of the Siberian craton is interest, which, according to structural and tectonic criteria, belongs to the Mesozoic passive continental margin [Parfenov, 1991; Sokolov, 1991; Tectonics..., 2001] in order to find signs of superimposed folding in the structure of the Earth's crust according to seismic and gravitational data. The depth of the crystalline basement in the Priverkhoyansk trough is also debatable, depending on the nature of the rocks at a depth of 18–23 km at a velocity of 6.2–6.3 km/s, possibly belonging to the Proterozoic.