Title

L. A. Daragan-Sushchova, N. N. Sobolev, E. O. Petrov, L. R. Grinko, N. A. Petrovskaya, Yu. I. Daragan-Sushchov

To substantiation of stratigraphy binding of the key seismic horizons on the East-Arctic Shelf and in the area of Central Arctic uplifts

The progress in geological and geophysical knowledge of Central Arctic uplifts area and East-Arctic Shelf has detected the basic problems in stratification of sedimentary cover. The stratigraphic binding of key seismic horizons within the deep-water part of the Arctic Ocean is still quite unclear due to the absence of geological bench marks. Basic approach for stratification of Arctic Ocean sedimentary cover is based on the wave field’s characteristics and tracing of regional seismic horizons. Their age identification still depends on general geological ideas. Different correlative models of seismic-stratigraphic units and their timing are given in this article for various Arctic regions. For examples are selected: near pole part of Lomonosov Ridge and zone of its connection with Amundsen and Makarov basins, profile CDP A7, located in the connection zone of Lomonosov Ridge and Russian Shelf, North-Chukchi trough. Authors give a variant of correlation and age binding of reflecting horizons on the North-Chukchi trough, where in the lower part of section identified an Ellesmerian complex. The conclusion, that specific regional study in closed and hardly-reached Arctic regions shall be based on accurate continuous tracing of reflecting horizons and seismic-stratigraphic units and its dynamical and kinematic characteristics over the lateral and section is made. Geological point of view must only limit the geophysical models.
Key words: Arctic Ocean, seismic reflection method common midpoint (CDP), age of seismic-stratigraphic units.