Suchergebnisse

New sesmostratigraphic model has been established for the sedimentary cover of the North-Chukchi basin. Based on the model interpretation of the main paleogeographic events within the territory was performed. We identify three stage in the post-rift sedimentary history of the North-Chukchi basin: Late Cretacerous to Paleocene stage when strong progradation of shelf sedimentary packages was occurred, Mid Eocene — Miocene, with gradual infilling of the basin from different sides and Late Miocene to Present stage with present shapes of the shelf and slow clinoform complex aggradation.

This paper presents an analysis of the structure and geological history of the shelf of the East Siberian continental margin, based on the interpretation of seismic data in conjunction with geological information. The article describes the main structural elements of the East Siberian Sea which formed as a result of rifting processes (barremian–aptian) — the Novosibirsky, the Mansky, North Melvillsky and Dremheadsky rifts in the northern part of the East Siberian basin, and the Mellvillsky rift in the southern part. Rifts are considered together with volcanic zones and the main relative elevations — De-Long, Wrangel, Kotelnichesky and Baranovsky elevations. It is assumed that the process of rifting thinned out the crust of the Podvodnikov basin. The sedimentary basin was formed by rifting.