Geological and geodynamic reconstruction of the East Barents megabasin from analysis of the 4-AR regional seismic profile

Startseva, K.F.; Nikishin, A.M.; Malyshev, N.A.; Valyushcheva, A.A.

Авторы: Startseva K.F., Nikishin A.M., Malyshev N.A., Valyushcheva A.A.
Журнал: Geotectonics
Том: 51
Номер: 4
Год издания: 2017
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 383
Последняя страница: 397
DOI: 10.1134/S0016852117030104
Аннотация: The article considers problems related to the geological structure and geodynamic history of sedimentary basins of the Barents Sea. We analyze new seismic survey data obtained in 2005–2016 to refine the geological structure model for the study area and to render it in more detail. Based on the data of geological surveys in adjacent land (Novaya Zemlya, Franz Josef Land, and Kolguev Island), drilling, and seismic survey, we identified the following geodynamic stages of formation of the East Barents megabasin: Late Devonian rifting, the onset of postrift sinking and formation of the deep basin in Carboniferous–Permian, unique (in terms of extent) and very rapid sedimentation in the Early Triassic, continued thermal sinking with episodes of inversion vertical movements in the Middle Triassic–Early Cretaceous, folded pressure deformations that formed gently sloping anticlines in the Late Cretaceous–Cenozoic, and glacial erosion in the Quaternary. We performed paleoreconstructions for key episodes in evolution of the East Barents megabasin based on the 4-AR regional profile. From the geometric modeling results, we estimated the value of total crustal extension caused by Late Devonian rifting for the existing crustal model.
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Geological and geodynamic reconstruction of the East Barents megabasin from analysis of the 4-AR regional seismic profileстатья

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