L. A. DARAGAN­-SUSHCHOVA, V. N. ZINCHENKO (VSEGEI), YU. I. DARAGAN-­SUSHCHOV (VNIIOkeangeologia), I. N. SAVEL’EV (VSEGEI)

The time of the main submersion to the oceanic depths and the scale of different age rifting in the Arctic Basin based on the results of seismic data interpretation

The article answers two topical questions: the time of the main submergence to the ocean depths, the age and extent of rifting. It is shown that the Arctic Ocean was formed simultaneously across the entire Arctic Basin, regardless of the sign of Recent structures. The submergence began in the Oligocene and increased sharply from the Middle Miocene. Different stages of basin submergence to oceanic depths, which determined morphology of modern slopes, have been identified. It is shown that the horst and graben system recorded all over the Arctic Basin, occurred at the orogenic stage of the growth of elevations, broken in the course of orogenesis into intermontane and piedmont depressions and troughs. A huge time gap between the submergence to the ocean depths (Middle Miocene) and the formation of the horst and graben structure has been established. Grabens’ dimensions are very modest and do not correlate with known rifts.
Keywords: Arctic Basin, Arctic Ocean, seismic data interpretation, submergence to ocean depths, age and extent of rifting, horst, graben, intermontane and piedmont depressions and troughs.
Для цитирования: Дараган-­Сущова Л. А. О времени главного погружения до океанических глубин и масштабах разновозрастного рифтогенеза в Арктическом бассейне по результатам интерпретации сейсмических данных / Л. А. Дараган­-Сущова, В. Н. Зинченко, Ю. И. Дараган-­Сущов, И. Н. Савельев // Региональная геология и металлогения. – 2019. – № 80. – С. 5–20.