Rift systems of the Russian Eastern Arctic shelf and Arctic deep water basins: link between geological history and geodynamics

Nikishin, A.M.; Petrov, E.I.; Malyshev, N.A.; Ershova, V.P.

Авторы: Nikishin A.M., Petrov E.I., Malyshev N.A., Ershova V.P.
Журнал: Geodynamics & Tectonophysics
Том: 8
Номер: 1
Год издания: 2017
Издательство: Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения РАН
Местоположение издательства: Иркутск
Первая страница: 11
Последняя страница: 43
DOI: 10.5800/GT-2017-8-1-0231
Аннотация: Abstract: In our study, we have developed a new tectonic scheme of the Arctic Ocean, which is based mainly on seis‐ mic profiles obtained in the Arctic‐2011, Arctic‐2012 and Arctic‐2014 Projects implemented in Russia. Having inter‐ preted many seismic profiles, we propose a new seismic stratigraphy of the Arctic Ocean. Our main conclusions are drawn from the interpretation of the seismic profiles and the analysis of the regional geological data. The results of our study show that rift systems within the Laptev, the East Siberian and the Chukchi Seas were formed not earlier than Aptian. The geological structure of the Eurasian, Podvodnikov, Toll and Makarov Basins is described in this pa‐ per. Having synthesized all the available data on the study area, we propose the following model of the geological his‐ tory of the Arctic Ocean: 1. The Canada Basin formed till the Aptian (probably, during Hauterivian‐Barremian time). 2. During the Aptian‐Albian, large‐scale tectonic and magmatic events took place, including plume magmatism in the area of the De Long Islands, Mendeleev Ridge and other regions. Continental rifting started after the completion of the Verkhoyansk‐Chukotka orogenу, and rifting occurred on the shelf of the Laptev, East Siberian, North Chukchi and South Chukchi basins, and the Chukchi Plateau; simultaneously, continental rifting started in the Podvodnikov and Toll basins. 3. Perhaps the Late Cretaceous rifting continued in the Podvodnikov and Toll basins. 4. At the end of the Late Cretaceous and Paleocene, the Makarov basin was formed by rifting, although local spreading of oceanic crust during its formation cannot be excluded. 5. The Eurasian Basin started to open in the Early Eocene. We, of course, accept that our model of the
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Rift systems of the Russian Eastern Arctic shelf and Arctic deep water basins: link between geological history and geodynamicsстатья

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