Alpha-Mendeleev Rise, Arctic Ocean: A double volcanic passive margin

Nikishin, A.M.; Rodina, E.A.; Startseva, K.F.; Foulger, G.R.; Posamentier, H.W.; Afanasenkov, A.P.; Beziazykov, A.V.; Chernykh, A.A.; Malyshev, N.A.; Petrov, E.I.; Skolotnev, S.G.; Verzhbitsky, V.E.; Yakovenko, I.V.

Авторы: Nikishin Anatoly M., Rodina Elizaveta A., Startseva Ksenia F., Foulger Gillian R., Posamentier Henry W., Afanasenkov Alexander P., Beziazykov Alexey V., Chernykh Andrey A., Malyshev Nikolay A., Petrov Eugene I., Skolotnev Sergey G., Verzhbitsky Vladimir E., Yakovenko Ilya V.
Журнал: Gondwana Research
Год издания: 2022
Издательство: International Association for Godwana Research
Местоположение издательства: Japan
DOI: 10.1016/j.gr.2022.10.010
Аннотация: Data collected by several expeditions to the Arctic Ocean have yielded a seismic stratigraphicframework and basin fill history for the Alpha-Mendeleev Rise (AMR) and adjacent Podvodnikov,Makarov, North Chukchi, Toll, Mendeleev, Nautilus and Stefansson basins. The AMR comprises adouble-sided volcanic passive margin formed in Aptian-Albian time. The North Chukchi,Podvodnikov, Toll, Mendeleev, Nautilus, and Stefansson basins formed synchronously with theAlpha-Mendeleev Rise as failed micro-oceanic basins. Their formation started with rifting andvolcanism at ~125 Ma and ended at 100-90 Ma. Ages are constrained by new isotope magmatic rockages. The region now comprising the Amerasia Basin was in an intraplate tectonic setting duringAptian-Albian times. On the Mendeleev Rise seismic units interpreted as seaward-dipping reflectors(SDRs) form wedges separated by highs. We propose an axial line along the Mendeleev Rise thatseparates probable half-grabens of different polarity. On the western slope of the Rise, all brightreflections have westward dips, while on the eastern slope they have eastward dips. SDR-like seismicunits are common within the adjacent basins as well. Gravity/magnetic crustal modelling for two regional seismic lines demonstrate that the Mendeleev Rise and adjacent basins are associated withstretched continental crust.
Добавил в систему: Никишин Анатолий Михайлович

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Alpha-Mendeleev Rise, Arctic Ocean: A double volcanic passive marginстатья

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