GEOLOGIC STAGES OF THE PALEOGENE AND NEOGENE EVOLUTION OF THE ARCTIC SHELF IN THE OB’ REGION (
West Siberia)
V.S. Volkova
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Paleocene, Eocene, Oligocene, Talitsa, Serov, Nyurol’ka, and Tavda Formations, dinocysts, spores, pollen, stages, events, U-shaped valleys
Abstract
The paper is concerned with the structure of the Arctic shelf sediments in the Ob’ region in the Paleogene and Neogene, sampled from boreholes drilled on the Yamal Peninsula, in the lower reaches of the Pur and Taz Rivers. The specifics of Paleogene marine sedimentation in the central and northern West Siberian Plain are studied. The effect of abiotic (tectonic) factors on the completeness of the geologic record is considered, as well as the effect of recent (Oligocene-Neogene) tectonic processes on topography and sedimentation. The borehole sections are compared with the main seismic sections of the Kara Sea and Lomonosov Ridge.
DOI: http://dx.doi.org/10.1016/j.rgg.2014.03.006
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