UPPER CRETACEOUS AND CENOZOIC STRATIGRAPHY OF THE GYDAN PENINSULA
V.A. Marinov1,2, A.N. Kurchatova3,4, Z.N. Gnibidenko5, O.B. Kuzmina5, E.A. Potapova1, V.V. Rogov3,6, R.B. Khamzin7
1Tyumen Petroleum Research Center, ul. Osipenko 79/1, Tyumen, 625002, Russia
2Tyumen State University, ul. Volodarskogo 6, Tyumen, 625003, Russia
3Institute of the Earth's Cryosphere, Tyumen Science Center, ul. Malygina 72, Tyumen, 625000, Russia
4AO Messo-Yakhaneftegaz, ul. Kholodilnaya, Tyumen, 625048, Russia
5Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
6Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia
7OOO Gazpromneft’-Yamal, ul. 50 let Oktyabrya 8b, Tyumen, 625048, Russia
Keywords: Upper Cretaceous, Paleogene, Quaternary, microfossils, palynology, paleomagnetism, paleogeography, Gydan Peninsula, northern West Siberia
Abstract
The post-Cenomanian sedimentary sequence of the East Messo-Yakha oil and gas field in the southern Gydan Peninsula comprises twelve lithological units (beds) correlated to Upper Cretaceous, Paleogene, and Quaternary regional stratigraphic stages and formations. The facies of the sedimentary units are constrained from lithology and microfossils. The stratigraphic division is based on bio-stratigraphy (fauna and spore-pollen assemblages), paleomagnetism, and geochronology (quartz and feldspar grains dated by optically stimulated luminescence). The deposition record is interrupted by six large stratigraphic unconformities. The obtained data provide new insights into the Late Cretaceous, Paleogene, and Quaternary paleogeography of the area.
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