SEQUENCE STRATIGRAPHY OF THE BERRIASSIAN-LOWER APTIAN DEPOSITS OF WEST SIBERIA
S.V. Ershov
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: Нижний мел, сиквенс-стратиграфия, сиквенс, системный тракт, клиноформа, цикличность осадконакопления, Западно-Сибирский осадочный бассейн, Lower Cretaceous, sequence stratigraphy, sequence, systems tract, clinoform, cyclicity of sedimentation, West Siberian sedimentary basin
Abstract
The geologic structure and conditions of formation of a Lower Cretaceous clinoform complex in West Siberia are examined based on sequence stratigraphy. The regional Berriasian-Hauterivian clinoforms are interpreted as third-order sequences, and their formation should be considered in terms of the Depositional Sequence III model. Productive beds of both shallow and deep marine as well as continental genesis formed mostly in a regressive basin and belong to the highstand systems tracts.
|
