Yu.F. Filippov
Geological model of the Pre-Yenisei Proterozoic – Palaeozoic sedimentary basin in the south-east of the West Siberian Province
DOI: 10.31087/0016-7894-2018-4-53‑62

On the results of regional seismic surveys and drilling wells, the development of gently dislocated Upper Proterozoic and Lower Palaeozoic deposits of sub‑platform type is substantiated; they occur below the Mesozoic‑Cenozoic sedimentary cover in the east of the West Siberian geosyneclise and form the Pre‑Yenisei sedimentary basin. Integrated analysis of new geological and geophysical data, including geoseismic sections, depth and geological maps, allowed updating a geoseismic model of sedimentary sequences. The paper discusses geodynamic evolution of western margin of the Siberian Craton during Neoproterozoic and Palaeozoic. Geological model is substantiated, which considers the Upper Proterozoic ‑ Palaeozoic sedimentary sequence as the cover‑belonging formations of the Kassky‑Turukhansky microcontinent (solid massif) identi fied here. As a result of collision processes in Cryogenian, it was consolidated with marginal parts of the Siberian Platform, and from the Late Neoproterozoic they were developing as a single structure. According to this interpretation, in the Cambrian the western regions of the basin made a part of the active margin of the backarc (marginal) basin; in its back part it was changing to epiplatform basin. Backstripping for Vendian and Cambrian stages was conducted, as well as lithofacies analysis of prospective reservoirs in sedimentary sequences of the basin. Analysis of sedimentary deposits downwarping according to geothermal gradients and pyrolysis studies of organic matter allowed updating the historical context of prospective hydrocarbon pools generation and preservation. The preliminary prediction of hydrocarbon potential of the basin was performed.


Key words: Western Siberia; Pre-Yenisei sedimentary basin; Upper Proterozoic-Palaeozoic deposits; backstripping; hydrocarbon potential.


For citation: Fillipov Yu.F. Geological model of the Pre‑Yenisei Proterozoic – Palaeozoic sedimentary basin in the south‑east of the West Siberian Province. Geologiya nefti i gaza. 2018;(4):53–62. DOI: 10.31087/0016‑7894‑2018‑4‑53‑62.


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Yu.F. Filippov   Scopus   iD 

IPGG SB RAS, Novosibirsk, Russia;


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