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Stratigraphy and Paleogeography

January 01, 1991


The West Siberian basin occupies an area of approximately 3.5 million km2 (1.3 million mi2), including the South Kara basin and part of the Khatanga basin, which geologically are a part of the West Siberian basin (Figures 8, 9). The basin is bounded by the Uralian and

Novaya-Zemlya uplifts on the west and northwest, the Kazakh and Altay-Sayan uplifts on the south and southeast, the Siberian craton and Taymyr uplift on the east and northeast, and the North Siberian sill on the north. Thickness of the Phanerozoic sedimentary cover ranges from approximately 3-5 km (10,000-16,000 ft) in the central parts of the basin to 8-12 km (26,000-40,000 ft) or more in the northern part (Figures 10-15). The post-Paleozoic basin (including the South Kara Sea and Khatanga basins) is filled with approximately 16 million km3 (4 million mi3) of Mesozoic-Cenozoic sedimentary rocks ranging in thickness from 3-4 km (10,000-13,000 ft) in the central area to 8-10 km (26,000-33,000 ft) or more in the north (Figures 15-19). The Mesozoic-Cenozoic fill is less than 1 km (3300 ft) thick along the North Siberian sill, which is a basement high of Mesozoic age extending between the northern end of the Novaya-Zemlya and the northwestern part of the Taymyr uplift (Figures 9,16). On the southwest, the basin is connected with the Ust-Urt basin region through a narrow trough between the southern Ural Mountains and the Kazakh uplift. In latest Cretaceous and early Tertiary time, the West Siberian Sea was connected with the Tethys sea through this passageway (Figure 9).

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AAPG Studies in Geology

Geology and Hydrocarbon Habitat of the West Siberian Basin

James A. Peterson
James A. Peterson
U.S. Geological Survey Missoula, Montana, U.S.A.
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James W. Clarke
James W. Clarke
U.S. Geological Survey Reston, Virginia, U.S.A.
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American Association of Petroleum Geologists
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Publication date:
January 01, 1991




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