... lower reaches of the Ob’ and Yenisei Rivers. The main glacier features are the Ob’, Polui, Nadym, Pur, Taz, and Yenisei lobes ( Fig. 4 ). The orientation of glaciodepressions and bands of marginal glacier formations, outlining them in an arch-like fashion from the south, indicates that within three...

.... Sergienko, B.P. Stavitsky, O.V. Shiganova, O.N. Yakovlev, and others [ 5 – 10 ]. Thus, N.M. Kruglikov et al. came to the following conclusion: The southern and southeastern regions of the West Siberian Plate are characterized by “direct hydrogeochemical zoning, whereas within the Khanty-Mansiisk and Nadym...

..., in Pechora River mouth. Bolvanskii site. A : Poisson’s ratio; B : predicted ( 1 ) and effectuated ( 2 ) fractures. Thus, joint analysis of velocity patterns and velocity ratios may be used to estimate the degree of permafrost “sluggishness” and to detect cryopegs. The presence of cryopegs...

... Formation top to the rocks of the sub-Achimov member, but also to propose the criteria for delineating the upper boundary in the central regions of the West Siberian sedimentary basin within the Khentei hemianteclise, the South Nadym megamonoclise and the Mansi syneclise. Four members are distinguished...

... and the southwestern part by river valleys. Coarse-grained sediment supply was higher in the western than in the eastern part of the plain. The deposits of the Beregovaya Formation were initially very widespread over much of the plain area. The Nadym depression and eastern Mansi synecliseare dominated by channel...

... 52 Nadym-Pur 28 54 – – 12 51 15 52.6 53 52 Yarudei 5 57 – – – – – – 57 55 Nadym 2 53 – – 2 54 1 51.6 53 52 Gubka 8 54 – – 5 51 – – 53 52 Urengoi 3 51 – – 4 50 6 51.7 51 51 Vengapur 9 55 – – 1 53 5 53.1 54 53 Variegan...

... Siberia. The sections of this study are located in the Frolovo, Ob’-Nadym, and Ust’-Yenisei regions, in the Pur-Taz interfluve, and in the Khatanga basin. Lower Cretaceous spore-pollen assemblages were largely studied over most of the territory but their stratigraphic extent remains too wide...

... as 120–140 °C (and even higher) in the biggest depressions of its northern part (Nadym, Bol’shaya Kheta, Antipayuta–Tadebeyakha, and South Kara depressions). The variations allowed us to separate three big temperature zones, whose boundaries are determined by the structural geometry of the Tyumen...

...-Kazym interfluve. Solitary end moraines of the Nadym terminal belt formed during the Ermakovo (Stage 4) glaciation appear only in the Kazym River basin, especially on the right riverside, along the northern face of the Belaya Gora Uplift [ 18 ]. Up the Ob’ valley, there are also tracks of an outlet...

... in the North Surgut region. It was also found in the Northern region in the southern and central parts of the South Nadym megamonoclise. Coccolithophorid relics are occasional in the South and West Tomsk regions and are lacking in the Novosibirsk region and in the Northern region of the South Nadym...

... bank of the Ob’ River in the Nadym region near Kharsoim Village and in the Salekhard reference locality (see Figs. 1 and -2). It consists of a member (5–7 to 30 m thick) of clays, siltstones, and sands, lying between the Khoshgort and Lokhpodgort moraines with the Kharsoim assemblage of foraminifers...

... and Nadym hemisyneclise (see Fig. 4 , B ). Farther, it crosses the western Bol’shaya Kheta megasyneclise and occupies most of the territory of the Yamal and Gyda Peninsulas. Fig. 4. Schematic map of hydrocarbonate ion contents (mg/l) in underground waters of the West Siberian basin...

... are identified by low apparent resistivity or from amplitude attributes. The fault tectonic zones may also create favorable conditions for development of fractured reservoirs. For example, due to intense faulting within the East Milisa uplift located on the southwestern flank of the Nadym–Taz syneclise...

... prospects are located far north of the industrially developed areas of the middle reaches of the Ob River. At the end of 1984, the number of prospects in the basin’s portfolio was only 3 times greater than the number of prospects annually drilled. A significant portion of these new prospects were targets...

... (Chervlenaya area (BH-38), Mid-Nadym area (BH-63), and Tanopcha area (BH-2 and BH-3)), and reach the south of the Yamal Peninsula (Verkhorechenskaya) area (BH-1 and BH-3)). To the north, about 50 boreholes drilled in the Novyi Port field penetrated Precambrian and Paleozoic structures of miogeosynclinal type...

... show that the coccolith-rich member, occurring mostly at the top of the formation in the Salym and Krasnoleninskii regions, can also be traced in the North Surgut region and in the Severnyi region, in the southern and central parts of the South Nadym megamonocline. Coccoliths are absent from sections...

... and microplates) with Precambrian crust: Volga-Ural (1), Timan-Pechora (2), Bol’shaya Zemlya (3), East Ural (4), Yamal-Gyda (5), Nadym (6), Khanty-Mansi (7), Trans-Ural (8), Kokchetav (9), Irtysh (10), Mezhov-Nyurol’ka (11), Kolpashevo (12), Minusa (13), Kuznetsk (14), Gorny-Rudny Altai (15), Tuva (16), East...

... in the left-bank area of the Yenisei River ( Nalivkin, 1933 ; Belousov, 1948 ; Fomichev, 1948 ; Kosygin and Luchitskii, 1960 ; Sokolov, 1960 ; Nakaryakov, 1961 ; Bogolepov, 1963 ; Yanshin, 1965 ). In the 1970s, A.E. Kontorovich, V.S. Surkov, and A.A. Trofimuk ( Kontorovich et al., 1975 ) set...

.... There is little chance to discover any large deposits in the well-explored southern West Siberian Plain and in the middle reaches of the Ob’ River, but we can expect considerable oil reserves in the northern Ob’ region, which occupies a vast territory (500 × 200 km 2 ) of the Nadym-Pur interfluve, called...

... through the Turgai trough and with the northern sea through a series of channels. This suggestion is based on diatoms found by Rubina [ 8 ] in exposures on the Pravaya Kheta River, in the lower reaches of the Nadym River. Greenish-gray clays and silts of thin varved lamination deposited throughout...