Geology, geography and global energy

Scientific and Technical Journal

REGIONAL STRUCTURE OF PALEOZOIC DEPOSITS OF MANGYSHLAK

2019. №1, pp. 7-15

Zholtaev Geroy Zh. - D.Sc. in Geology and Mineralogy, Professor, The Institute of Geological Sciences named after K.I. Satpaev, ignkis@mail.ru

Iskaziev Kurmangazy O. - C.Sc. in Geology and Mineralogy, General Director, JSC “RD KazMunaigas”, info@kmgep.kz

Biteuova Sofia A. - C.Sc. in in Geology and Mineralogy, The Institute of Geological Sciences named after K.I. Satpaev, ignkis@mail.ru

The actuality of the subject is pressed by the need estimates of new geological prospects in South Mangyshlak. Potentially promising accumulations are upper-Paleozoic deposits, although their nature being the subject of some controversy among researchers. Comparing sections of deep boreholes, which revealed Paleozoic rocks in the Karabogaz and PeschanyMys-Rakushechny elevations, in the Segyndyk trough, on the North Bozashi and Kum-Sebshi elevations, with sections of the Berkut and Otpan suites of the Karatau bar and the Otpan anticline, and taking into account new seismic materials on the Zhazgurli through, the authors came to the conclusion that during the late Paleozoic - late Carboniferous and early Permian ages, in the vast territory of Mangyshlak and in the south of Ustyurt, there was a single sea basin which accumulated grey-coloured carbonate-terrigenous sediments with significant content of organic matter. In other words, existing at the time paleographic and paleo-geodynamic conditions were favourable for development of sedimentary thicknesses. Dislocation of Paleozoic deposits within the limits of the Zhetybai-Uzen bench is weak (South Zhetybai) and is disturbed by upleaps up to the Tenge-Tasbulat line. There are no dislocations of Paleozoic deposits in the areas of Zhazgurli and Segyndyk troughs, and this is confirmed by new materials and data from deep boreholes, drilled in the Segyndyk trough. Results studies allow attributing the grey-coloured car¬bonate-terrogenous upper Paleozoic deposits to the type of of high-perspective. The problem capacity of the Paleozoic deposits has a regional (global) significance for all, so called, young cratons.

Key words: ловушка, suite, dislocation pattern, trough, metamorphism, trap, свита, система дислокации, прогиб, метаморфизм, нефть

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