The influence of tectonics evolution of passive margin East-European platform (EEP) (within Bashkortostan) to form oil and gas deposits are discussed in the article. Studied territory during more 2.5 billion years was developing from primordial boulder-block framework Archean-Lower Proterozoic foundation to contemporary typical platform beds sedimentary rocks on the given crystal bed. Erode relief of crystalline basement, which constitutes sag along latitude, fill up with consolidative sediments and dipping step by step to East – to Pre-Urals foremost depression. Sedimentary cover contains Rifenian-Vendian and over Paleozoic sediments. The average thickness of Riphean-Vendian sedimentary cover makes up 7.0 km and its total thickness more than Paleozoic in 4.5 times. The average thickness of Paleozoic sediments is 3.0 km. By seismic and aeromagnetic data there were ascertain abatement of dislocating tectonics from the crystalline basement to Paleozoic deflections, which breaks be considered as a rarity. All oil and gas fields (more than 210) were ascertained in Paleozoic deflections, which contain seven Oil-Gas complexes. Its two terrigenous include 88% of total initial hydrocarbon reserves. The rentable masses of hydrocarbon in Riphean-Vendian sediments were not exposed because of fluid-cover absence up to the present time. During a long time, geological conception about classical monocline tectonic pattern of East margin EEP were corroborated by open oil and gas fields in plikative large-scale gross output structures Tuymasynian type. But at 1960s “small grabens”- regionally consedimentary grabens in terrigenous Devonian and postsedimentary grabens in Vendian-Paleozoic geological section are discovered. Than the echelon of consedimentary grabens, the horst-like zones – narrow semi-regional structures of conciseness are determined. The role of all list dislocates is containing in setting up absolutely new zones oil-gas bearing. Ones controlled oil fields with total reserves nearly a quarter of total initial hydrocarbon reserves of the Bashkir region. Detail analysis permits in any way examine well-known geological facts. The ambiguous function of regional and semi-regional dislocates were ascertained. On initial stage, they serve as conductor for vertical migration hydrocarbons and on the late-stage its function transformation to the (tectonic) screen with form oil deposits. Many oil fields settle down in dislocating zones. The efforts of press from the Urals were favourable this prose.
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