Three stages of geological evolution of granites from the Uralian part of the basement of the West Siberian platform

Granites, especially those that were decompressed as a result of processes of secondary transformations and tectonic movements, hold the greatest potential in the search for oil-bearing rocks in basements of sedimentary basins. Owing to the chemical dating of monazites from collision granites of the...

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Bibliographic Details
Published in:Doklady earth sciences 2017-05, Vol.474 (1), p.520-523
Main Authors: Ivanov, K. S., Koroteev, V. A., Erokhin, Yu. V., Khiller, V. V.
Format: Article
Language:English
Subjects:
Activation
Age
Area
Basements
Earth and Environmental Science
Earth Sciences
Evolution
Geochemistry
Geochronometry
Geology
Granite
Oil
Radiometric dating
Records
Retinoblastoma protein
Rock
Rocks
Searching
Sedimentary basins
Tectonics
Transformations
Zirconium
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Summary:Granites, especially those that were decompressed as a result of processes of secondary transformations and tectonic movements, hold the greatest potential in the search for oil-bearing rocks in basements of sedimentary basins. Owing to the chemical dating of monazites from collision granites of the East Shebur area, the isochrone age of 274.5 ± 21 Ma was obtained. Zircons (SHRIMP-II) yield a concordant age of 277.5 ± 2 Ma (MSWD = 0.77). The Rb–Sr isochrone age of granites (247.4 ± 9.1 Ma) coincides with the emplacement time of the West Siberian rift system. This age records the process of intruding East Shebur granites into the upper crust level during riftogenesis and the extension of the study area. The younger age datings (231 Ma, 60 Ma (U–Pb); 220 Ma (K–Ar)) record the stages of tectonomagmatic activation, recorded in the basement of the Western Siberia oil-bearing areas.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X1705004X