Geologicheskii Vestnik

The type sections of the Lower Riphean Burzyan Group (Ai, Satka, and Bakal formations) are located in the northeast part of the Bashkirian meganticlinorium. In its central and southern regions, the above formations are traditionally compared with the Bolshoi Inzer, Suran, and Yusha formations. The aim of the studies, the results of which are discussed in this paper, was to analyze some trends in the change in the indicator ratios of trace elements in clay rocks of all six formations in order to obtain arguments in favor of certain variants of their correlation. It has been established that the trends in the average geochemical characteristics of clay rocks of the Burzyan Group in the northeastern and central+southern regions of the meganticlinorium, reflecting the composition of their parent rocks, are quite different. This does not give 100 % certainty that the individual correlation of the deposits of the Burzyan Group in different regions incorrect, but it makes us think again about this problem.

Southern Urals, Bashkirian meganticlinorium, Lower Riphean, correlation. fine-grained clastic rocks, geochemistry

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