Palynological characteristics of the Sargaevo sediments of the southeastern part of the Voronezh anteclise

Abstract

Introduction: on the territory of the Voronezh anteclise, deposits of the upper part of the Devonian system, represented by the Frasnian and Famennian stage, are widespread. Palynological studies of the Sargaevo deposits of the study area have been detailed and expanded, taking into account the current morphological classification [1‒3]. Redescription allows updating the taxonomy of dispersed miospores and provides more justified results of palynostratigraphic studies. According to the results of biostratigraphic data, the features of the geological structure of the territory were clarified: age, composition, stratigraphic position, boundaries of the mapped subdivisions.

Methodology: the basis for the work was the selected and studied core material from wells in the southeastern part of the Voronezh anteclise. The total number of samples studied − 10.

Results and discussion: palynological characteristics of the Frasnian deposits of the Sargaevo horizon of the Voronezh anteclise have been established. Comprehensive biostratigraphic studies were carried out, index species, markers and the governing complex of miospores were identified. The distribution of species-indices of the zone Contagisporites optivus−Calyptosporites krestovnikovii (OK) and subzone Acanthotriletes bucerus−Archaeozonotriletes variabilis insignis (BI) was traced [4].

Conclusions: as a result of palynological studies of the Frasnian deposits of the Voronezh anteclise, it was established that the identified miospore complex corresponds in volume to the zone Contagisporites optivus−Calyptosporites krestovnikovii (OK) of the subzone Acanthotriletes bucerus−Archaeozonotriletes variabilis insignis (BI) [4]. The above miospore complex corresponds to the Sargaevo horizon of the Frasnian stage.