CYCLIC FORMATION OF GEOLOGICAL STRUCTURES OF ALTAI AS A POSSIBLE CONSEQUENCE OF THE PULSATING EVOLUTION OF THE EARTH

Yu. A. Turkin

Gorny-Altai Expedition, Maloyeniseiskoye, Biysk district, Altai Territory, Russia

The paper considers the sequence of stages (80–90 mln years) and steps (40–45) of geological evolution of Altai and adjacent territories revealed in the framework of the plate tectonics concept. It is shown that the stages and steps of formation of the structural and compositional complexes and the structural assemblage of the region with the 2nd-rank geogalactic pulsations (86.4 mln years) and their compression and extension phases (43.2 mln years) distinguished within the framework of the pulsating evolution of the Earth are synchronous. Three major phases of tectogenesis (Middle-Late Ordovician, Middle-Late Devonian, and Middle Carboniferous – Early Permian) were found to correspond to three phases of uncompensated compression in the 2nd-rank geopulsations with the general 1st-rank compression of the Earth in the background. The author established that the subsequent long period of the Altai structures evolution from the Middle Permian to the Early Paleogenic (with decreasing tectonic activity and prevailing rift-related processes) coincides with the Earth’s global extension phase. The main region evolution stages are synchronous to the Earth’s geogalactic pulsation phases of both ranks in terms of the time of occurrence and geodynamic trend and are in good agreement with the periods of maximum endogenous activity, identified within the framework of the plume tectonics. The author concludes that there are no contradictions between these three concepts, and that they can be jointly applied in regional geological reconstructions.

Keywords: stages, steps, cycles, phases, geogalactic pulsation, compression, extension, Altai.

DOI 10.20403/2078-0575-2017-3-95-107

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