Download PDF

RESULTS OF PALYNOLOGICAL AND PALEOCARPOLOGICAL ANALYSES OF THE LATE NEOPLEISTOCENE INTERGLACIAL AND PERIGLACIAL DEPOSITS (EAST TYVA HIGHLANDS, SERLIGKHEM INTERMOUNTAIN BASIN)

M. V. Mikharevich 1, S. G. Prudnikov 2

1 Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia; 2 Tuvinian Institute for Exploration of Natural Resources SB RAS, Kyzyl, Russia

The last Late Pleistocene glaciation deposits of the tongue-like basin, as well as an interglacial alluvium overlapped by glaciofluvial have been studied on the basis of application of palynological and paleocarpological methods of analysis in the basin of the middle course of the Yenisei River. The tongue-like basin deposits were compared with those previously studied by researchers in headwaters of the Kharal River (Azas glacial complex), formed according to OSL dates in the interval of the end of MIS-3–MIS-2. Fluvioglacial overlapping an interglacial alluvium is compared with the same glacial complex. A rather large scattering of absolute dates, some of which fall within the last Neopleistocene thermochron, palynological and paleocarpological complexes from glacial deposits characterizing the stage of glaciation degradation, raise the question of independence of the second Late Neopleistocene one. Further geochronological study of the interglacial alluvium section is proposed to clarify the lower time boundary of the Azas shield glacier.

Keywords: last Late Pleistocene glaciation, Azas shield glacier, tongue-like basin, interglacial alluvium, palynological analysis, paleocarpological analysis.

DOI 10.20403/2078-0575-2023-2-3-9

​ ​​​