ИСТИНА

Introduction The Beglitsa and Chumbur-Kosa sections are located in the Eastern Azov region. Here, in the coastal cliffs of the Azov Sea, loess-soil series of the south of the Russian Plain, formed in the middle and late Pleistocene, are exposed. The Beglitsa loess-soil section is a stratotype of the Late Pleistocene LPS of the region (Konstantinov et al, 2018). There are two developed paleosols MIS-5c and MIS-5e, loess sequences MIS-4 and MIS-3, as well as a poorly developed paleosol MIS-3 (Velichko et al, 2017). In the Chumbur-Kosa section, a thick LPS sequence of the Upper and Middle Pleistocene is exposed, where 4 PCs are identified, which correspond to the interglacial epochs MIS-5, MIS-7, MIS-9 and MIS-11 (Chen et al, 2022). The thickness of these sections is about 20 meters. The obtained data on the anisotropy of magnetic susceptibility indicate that the magnetic texture of the loess-soil deposits of the Beglitsa and Chumbur-Kosa reference sections is probably deformed and secondary, and the selected samples are not suitable for paleowind reconstruction. The axes of magnetic anisotropy (K1, K2, K3) are distributed quasi-chaotically, with a significant predominance in the center of the stereogram of projections of long axes, which is not typical for sedimentary rocks (small axes of anisotropy are oriented vertically). We made an attempt to filter the data (first, samples with F > L and Pj > 1.04 were selected, then those with F12>4 and E12<20° were eliminated). However, even after filtration, the distribution of anisotropy axes differs markedly from that characteristic of the primary magnetic texture of undeformed sedimentary rocks. conclusions Based on the results of the performed rock magnetic work, it can be concluded that the main magnetic mineral in the Beglitsa and Chumbur-Kosa sections is magnetite with a small contribution of the hemagite component. Using the Day plot, it was determined that the samples from both sections fall into the same zone (very close to each other), which indicates a slight difference in the sizes of the magnetic particles. The concentration of magnetic particles is very low (visible on the kT curve), the susceptibility is very weak, which allows us to assume that it is not possible to reconstruct the directions of paleowinds from these sections. The work was carried out with financial support from the Russian Science Foundation within the framework of scientific project 22-17-00265.