ИСТИНА

The Roscosmos corporation considers the South polar region of the Moon as the primary target for the Russian lunar program. Significant interest in this region is linked with the enhanced concentration of hydrogen in the regolith and various geological processes associated with the possible presence of ground ice. The largest and oldest known lunar impact basin is South Pole - Aitken (SPA). The present relief and geological structure of the studied region are associated with the SPA impact. The SPA remnants have a high scientific capability because of the ancient material of lunar crust and the possible availability of ancient mantle material. The ejecta of younger craters is also interesting as they contain ancient material excavated from beneath the SPA blanket. The impact process is the primary agent of the re-distributor of material on the Moon. As a result, contiguous ejecta, rays, satellite, and secondary craters around the primary craters can be formed. Here we present the model estimates of the ejecta thickness in the pole region (upper 65 ̊S) for Nectarian, Imbrian, Eratosthenian and Copernican craters. Our estimates are based on the new geological map of the southern polar region of the Moon compiled at 1:300,000 scale [1]. Pre-Nectarian craters did not consider our research because of the poor preservation state and overlapping ejecta by younger deposits.