Landslides in the North-Western Black Sea coastal zone (NWBSCZ) are a very common natural phenomenon. The analysis of large volumes of original field and compilative geological material shows the determining influence of tectonic factors on the formation of geoecological characteristics of the southern regions of the NWBSCZ. In 2014—2022, a study of the materials of aerospace observations — SRTM (Shuttle Radar Topography Mission) radar topography was performed with statistical data processing in a GIS environment in combination with the results of ground route studies. Descriptions and photos of landslides are given, as well as information on determining the patterns of the spatial location of active landslide zones, the causes and factors of their occurrence, the nature of development and the consequences of landslide activity. On the basis of the tectonolineament analysis, experience was gained in determining the differences in the dynamics of the development of individual active tectonic blocks of the southern part of the NWBSCZ and the scale of their possible perspective influence on the formation of the general modern geological and ecological situation. The result of such work was the materials for the development of recommendations for taking into account the natural geodynamic characteristics of the specific areas under investigation, for the solution of urgent economic issues of planning rational and safe nature management.

The main gold ore territory of Ukraine is Ukrainian shield, mainly its central and eastern parts. Currently, the potential of Ukrainian shield is estimated at 2.4 thousand tons of gold. Gold ore deposits are insufficiently studied and not brought to development. The same can be said about the development of gold placers. But in the case of shallow deposits its study and development may be economically justified, it does not require large capital investments and allows to recoup costs in a short time. This is especially true given the extremely favorable situation on the world gold market in recent years. Erosion and denudation of native deposits certainly led to the formation of deposits of native placer gold in the sedimentary cover on the territory of the Ukrainian shield and its slopes. Significant amounts of geological information on the widespread distribution of placer gold in loose sediments, in the modern basins of the Dnieper, Southern Bug, Don, Black and Azov Sea shelf, have been accumulated. This corresponds to the location of indigenous sources of gold and the general direction of unloading of river systems. Previous geological studies in this area have revealed numerous manifestations of placer gold of various scales, but no industrial facilities have been recorded. Placer gold in the south of Ukraine is characterized by a high mass fraction of gold of small and thin size classes and significantly aleurite-clay composition of gold-bearing deposits. Such characteristics complicate the geological search and real assessment of gold-bearing objects and, provided that standard sampling and processing methods are used in geological works, lead to underestimation of the real gold content. Studies conducted on the most studied placer sites convincingly show that gold is lost when washing samples, even under careful control. And this is a typical situation for many objects (not only Ukrainian), which were studied using the standard method of extracting free gold by gravity. That is why there are reasonable doubts about the reliability and quality of the current assessment of placer gold deposits. In our opinion, the prospects for the search for loose gold on the Ukrainian shield and its slopes are significantly underestimated. The presence of indigenous sources with great resource potential and at the same time numerous known manifestations of different ages and scales of placer gold clearly indicate the possibility of the formation of placers with industrial characteristics in the sedimentary stratum of southern Ukraine. The use of modern technologies for the gold enrichment and extraction, high-precision analytical research and the favorable state of the world gold market force to urgently review the results of previous geological work. The problem of conducting new comprehensive research aimed at auditing the accumulated data, identifying, and studying of placer deposits namely with gold of small and thin size classes is becoming urgent. The result of such work should be the discovery and industrial development of gold placers, which can be the basis of gold production in Ukraine.

The long-term high level of world gold prices against the background of depletion of reserves with easily extracted metal leads to the search for and introduction into industrial development of deposits, even with low-tech ores and sands. This, in turn, requires the introduction of effective technologies for the enrichment and extraction of gold, contributes to the improvement of methods of exploration. At present, numerous manifestations of placer gold of various scales are known in the sedimentary strata of Meso-Cenozoic deposits in the south of Ukraine. But the real picture of the distribution and the actual scale of gold deposits in Ukraine are uncompleted and unreliable. This is due to the inconsistency of the applied search technique, which was aimed at identifying near-subglacial valley deposits, to the actual properties of gold-bearing formations. Gold in most Ukrainian placers is represented mainly by small, fine and dispersed particles in a significantly clay substrate. Therefore, the traditional geological samples washing by tray led to excessive losses of fine gold and to a significant underestimation of the gold potential. That is why we need to revise the results of previously obtained geological data. Detection of placer gold deposits of Ukraine is possible under the condition of increasing the efficiency of the local forecast and the reliability of field research. The most favorable situations for the accumulation of a useful component are structural denudation traps in tectonic depressive zones. The technology of sample enrichment must correspond to the actual properties of specific raw materials in the placer object. The types of technological equipment are given and some ways of increase of efficiency and reliability of test are offered. The article continues the series of publications devoted to solving the problems of studying placer gold content with a dominant share of fine and dispersed gold in sedimentary formations of the south of Ukraine.

The structural position of the Black Sea deep-sea depression is generally determined by its location in the area of intersection of diagonal transcontinental tectonolineament belts. The different thickness of deposits of the same age in different depressions emphasizes the bloc structure of the earth's crust in the water area. Space photographs clearly show the contours of the depression are enveloping by the long arcs of the mountain ranges and valleys of the Caucasus, Ajaro-Trialetia, and the Eastern and Western Pontides. Such large oval and arcuate, partially sequentially superimposed structures (the Miesian plate, Pannonian and Bohemian massifs) are characteristic of the entire southeastern border of the East European platform and reflect the activity of the processes of destruction of its southern foreland in the zone of development of the classic geosyncline. The available data allow us to assume the superimposed nature of the Black Sea depression, formed as a result of mainly vertical tectonic movements in the field of development of mantle plume activations.