Five seismostratigraphic strata (SSS), which can be correlated with different stages of the evolution of the area during the Pliocene – Quaternary, were identified, and their distribution in the mapped area was traced based on a comprehensive analysis of geological and geophysical data obtained during the expedition-2018, carried out by VSEGEI experts for the state map 1000/3 (water area of sheets R-57–60), literary and fund data and correlation with materials on the adjacent land. These data allowed significant refinement of paleoclimatic and paleogeographic reconstructions of natural setting in the Neopleistocene–Holocene within the coastal shelf of the East Siberian Sea. The new map of Quaternary formations at a scale of 1 : 1,000,000 was compiled for the water area.

Results of studying the petrographic and chemical composition and determining the absolute age of basement rocks of the central Siberian Platform are described. Chemically, the analyzed rocks belong to the acid and medium rocks of the normal and moderately alkaline series of the pluton class. The REE distribution spectra, normalized to chondrite, are characterized by the predominance of light elements over heavy ones; at the level of heavy elements, the graph gradually flattens out. The obtained age datings of the rocks characterize four independent stages of the basement formation – 3,16–3,17; 2,83; 2,71–2,72 and 1,90 Ga, which corresponds to the range from the Lower Lopian Erathem (LP₁) of the Upper Archean (AR₂) to the Upper Karelian (KR₂) of the Lower Proterozoic (PR₁).

The geological and tectonic structure of the Bering coal basin has been specified; a methodology for the preliminary determination of small-amplitude geological separations in coal seams was compiled; facies environments of coal formation are identified, described in detail and traced along the section; an assumption was made about the predominant role of thermal-regional metamorphism in the process of coal formation; the geochemical specialization of coals, as well as associated useful components that are potentially of industrial importance, have been preliminarily determined.

The Gerdiz massif in the Polar Urals was identified as an autochthonous granite-pluton of the Ordovician age, formed by seepage of Precambrian schists by granitic material. Оn state maps of the new generation, the Gerdiz massif retains its morphological features, but with conflicting interpretations of its geology. New geological data testify to the artificial allocation of a massif that combines rocks of different origin and age. Intensely dislocated (cataclased) metasomatized rocks of the Khanmeikhoi Formation and an A-type alkaline granite massif were combined into the Gerdiz massif.

Based on the materials of a complex aerogeophysical survey (magnetometry, gamma spectrometry) of a scale of 1 : 50 000, performed on Chaantal Square, the boundaries of intrusive arrays and effusive formations have been clarified. Within the Western part of the Changuan massif and its framing, promising zones for the detection of rare metal, gold and uranium mineralization.

In the Amur gold-bearing province, three placer gold mining centers have been identified – Solovyevsky, Oktyabrsky and Kharginsky, from whose placers, since the XIX century, a significant part (more than 80 %) of the province’s gold has been extracted. Each center consists of several converging ore-placer nodes, confined to the central nuclear part of the province. The centers differ in the typomorphic features of native gold, the composition of minerals associated with gold, and the sources of placer formation. It is shown that despite the long-term operation of placers for more than 150 years and their depletion, the level of gold mining has been steadily maintained in recent years at the level of 7–9 tons per year.

In 2018–2020 within the Biryusinskaya dome structure (Eastern Sayan Region), during the prospecting of the «Sosnovgeologiya», the Vostochno-Stolbovoye uranium ore occurrence, localized near the small uranium deposit Stolbovoye, has been discovered. The study of the ore occurrence geological position and epigenetic transformations of the Early Proterozoic granitoids and the overlying Middle Riphean sandstone has been carried out. A conclusion about the Рre-Middle Riphean origin of the ore concentrations of uranium and their connection with the processes of the weathering crusts formation on granite and possible subsequent transformations of the ore-bearing medium and ore matter has been made.

Results of laboratory studies of Pb-Zn ore from the Dyusembay Central deposit, Central Kazakhstan, are discussed. Petrologic composition was studied using up-to-date methods of process mineralogy, including electron microscopic mineralogical studies. Chemical, X-ray spectral, sieve and phase analyzes and fire assay were performed on 10 small technological samples from various parts of the deposit. Investigations of the petrological composition performed to date showed that the ore of the Dyusembay deposit is characterized by complex mineralogical and chemical compositions and belongs to the Pb-Zn type of ore with a preponderance of Zn over Pb. It is concluded that Pb and Zn are the main valuable components in the ore of the deposit with average contents of Zn 2,6 % and Pb 1,5 %. Most of these metals are part of sulfides. The sulfides are dominated by sphalerite; the galena mass fraction is by an order lower. Iron sulfides (pyrite, pyrrhotite, marcasite) vary within a small range. Silver was found in the ore zone, with an average content in the ore of 10,5 g/t, and in ore intersections it reaches 2,7 kg/t. Other non-ferrous metals, as well as arsenic and antimony, at the current stage of the deposit study, are not of economic interest. Currently, the deposit is explored in detail and then the composition and technological features of the ores will be clarified.

The epochs of lithium ore genesis and economic aspects are considered – reserves, resources and the market of lithium. Conclusions are drawn on the state of the mineral resource base of the world and the tasks of the geological service of Russia. The expansion of the use of lithium in various sectors of the economy necessitates the resumption of work on the assessment of the mineral resource base of lithium in Russia.