A statistical analysis of the distribution of crystal structures of 6006 minerals by syngonies, symmetry classes and space groups was carried out. Important changes were recorded compared to similar samples of the early 21st century. A conclusion was made about the complete occupancy of 32 symmetry classes by mineral structures. A decrease in the number of empty space groups in structural mineralogy to 34 was noted. For the first time, a conclusion was made about the complete occupancy of space symmetry groups by inorganic crystals. 

The results of a geochemical study of deposits of the Turonian and Konyak stages in the Saratov Volga region are presented. Based on the obtained geochemical data, the ratios and concentrations of key chemical elements are calculated, reflecting changes in sedimentation conditions: basin depth, hydrodynamic activity, climatic factors, and other parameters.

In the Lower Cretaceous reference section in the vicinity of the village of Verkhorechye (Bakhchisaray district, Republic of Crimea), rare ammonites were found: upper Valanginian Himantoceras lessinianum Faraoni et al. and Valanginian-lower Hauterivian Olcostephanus densicostatus (Wegner). These findings clarify information about the taxonomy and geographic distribution of ammonites and confirm the existence of a close connection between the Crimean paleobasin and the Western Mediterranean paleobasins. 

This paper reviews the structure and formation history of the Chilektinsky pluton, located in the Eastern Magnitogorsk zone of the Southern Urals. The pluton is composed of plutonites of two complexes, the Krasninsky (tonalite series) and the Chilektinsky (subalkaline series). The Chilekta complex of monzodiorites, granosyenites and moderately alkaline granites was identified for the first time, its isotopic age (380 Ma) was proved by U-Pb dating (LA-ICP-MS) on zircons. The Chilekta pluton was formed as a shear magmatic duplex on the northeast-trending left strike-slip fault. 

The article is devoted to determining the level of the reservoir adjacent to the ancient city of Phanagoria (the southern shore of the Taman Bay) in the period from the 5th century BC to the 5th century AD. It was shown that the water level at the boundary of the 5th–4th centuries BC was at around 2.7–3.0 m below the modern level, and by the 3rd–4th centuries AD it rose to –1.5 m below the modern level. In addition, it was possible to localize the coastline of the city as of the 4th century AD and refute the thesis about the flooding of the coastal area of Phanagoria as a result of marine transgression. 

The study of the stages of hypogene mineral formation, the identification of productive paragenetic mineral associations, and the mineralogical and geochemical zonation of ore deposits are among the most relevant issues of geological science. Solving these problems is a necessary condition for the scientific forecasting of the ore potential of deposits and for increasing the efficiency of geological exploration in analogous objects. In this regard, mineralogical and geochemical features of Uzbekistan’s gold deposits have been analyzed. 

The content and purpose of the main types of engineering surveys for construction, which include engineering and environmental surveys, are characterized. It is shown that during the latter soil massif should be investigated as an ecological-geological system, which is a certain volume of the lithosphere with biota functioning in it and on its surface. lithosphere with biota functioning in it and on its surface. Characterized the content of this system, its structure and the position of the lithospheric block as a lithotope in the structure of the ecosystem as a whole. Ecological functions lithosphere and types of geologic indicators studied in the process of engineering-ecological surveys and assessment of ecological-geological systems and ecosystems as a whole. The role of geologic objects, including significance of modern geologic processes, in the structure of modern engineering-ecological surveys is evaluated. 

The methodology of probabilistic assessment and mapping of the risk of pollution of artesian aquifers based on calculations of the travel time of vertical migration of pollutants coming from the surface, analysis of spatial correlation and stochastic modeling of its values has been developed. For the territory of Moscow, a model of the map of probability of risk of contamination of the Podolsko-Myachkovskii Carboniferous aquifer with oil products coming as a result of vertical migration from the Meso-Cenozoic aquifer was created.

This article, using numerical modeling, quantitatively assesses the influence of the casing on temperature measurement results in a borehole. The influence of convection and the position of temperature sensors are also discussed. The location and number of monitoring boreholes in the natural landscape and the size of the observation sites are also considered. It is shown that in some cases, the casing can alter the temperature measurement results, and its influence must be taken into account. 

Geochemical characteristics and normalized patterns of rare earth elements (REE) were studied in 16 water samples collected from rivers and lakes in temperate and boreal regions of Russia. It was shown that the studied waters exhibit a typical REE pattern, with light REE being more abundant than heavy REE. Moderate to high positive correlations were observed between REE concentrations and dissolved organic carbon and iron in lake waters, indicating a potential role of organomineral colloids in REE transfer. In some of the studied reservoirs, anomalies of Ce due to its oxidation on the surface of Mn oxides and Fe oxyhydroxide colloids and Eu which is associated with the contribution of groundwater to the nutrition of the studied rivers and lakes were noted.

Four generations of veins at the Dukat gold-silver deposit are controlled by extensional flower structure, which also controls the entire Balygychan-Sugoi volcanic graben in the rear of the Okhotsk-Chukotka volcanic belt. The Order I faults, controlling the basin, occur some 10–15 km from the mapped Cretaceous volcanic rocks of the basin, which is well expressed on gravity map. The deposit area has numerous ENE-trending Order II faults, forming a parquetry-like structure every 200 to 600 m. Only orebody of Zone I occurs along such faults. The other 120 ore veins and zones fill in the Order III faults of the extensional flower structure. Quartz veins of first generation occur locally. Veins of second, third and fourth generations reveal zoning. Quartz-adularia-chlorite veins of the second generation occur almost exclusively to the southeast of Zone I, whereas quartz-rhodonite veins of third generation are both to the southeast and northwest from Zone I. Quartz-silfide veins of fourth generation are known only to the northwest of Zone I. Previous works showed that veins of third and fourth generations formed after a 20-million-year hiatus after the veins of first and second generations. This time gap corresponds to structural reorganization and unconformity within the volcanic basin that reflects the evolution of the hosting extensional duplex. 

Geological studies of the Antibes and Marivelles volcanoes of the Luzon island arc, part of the Philippine Mobile Belt, have been carried out. New data on the stratigraphy of volcanic and volcanogenic-sedimentary Pliocene-Quaternary deposits have been obtained, and detailed geological maps of volcanoes have been compiled based on geological mapping and decoding, which differ significantly from those available at the beginning of the research. The history of volcano formation, the dynamics of volcanism during the Pleistocene–Holocene, and the geodynamic features of the volcanic zone are considered. 

New high-resolution geophysical material and bottom sampling results are discussed, essentially complementing to the previously published data on the seafloor morphology and the characteristics of the upper sedimentary section. On the sea bottom a system of relict grooves of iceberg ploughing (ploughmarks) formed in a periglacial basin about 15–11.7 thousand years ago and deposits of mixed composition indicative for an intense mechanical impact of iceberg keels on the seafloor were mapped. The elongation of the ploughmarks from west to east corresponds to the general drift of icebergs in the central part of the Baltic Basin. New data and a more detailed model of Pleistocene degradation of the Baltic Ice Sheet will improve understanding of a behavior of modern ice sheets under changing climate conditions. 

The article presents the results of paleomagnetic and petromagnetic studies of two Upper Jurassic sedimentary sections of the Russian Plate: Pochinki (Nizhny Novgorod Region) and Dubrovskoye (Republic of Mordovia). The rocks of the studied sections demonstrate a good quality paleomagnetic record, which made it possible to carry out a component analysis and calculate the average paleomagnetic directions of the characteristic component of magnetization. The results of the component analysis, petromagnetic researches and microscopic study of the rocks confirm the secondary nature of the characteristic component of magnetization associated with the replacement of framboid pyrite by magnetite at the stage of late diagenesis, which excludes the possibility of constructing a column of magnetic polarity of the studied sections.

The article analyzes the influence of differences in climatic conditions of the European territory of Russia on the spatial heterogeneity of groundwater flow and its modern climatic changes based on long-term observations of river flow. It was found that the difference in the hydrogeological structure of the Moscow and adjacent artesian basins determines the different nature of climatic variability of groundwater flow within their boundaries, which is also manifested in its proportional ratio to the total river flow. At the same time, spatial differences in modern climatic changes in groundwater flow and minimum river flow are due to the heterogeneity of landscape conditions in river basins, while structural and hydrogeological factors are of minor importance.

The article provides information on the organization of work at the Faculty of Geology and Soil Science during the Second World War, based on archival materials from Moscow State University. 

The Upper Kolyma Goldfields, discovered in the early 20th century, produced more than 3000 t of gold just from placer operations. This metal financed the USSR industrialization in the 1930s and Lend-Lease supplies during the WWII. In the 21st century, while gold continues to come from the placers, the main output of Kolyma gold yields from hardrock deposits. At different times, self-taught prospectors and professional geologist, graduating the Leningrad and Moscow High Schools, provided key contributions to development of this World-class gold province.