Seismic survey data interpretation resulted in describing six overlapping accumulative sequences forming the Don–Kuban deep sea fan. Three lower sequences belong to the Don fan in the mouth of canyons abeam of the Kerch Strait. Three upper sequences records present systems of channels, levees, suprafans relative to the Don fan and Kuban fan pertinent to the Anapa canyon. In the records, identification of six Don–Kuban deep sea fan sequences, which correspond to the Neopleistocene superhorizons (climatorythms), facilitates seismic stratigraphic subdivision of the Neopleistocene sediments section in the Black Sea abyssal basin. The Don–Kuban deep sea fan section can refer to a key seismic stratigraphic section, stratotype of the Neopleistocene stratigraphic boundaries of the abyssal basin.

In the Anabar diamondiferous region, within the unique placer deposits of the Ebelyakh, Billyakh, and Mayat rivers, blocks of conglomerates containing diamonds and high concentrations of kimberlite indicator minerals are widespread in the deluvial sediments. These conglomerates have not been identified in situ. Single fossil findings proposed the Carboniferous age for these formations, which implies the Paleozoic age for the primary source of the Ebelyakh placers. This paradigm encourages exploration for the primary sources of the unique placers but without success. The paper presents U-Pb (SIMS SHRIMP-II) detrital zircon dating data from these conglomerates; they demonstrate a wide age range, with the youngest values corresponding to the Early Cretaceous, which correspond to the timing of erosional-karst depressions developed extensively in the study area. These findings require a substantial revision of strategies for primary diamond deposits exploration in the Anabar region, accounting for the Mesozoic age of the target kimberlites, which could significantly reduce exploration costs.

The paper describes technological support for Monitoring the State Geological Map of the Russian Federation and its continental shelf at a scale of 1 : 1,000,000, third generation (SGM-1000/3). Monitoring the SGM-1000/3 from 2002 to 2025 provided data for the paper. The article describes key data resources for the SGM-1000/3 monitoring activities. The Serial Legends data resource was originally created to update series legends of the SGM-1000/3 sheets, although it is currently integrated into the monitoring activity and significantly expanded to work with sheet legends, allowing for generating symbols in the data publication application of the Unified geological-cartographic model. The web application ggkmon-webm-ap enables access to the Model database via the Internet. The data loader program for the Unified geological-cartographic model database and the automated data verification program MapInspector not only facilitate map sets data upload but also validate against regulatory documents. Additionally, the article provides an overview of data content, verification and loading technologies, data publication, and procedures to work with data resources when accessing data.

Boris P. Markovskiy is a famous national scientist, prominent representative of the scholarly school at the All-Union Geological Research Institute (VSEGEI — currently Karpinsky Institue, Saint Petersburg). He devoted most of his life to studying the Ural subsoil areas and geological history, and his legacy was profound: books, articles, paleontological collections, unpublished papers. The article presents B. P. Markovskiy’s materials from his paper Frasnian Stage brachio-pods in the West Urals (1948), which Karpinsky Institute stocks. The major part of the paper covers detailed descriptions of the Upper Devonian Frasnian Stage sections in the basin of the Zigan and Zilim rivers, as well as monographic descriptions of 121 brachiopod taxons, 37 of which B. P. Markovskiy was the first to identify. It is currently the most complete taxonomic composition of the Frasnian brachiopods from the South Urals western slope sections. The article pays tribute and respects to our senior colleague and master.

Gravimetric data allowed mapping a northeastern left-lateral strike-slip in the junction zone of the Buzuluk depression, Pugachev arch, Orlyanskoye-Iva-novskoye protrusion, and Sernovodsk-Abdulino aulakogen in the Volga-Ural oil and gas province. It has an amplitude of about 50 km and a length of over 300 km. A chain of low-amplitude disturbances stretches along the strike-slip. The gravitational field transformations calculations confirm the disturbance. The strike-slip is likely to impact on hydrocarbon deposits localization in the region. The paper aims to study the structure of the Buzuluk depression, Pugachev arch, Orlyanskoye-Iva-novskoye protrusion, and Sernovodsk-Abdulino aulakogen junction zone from the 3D common depth point method seismic survey data in the Zalesskaya area, its oil and gas potential, and “reconstruction” of possible strike-slip events. The study demonstrates that the region is likely to have northwestern left-lateral horizontal strike-slips with an amplitude of up to 5 km. Their strike coincides with the radial fault of the Sverdlovsk ring megastructure and strike-slip identified by gravimetric data. The “reconstruction” results in an expected strike-slip fault zone of a “jagged” type crossing the Zalesskaya area. Its direction coincides with annular faults of the megastructure. Most hydrocarbon deposits and promising structures of the Zalesskaya area are concluded to be associated with lines of expected disturbances of the strike-slip fault zone and their intersections.

The paper describes experience in using pulsed neutron logging equipment (AINK-PL device) to solve prospecting and exploration work tasks, based on two wells exposing the Achimov complex reservoir rocks in a field located in the Yenisei-Khatanga structural-facies area. The domestic AINK-PL complex has been effectively implemented at the Rosneft Oil Company’s facilities since 2023. The AINK-PL processing methodology in RN-Geology Research Development quantitatively determines a detailed chemical composition of rocks (16 elements), macroscopic capture cross-section, and hydrogen content (neutron porosity). In the article, chemical elements obtained with an impulse neutron-gamma spectrometry method may serve as indicators for determining the typical mineral composition of a section, with the core data missing. There is analyzed the influence of the impulse neutron-gamma spectrometry method and gamma-gamma density logging on the volumetric component model results. Sequential exclusion of these methods from input data results in an underestimation of rock-forming minerals and decrease in the sandstone proportion (clay content increase) in the total rock volume. Exclusion of the gamma-gamma density logging from input log data leads to a porosity ratio decrease, as compared to core data (~2 % absolute). The obtained results prove efficiency of the optimal logging complex for subsequent exploratory and production drilling.

The paper describes little-known Agnie-Afanasyevsk and West Shandong gold ore fields localized at the end of the Tanlu transregional fault, at the intersection points with regional faults. The Agnie-Afanasyevsk field is large-sized (70 km2), has a prolific gold deposit partially mined 340 m deep, and a semi-annular fault grid that controls prolific, mined gold placers. The mineralization depth is 500 m as wells prove, the probable one is up to 1 km. The ore field identifies several gold-bearing zones in total length of 7 km, with an average gold content of 3 ppm. Some geologists estimate that gold resources here correspond to average deposit reserves, up to 200 m deep. The West Shandong ore field is localized at the intersection of the northeastern Tanlu fault with the latitudinal fault. By now, there have been explored two giant gold deposits with gold reserves of 1,300 and 1,200 tons 2 km deep. The ore field localization within the same regional fault and in similar fault grids contributes to a high assessment of the Agnie-Afanasyevsk ore field prospects in the Amur River region of Russia and considers it as a potentially giant gold ore object in the region.