Granitoids of the Malkinsky complex are exposed in the Karachay-Cherkessian horst-anticlinorium fold structure of the Greater Caucasus and penetrated by wells in the Central Ciscaucasia. Separate arrays and their relationships with host rocks are described, their petrographic and petrochemical compositions are given. Based on the results of the studies carried out, it was concluded that the rocks of the complex occupy an intermediate position between the I- and S-types of granites. The absolute age of the rocks of the complex, determined from zircons, ranges from 300 to 325 Ma, and taking into account geological data, the granitoids of the complex are assigned to the Middle Carboniferous.

The position of ring structures on the ice of Lake Baikal relative to hydrocarbon migration objects was analyzed. The data obtained from geological and hydrogeochemical studies and gas surveys show that there is no direct relationship between ring structures and hydrate shows and gas seepage. Geological and geophysical study of the sub-bottom profile in the water area of the most frequent occurrence of the ring structures show that tectonic faults, to which permeable channels are confined, are located directly below them. The latter are the channels for deep discharge of low-temperature hydrothermal solutions into the water column, which can be the cause of anticyclonic ring currents, and, as a result, of ring structures on the ice of the lake.

The article is devoted to gold-bearing copper-molybdenum-porphyry targets of Taimyr and Severnaya Zemlya, which were discovered during geological surveys from 1972 to 2013 but have not been described in literature. Based on the study of the most significant targets and patterns of their distribution, potential ore clusters with localized undiscovered resources and metallogenic areas united in Late Paleozoic and Early Mesozoic structural metallogenic zones were identified. When completing sheets of the State Geological Map 1000/3 of the Taimyr-Severnaya Zemlya series in 2008–2020, the Late Paleozoic-Early Mesozoic Central Arctic gold-bearing copper-molybdenum-porphyry belt was outlined. It is confined to the border of the North Asian Craton and the North Kara Geoblock of Arctida and extends for a distance of more than 900 km, reaching a width of 80 km on the Chelyuskin Peninsula. The leading role in its formation is played by Late Paleozoic-Early Mesozoic plutonic-hydrothermal intrusive ore-forming systems associated with the formation of granite-porphyry intrusions in the Early Carboniferous (340–330 Ma) in Severnaya Zemlya, mid-alkaline granite-porphyry intrusions in the Late Permian (254–258 Ma) in Northern Taimyr, and syenitegranosyenite-porphyry intrusions in the Middle-Late Triassic (249–230 Ma) in Western and Central Taimyr.

Intracratonic basins, which were widespread throughout the world in the history of the Earth’s evolution, are a specific type of tectonic structures in the Paleoproterozoic. They are also important riftogenic orebearing structures. The paper presents an attempt to correlate the evolution of intracratonic riftogenic basins in the Karelian Province, the Fennoscandian Shield (Onega and Kuolajarvi), with similar structures (Wollaston, Hurwitz, and Amer) in the Churchill Province, the Canadian Shield, for a period of 2.3 to 1.9 Ga. This period, particularly 2.1 to 2.0 Ga, is characterized by good correlation for black shale strata with Corg ranging from 2–5 to 10 %, and in the Onega basin, up to the formation of shungite deposits. Although the correlation of these Paleoproterozoic deposits in terms of lithological features and age is quite possible, metallogenically, they are different. This is due to the greater degree of mafite-ultramate magmatism in the intracratonic structures of the Fennoscandian Shield with sulfide, PGE, and Ti-V mineralization, as compared to similar structures of the Canadian Shield, where Au-U mineralization is typical.

A description of a number of gold deposits in the Zimbabwe Province is given. It is shown that the Main Fault is the main element of the structure of the province. It is healed by the Great Dyke with chromite and platinum-metal mineralization. Gold deposits are located in Late Archean greenstone belts and are confined to the faults occurring in echelon towards the Main Fault. Most of gold deposits are of low-sulfide, quartzvein type, others are gold-sulfide-quartz zones of vein-disseminated type, even less often zones of sulfide dissemination. Antimonite is often mined as a by-product.

The article deals with ore formations in the eastern part of the Yana-Kolyma Fold Region, which host gold and silver as the main components. For gold and silver-bearing formations of volcanogenic and plutogenic genesis, structural and tectonic conditions typical of their formation, characteristic producing magmatic and metasomatic ore-bearing formations, mineral types of ores, and metallogenic trend are determined. Examples include the most typical ore clusters (including potential ones), ore fields, deposits, and ore occurrences.

Results of investigation of electrochemical processes using sulfide minerals with the emergence of mobile forms of metal speciation, able to migrate with gas streams are presented. Concentrations and phase composition of mobile components (including nanoparticles) have been determined. Conditions for the metals sorption when passing through rocks are shown. The estimate of the dispersion jet halo formation time for deep-seated ore is given.

The paper describes a new technique for analyzing rocks of various compositions for the content of noble metals, such as Au, Pt, Pd, Rh, Ru, Ir, by inductively coupled plasma mass spectrometry, the main feature of which is the abandonment of acids – oxidizers, which are used in sample decomposition. Results of domestic and international comparison tests, which show that in the overwhelming majority of cases the new technique has undeniable advantages over the traditionally used ones, including with assay melting are provided.

Three new geodynamic settings associated with the presence of the global magmatic ocean that existed at an early stage of evolution have been identified based on the obtained data of hot heterogeneous accretion of the Earth. Evidence is given for the existence of a reverse geothermal gradient in the mantle at this stage and the lack of recent geodynamic settings. The latter emerged in the late Proterozoic after the mantle was heated by the core. Magmas were formed due to the fractionation of the magmatic ocean and by the decompression and frictional remelting of its differentiates.