The problem of the Bodaibo graben formation has been considered within the framework of the proposed tectonic scheme of the Baikal-Patom fold belt crystalline basement — the Paleoproterozoic Baikal-Viluisk granulite-gneiss belt, which divides the foundation of the Siberian platform into Anabar-Mirninsky, Nepsko-Botuobinsky and Aldan-Stanovoi geoblocks. The Baikal-Viluisk granulite-gneiss belt is expressed by a system of blocks having a common northeastern direction and forming uplifts and grabens. As a result of the transpession interaction of the Nepsko-Botuobinsky and Anabar-Myrninsky geoblocks with Aldan-Stanovoi one in the Paleoproterozoic, the frontal part of the former was elevated with the formation of metamorphic rocks of Sarma-Tonod zone of outcrops and with the simultaneous descending of the Aldan-Stanovoi geoblock marginal part and the formation of the Olokit and Bodaibo grabens. The Olokyt graben was filled with the detrital material from the Nepsko-Botuobinsky and Anabar-Mirninsky geoblocks, and the Bodaibo graben — mainly by the products of the metamorphic rocks destruction of the Aldano-Stanovoy shield, including the gold-bearing metabasite complexes.

For the first time, the mineral composition and gemological characteristics of the petrified wood from the Ulyanovsk region, of jewelry and ornamental quality, have been studied. The petrified wood is associated with the Lower Cretaceous deposits and consists mainly of calcite (up to 73 mass. %); pyrite, apatite, gypsum are present; dolomite, anhydrite, hematite, pyrolusite, organic matter and X-ray amorphous substance have been fixed. According to the technological and decorative characteristics, the petrified wood of the Ulyanovsk region is a quality jewelry and ornamental material of the florogenic group.

The paper presents the results of the study of the material composition of Upper Cambrian-Lower Ordovician Manitanyrd sandstones series in the southern part of Engane-Pe Ridge (Polar Urals). The study of the lithological and geochemical characteristics of feldspar-quartz sandstones has confirmed their formation in a shallow-water basin at the passive continental margin in a cold climate. An episode of volcanic activity, associated with the epicontinental riftogenesis, resulted in the appearance of a sub-comformable body of ultra-potassium basaltoids, and at a distance from it, there is a sandstone horizon containing "concretion" formations. In the composition of the sandstones there is a slightly altered volcanomictic material but they lack of recycled fragments and redeposited material of the weathering crust. The petrochemical features of Manitanyrd sandstones do not allow expecting sedimentary gold mineralization in them.

Bulging recrystallization (BR) has been considered in the deformed quartz veins in the lower Triassic sandstones of the metagenesis zone in the North-Western part of the Kular district, Yakutia. BR is characterized by the formation of sutured boundaries of individuals during the crystalloplastic deformation of quarz. To these boundaries, the recrystallization grains are confined, the size of which (in this case, 0,01—0,02 mm) corresponds to the size of the teeth at the boundaries of individuals. Such fine recrystallization grains can fix with their formation the peak crustal stresses arising up during deformation of the continental crust near the brittle-plastic transition. Inside the individuals, BR is accompanied by recrystallization along the microshears and deformation bands with the leading role of progressive rotation of subgrains. BR in vein quartz occurs during the formation of the pressure solution cleavage in the host sandstones, and therefore the combination of the pressure solution cleavage in the sandstones of the metagenesis zone and BR in vein quartz can be considered as structural paragenesis.

The main source of mined diamonds in Russia is the Yakutia diamond-bearing province (YAP). To date, all open areas within the prospective Vilyuy-Markha deep fault zone (VMZ) of the YAP, which is a mineragenetic and which hosted diamond deposits of Mir, International, Nyurbinskaya, Botuobinskaya, have been studied satisfactorily. It is unlikely to reveal new kimberlite fields within its' opened part. In this case, the presence of direct signs of new objects beneath the Mesozoic-Cenozoic strata indicates that the diamond potential of the territory is not exhausted. This was confirmed by the discovery in 2015 of a kimberlite body in the Suldyukar field, which confirmed the presence of the Igyatta diamondiferous region and allows us to view the overlapped areas of the VMZ as the most promising for discovering of the new deposits. However, the search for buried deposits requires improvement of the criteria.

About 1400 placers and several dozens of ore gold deposits are known in the Amur gold-bearing province. Placers are to a large degree worked out, so the future of the province is seen to be in the discovery of the new gold deposits. The paper shows the dependence of the productivity and composition of the native gold placers on the size and formational affiliation of the placer-forming gold deposit. The reference couples have been identified: the gold deposit and the placer formed due to the erosion of its' upper part. For example, the Tokur gold-quartz deposit is a channel-fill placer in Tokur stream, gold-sulphide-quartz deposit Pioneer—the placer in Ulungi river, gold-sulphide-quartz deposit Bamskoe—the placer of Chulbangro river, Berezitovoye gold-polymetallic deposit—placer of the Konstantinovsky stream and gold-silver field Pokrovskoye—placer of Sergeevsky stream. A forecast of new gold deposits of a certain formation has been made according to the parameters of the placer and the composition of the native gold. A similar selection of reference couples of a gold deposit and a placer with the subsequent forecasting of new deposits can be one of the methods for predicting gold deposits in the other gold-bearing provinces.

The results of studying and assessment of the impact of climate change on the groundwater in the Mekong delta have indicated that the exploitation of quaternary aquifers is not enough to solve the task of water supply in the region. Therefore, in the exploitation plan of groundwater in the Mekong Delta, the greatest prospects are bound with Pliocene aquifers. So, by using of carbon radioactive isotope to determine the age and forming conditions of groundwater in the middle Pliocene aquifer in the Mekong Delta, the important information for planning exploitation and zoning of areas subject to restrained exploitation of groundwater is retrieved. The determination of the age with the use of carbon radioactive isotope study in the complex with the geostatistical interpolation techniques allowed creation age map of middle-Pliocene aquifer with high accuracy nad determination the recharge area on the north-east of the Mekong delta (South-Eastern area). From the recharge area, groundwater flows in the south-west direction at a flow velocity of 8 m/year and discharges into the sea (Siam Golf and Eastern sea). It is the first time by using geostatistical interpolation «cokriging» of two parameters (age - key parameter and depth of sampling - extra parameter). The tasks to improve the accuracy of specialized maps in Vietnam have been solved. The age map has been made with the correlation parameter 0,9, that justifies the high efficiency of the studies. Furthermore, results of the correlation between age and concentration chlorine of groundwater in the middle-Pliocene aquifer (n22) allowed making a suggestion, that formation of mineralized water is a result of mixing of meteoric water with the sedimentation waters of initial sea genesis, which were formed during Flandrian transgression which began about 21000 years ago and ended 4200 years ago.

It has been discovered, that depending on the concentration of the thixotropic mixture, the content and properties of the mineral substance of thin classes, the filling mixture based on the current tailings can be represented by a medium with weakly or strongly expressed viscoplastic properties. With an increase of the content of thin classes, which is typical for the current tailings, the resistance to movement of mixtures in pipes sharply increases. To reduce energy costs and improve the reliability of hydrotransportation from blockages, special additives are required to be add into the high-density filling mixtures, which destroy coagulation structures. In this case, the resistance is reduced several times. The use of the thixotropic properties of the filling mixtures makes it possible to obtain a stowage with high strengths and elastic characteristics with the most complete use of the activity of the astringent agents (binding component). In addition, thixotropic mixtures possess mobility necessary for pipeline transport with a significant (up to 2—3 times) decrease in water consumption. The consumption of the astringent agent is reduced by 20—22%. One of the radical ways to dispose of the fine tailings is achieved by using them not only in the filling (stowing) processes, but also for various household needs.

The method of geodynamic zoning experienced in China three periods of its development: «formation», «development», and «innovation». With the help of this method, the models were created linking the block structures of the crustal tectonic plates and coal minefields. A program for calculating the stress state of the rocks massif was developed, taking into account the data on geodynamic zoning. A model of multifactorial recognition and forecasting of the geodynamical danger was developed. The realization of the geodynamical danger in minefields is assumed to demand elaboration of the special conditions in the bearing massif, that's why the indexes and methods for the estimation of these conditions were determined. For the investigations of the connection between the energy of a rock burst and the size of the massif area involved in this process, the corresponding model was created and the conditions of the outbursts were determined. The effectiveness of the method of the recognizing the areas of the increased geodynamic danger was provided with the examples of the particular mines. For the Yue Jin and Jingxi minefields, the outbursts and rockbursts dangerous, threatened, and non-dangerous areas were identified. The application of the preventive measures for the increasing the geodynamic safety in mining is reccomended to have to be based on the results of the forecast.

The temperature dependences of electrical resistance (at DC and AC voltage at 1 kHz frequency) of the samples of the magnetite ore and magnetite from the contact of the syenite-porphyry with the volcanic-sedimentary rocks from the Goroblagodatskoye iron-ore deposit in the temperature range 20—800 °C have been studied. The frequency dependences of the active electrical resistance and dielectric losses in the range 0,01—100 kHz have been obtained at 20 °C. For the magnetite ore and magnetite from the syenite-porphyry contact with volcanogenic sedimentary rocks in the studied temperature and frequency ranges, the relationship between electrical resistance (lgR) and dielectric losses (lgtgδ) has been revealed. The character of the relations is different, that allows to separate uniquely the magnetite ore and magnetite. The parameters of high-temperature conductivity (activation energy E_o and electrical resistance coefficient lgR_o)nave been obtained. The parameters of the studied samples of pyroxene-orthoclase-magnetite, garnet-magnetite, epidote-chlorite-magnetite ores form a straight line, as if forming its different parts. The correlation between the parameters of E₀ and lgR_o, samples of these ores has the following form: lgR_o, — 2,2—6,6 E_o. The parameters of magnetite samples from the contact of syenite porphyry with volcanogenic-sedimentary rocks also form a straight line, as if forming its different parts, with the correlation form as following: lgR_o — 2,1—6,6 E₀ . It has been found that with the increasing distance to the syenite intrusion, the electrical parameters of magnetite ore change: EQ increases, lgR_o, decreases. For magnetite from the contact of the syenite-porphyry and volcanic-sedimentary rocks there is another picture — the further you are from the syenite-porphyries, the smaller E₀ is, and the bigger the lgR_o, is. The T₀ temperatures, at which the electrical resistance at the constant voltage becomes equal to the active resistance at the alternating voltage for the samples of garnet-magnetite ore with the different magnetite content, P,%, have been revealed. The correlation between the T0 parameter and the magnetite content in the ore, P(Fe₃0₄ , %) = 323,4 — 47,4 ln( T₀ ), R₂ = = 0,93, has been established.

The 350th anniversary of the publication of Nicholas Stenon's treatise «On the solid, naturally contained in the solid» is marked in 2019. This work proves possibility of interpretation of spatial relations of layers of rocks from the point of view of the time sequence of the phenomena. N. Stenon linked space and time through the appearance in the same place of different bodies, united by certain spatial and geometric relationships, having created a methodological basis for geohistorical analysis. Having substantiated the continuous-discontinuous structure of the sedimentation process, he concluded that a geohistorical process has a similar structure. N. Stenon made a conclusion about the incompleteness of the geological chronicle and the universality of the stratons, and formulated the principle of actualism. In the treatise, the origin of fossils is defined, the factors of fossilization of remains of organisms are analyzed, regularities of formation of locations are considered, new methodical receptions of deciphering of landscapes of the geological past are developed. Linking the spatial relationships between the layers with the sequence of their formation in time, N. Stenon introduced in geology a new relational genetic concept of time and developed a method for determining the temporal properties and relationships of geological objects.

The guidebook to the Vernadsky State Geological Museum RAS provides the detailed information about the features of the structure and history of the Earth's geospheres, geological activity of living matter and the man. It tells about the riches of the Earth's bowels of Russia, the geological structure of the surroundings of Moscow, the collections of the Museum and its history.