The article presents planetary and geological evidence of the hot heterogeneous accretion of the Earth and the existence of a global magma ocean at an early stage of its evolution. It had a composition ranging from acidic in the upper parts to ultrabasic in the lower parts. With this in mind, the genesis of the main igneous rocks of the Siberian platform was considered. The Early Precambrian crystalline complexes arose from the crystallization of the upper parts of the layered magma ocean. Their heterogeneity was due to the multiple subsidence of the crystallized upper parts of the ocean and the emergence of the lower liquid ones. Autonomous anorthosites were formed by intrusion of not yet solidified plagioclase cumulates of its middle and main layers. Alkaline-ultrabasic carbonatite-bearing plutons were formed from the residual melts of the fractionated picrite layer of the magmatic ocean. Very high contents of rare elements in them were due to the long-term processes of their accumulation in the residual melts. The kimberlites arose from the residual melts of the bottom peridotite layer. The diamond in them crystallized due to the accumulation of carbon in the residual melts. Trap magmas were formed as a result of decompression melting processes in the emerging main plumes. Mesozoic alkaline intrusions of the Aldan Shield were formed by frictional remelting of alkaline differentiates of the magmatic ocean in zones of deep tectonic dislocations.

The article presents the results of field and laboratory researches. The goal of the researches was to define potential indigenous sources of gold in the Anabar placer region. The absence of identified primary ore sources of fine grained alluvial gold, widespread in the study area, determine the relevance of the work at the moment. The main task of the research was to study the mineralogical characteristics of the occurrences of disseminated gold-sulfide ores found in the different age strata of the Anabar Shield, its eastern, south-eastern borders and nearby areas. In addition, a complex of typomorphic features of placer gold was studied to determine the relationship with the ore occurrences. The solution of the problems was carried out by the generally accepted methods of the rocks and minerals studying: the mineralogical analysis, petrographic and mineragraphic studies. It was discovered that all the investigated ore occurrences have been formed within the deep fault zones and are associated with metasomatic alteration. Positive factors of ore deposition were for certain areas. These factors include the distributionzones of mylonites and cataclasites, as well as permeable fault zones with tectonic fracturing of carbonate rocks. Based on the discovered indicator typomorphic features of placer gold in the region, the relationship of the placer gold with the examined ore occurrences was revealed.

The articledescribes geochemical features of composition of Mesozoic igneous rocks of the Medvedev massif. The studied massif is spatially located in the central part of Nimnyr terrain and it is a part of Evota gold-bearing area. The Medvedev massif is a multiphase structure (quartz syenite-porphyry, pyroxene- amphibole syenite, monzonite) of the most productive stage of development of the territory - the Mesozoic tectonic-magmatic activation of the Aldan-Stanovoy shield. This workaimed at defining conditions for forming the igneous rocks of the Medvedev massif and its metallogenic specialization. During the study and interpretation of the geochemical data on composition of the rocks, it was revealed for the first time that all rocks of the massif are geochemically specialized for lithophilic elements (Rb, Ba, Sr, B, Cr, V, Nb, Sc), whereas the contents of chalcophilic (Cu, Sn, Zn Pb, Ge) and siderophilic (Ni, Co) elements are much lower. The REE distribution in the rocks of the massif has a smooth negative incline, they are enriched in cerium (La, Ce, Pr, Nd, Sm, Eu) and depleted in yttrium (Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) elements. According to the K/Rb, Rb/Sr ratios and the K/Rb-Rb, Sr-Rb/Sr ratios of elements, quartz syenites are the closest to mantle formations. By the same parameters, pyroxene-amphibole syenites and monzonites are corresponding to the rocks formed from a mantle- crustal source. All rocks of the massif have low values of Nb/La, Th/U and it indicates the contamination of the magmas with crustal substance. The high Y/Nb > 1.2 ratio for the rocks reflects the contribution of both crustal and mantle sources, the presence of which is also indicated by the relative content of europium Eu / Eu * ≈1. A conclusion based on the geochemical characteristics the rocks of the Medvedev massif was madethat they are close to derivatives of the latite series, which can be considered as a part of the gabbro-monzonite-syenite formation type. An assumption about possible gold content in the second phase of the massif intrusion was made. This is indirectly indicated by an increased content of ore minerals and chalcophilic elements, as well as a large amount of miarols. Along with this statement, the close geochemical relationship between gold and potassium may indicate the prerequisites for the presence of the Ryabinovskiy copper-gold-porphyry type of mineralization.

To date, the main oil and gas fields in the Cambrian and Precambrian section of the south Siberian platform are confined to the terrigenous part of the Precambrian sedimentary cover, while in a much more powerful halogen-carbonate (HC) complex of the Vendian-Cambrian and the Lower Cambrian, the little commercial hydrocarbon accumulations were found. Therefore, the prospect of the largest reserve for increasing oil and gas fields is associated with the carbonate complex. Along with the urgency of identifying the causes of existing imbalance in the development of the fields, there is a need to assess the realistic prospects of carbonate complex based on the discussion of nature and the mechanism of deposits formation. It is argued that the fields in the productive formation of the Precambrian terrigenous complex were formed due to sub-vertical fluid flows from sub-fundamental sources under the influence of fault activations of early northeastern generations, and in the productive carbonate horizons of the Vendian-Cambrian and Lower Cambrian - due to the re-formation of the fields in terrigenous formations under the influence of faults of late north-western generation. At the same time, the fieldswere formed in the zones overlapping to faults of earlier generation. This means that in the carbonate reservoirs, it is impossible to achieve the advanced development of deposits, and in determining the order of prospecting the terrigenous horizons should be considered as basic or priority.

To monitor the dynamics of green spaces in the city of Yakutsk, a spatial-temporal analysis of the territory was carried out using remote sensing materials. The studies were carried out on the basis of Landsat 4, 5 and Landsat 8 space survey materials. Space data processing was carried out using the IDRISI Selva program. Monitoring of green spaces was carried out with an interval of 5 years and maps of Yakutsk were compiled. The images were digitized in the Maxlike module. A forecast of spatio-temporal changes in the areas of certain categories of land in the study area for 2028 was made. With the help of CA_Markov chain model, a forecast of land cover change for 10 and 11 years ahead was made. To identify the results of these added layers and to predict changes in greenery, a classification of Maxlike maximum plausibility was made and a table of space-time results of Maxlike modules was made. Error calculations were made based on the data of the temporal analysis of images to check the accuracy of remote sensing data processing with true and predicted data.

The Yakut section of the Federal highway P504 “Kolyma” with a length of 1, 197 km was investigated. A GIS project was created in the ArcGIS format for a further spatial geographical analysis of the main geocryological conditions - the soil temperature, seasonal thawing depth and cryogenic processes using GIS technologies.In total, 12 types of terrain were identified by cutting them out from the Permafrost-Landscape Map of the Sakha Republic (Yakutia) at a scale of 1:1,500,000.The spatial analysis results were visualizedin the form of maps. Quantitative characteristics of the permafrost conditions were given in the form of diagrams. It was revealed that the highway was mainly laid along sections of low terraces (33.2 % of the total area of 100 m zone) and the inter-alaas type of terrain (10.3 %), composed of high-ice deposits. In these areas, frost cracking was most often expressed in combination with other cryogenic processes (53.6 %) and thermokarst (21.7 %). The temperature of the soils in landscapes of the studied territory predominantly varied from -2°C to -4°C, with the lowest temperatures (-9°C) found in 3 % of the territory in the mountain lichen tundra of the Verkhoyansk Range. The maximum depths of seasonal thawing (> 2.5 m) can be traced only on 5 % of the total territory. The prevailing value of seasonal thawing depth was 1.5-2 m. The creation of a geoinformation system for the Kolyma Federal highway made it possible to collect data together in digital form, which is very convenient for their subsequent use, constant replenishment and correction of databases. This has improved the quality and speed of spatial data processing and time-consuming quantitative analyses.

The article reveals the technique of zoning sacred landscapes in Yakutia. The territory has sacred objects of various origin, which form a sacred landscape. The development of a territory is the first stage of its transformation, which means the birth of sacred objects and landscapes (cultural) through the worship of which people embodied their vision of the world. Sacred places are spiritual centers - the nuclei of the sacred landscape on any area that fill them with meaning (sacred, memorial, historical, etc.). The geography of sacred objects and sites in the spatial organization of territories is not accidental. It is influenced by many factors: natural, climatic, religious and ethnosocial, which reflect the characteristics of the landscapes of residence, traditional beliefs, as well as the culture and customs of peoples. The Sakha Republic (Yakutia) has unique natural and cultural landscapes, on which sacred landscapes have been formed, for a long time they were associated with the beliefs of peoples. However, they have not been sufficiently studied, there is a significant problem of collecting, interpreting and preserving information about the sacred objects in Yakutia. The issue of integrating sacred objects into tourism activities, on the one hand, may enter into the topic of introducing the cultural heritage into the tourism industry; on the other hand, it should be borne in mind that sacred places and objects affect the spiritual part of the culture of the people, and, therefore, other criteria should be applied to them when used for tourism purposes. Their adequate integration into tourist activities on the territory of Yakutia, the identification of regions and typical areas of distribution of sacred landscapes and their classification will help to identify the most attractive places for the development of tourist activities in the republic. The method of zoning the sacred landscapes in Yakutia and their importance in tourism is the purpose of this article. The zoning became possible with the systematization and description of sacred sites. Geographic, nature- centric and culture-centric approaches contributed to the determination of the characteristics of sacred sites and their grouping by ranges on the territory of Yakutia. The material for the article is mainly based on field materials personally collected during the field trip in July 2018. As a result, a systematization and description of sacred objects and zoning were compiled. As a result, the zoning of the sacred sites in Yakutia was carried out - 5 regions and 11 areas were identified there. Recommendations for inclusion of sacred objects in tourist activiteswere developed. The results of the research were summarized in more detail in the Master’s thesis.