The Bulletin of Irkutsk State University. Series Earth Sciences最新文献

{"title":"Geological Position, Geochemical and Sm-Nd-Isotopic Composition of Ophiolites of the Sayan-Tuva Forearc Zone","authors":"A. A. Mongush","doi":"10.26516/2073-3402.2019.30.56","DOIUrl":"https://doi.org/10.26516/2073-3402.2019.30.56","url":null,"abstract":"","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125847063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemical Features of Peridotites and Volcanogenic-Sedimentary Rocks of the Ultrabasic-Basitic Massif of Ulan-Sar’dag (East Sayan, Russia)","authors":"О. N. Kiseleva, M. Ras, Е. V. Airiyants, D. Belyanin, S. Zhmodik","doi":"10.26516/2073-3402.2019.27.46","DOIUrl":"https://doi.org/10.26516/2073-3402.2019.27.46","url":null,"abstract":"","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126776124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Landscape-Forming Processes, Factors and Landscape Structure of the South of the Selenga Middle Mountains","authors":"A. A. Frolov","doi":"10.26516/2073-3402.2022.42.102","DOIUrl":"https://doi.org/10.26516/2073-3402.2022.42.102","url":null,"abstract":"The article studies the landscape structure of the territory of south the Selenga middle mountains. The introduction to the article defines the concepts of landscape structure, factor-dynamic system, and reveals the essence of the structural-dynamic approach to the study of geosystems. The section \"Object and methods of research\" describes the natural conditions of the south of the Selenga middle mountains and methods of landscape research. The results of the study present an analysis of the main landscape-forming processes, factor-dynamic series, and dynamic categories of geosystems, as well as a map of the landscape structure of the study area. A structural-dynamic (factor-dynamic) approach to the analysis of landscape structure was implemented using GIS technologies based on remote sensing data, field research materials, maps of various contents and literary information. The leading landscape-forming processes and the main factors that influence the formation of the landscape structure are shown. As a result of the conducted research, a landscape map of geosystems of the topological hierarchical level was constructed, which shows the types of geosystems (geomes, classes and groups of facies) reflecting the factor-dynamic structure of landscapes. For the mountains of the south of the Selenga Middle Mountains, the leading landscape-forming processes are gravity-slope, slope water-erosion, fluvial and aeolian processes that determine the formation of lithomorphic, alluvial-hydrolithomorphic and psammo-lithomorphic factorial-dynamic series of geosystems (facies classes). For plains, the leading landscape-forming processes are slope water-erosion, alluvial, lacustrine and aeolian, forming lithomorphic, alluvial-hydromorphic and psammomorphic series of facies.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115994899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Features of Renewable Energy Development in the Republic of Buryatia and Mongolia","authors":"A. Badmaev, V. Batomunkuev","doi":"10.26516/2073-3402.2022.41.21","DOIUrl":"https://doi.org/10.26516/2073-3402.2022.41.21","url":null,"abstract":"Every year, humanity is increasingly faced with a shortage of electricity on the one hand, and with an increase in greenhouse gas emissions after the generation of electricity at thermal power plants (TPPs), on the other. Energy is the dominant driver of climate change and accounts for about 60 percent of total global greenhouse gas emissions. The article is devoted to the analysis of renewable energy development in the Republic of Buryatia and Mongolia over the past 10 years. The constantly growing demand for electricity and relatively small energy capacities are forcing the Republic of Buryatia (to a greater extent) and Mongolia, which are limited in some types of economic activity, to look for new sources of energy. One of these restrictions is the ban on the construction of hydroelectric power plants on the rivers of the Baikal Lake basin. Therefore, Buryatia and Mongolia have embarked on the path of building environmentally friendly power plants and have succeeded in many ways. In last years, in connection with the UN Sustainable Development Goals on the development of infrastructure for the provision of affordable and clean energy (Goal 7), there has been a need to develop renewable energy sources. One of the priority areas for the development of renewable, including alternative, energy in Buryatia and Mongolia is solar, wind, hydro and geothermal energy. UN Sustainable Development Goal 7 aims to ensure universal access to affordable, reliable, sustainable, and modern energy for all. As part of the implementation of the UN Sustainable Development Goal 7, solar and wind power plants have been actively built in Buryatia and Mongolia over the past 10 years. Despite the high costs of their creation, the contribution to alternative energy is a long-term and profitable investment in infrastructure. At least investors (including foreign ones) investing in a seemingly lowprofit project look far into the future. Smart investors do not run after «quick money», realizing that the constructed power plants will pay off for a long time, since at the moment of development they have a relatively low efficiency. Despite the criticism, they are investing in green energy, modern infrastructure, and a future without emissions (CO2, NO2, SO2 and other Greenhouse gases) from burning coal, fuel oil and firewood. For the qualitative development of the economy, it is necessary, first of all, a balanced development of generating and network capacities, therefore, it is possible to solve the problem of shortage of electricity without a heavy burden on the environment only by developing alternative energy (renewable energy sources).","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Radon Flux Density is 222 in the Soils of the Tobolsk District of the Tyumen Region","authors":"A. P. Kolobov","doi":"10.26516/2073-3402.2022.39.56","DOIUrl":"https://doi.org/10.26516/2073-3402.2022.39.56","url":null,"abstract":"The aim of the work is to determine potentially radon dangerous areas for the local population on the territory of Kondinskaya lowland within the boundaries of Tobolsk district of Tyumen region with the help of radon monitoring complex “CAMERA-01”. The density of the radon-222 flux was defined at the soil depth from 0 to 100 cm in 10 plots. The plots are located on the low above floodplain terrace, in the levee and central floodplains of the Irtysh River and a tributary of the Tobol River – the Suklyomka River. The highest average value of radon-222 exhalation from the soil surface was found in the vicinity of Makedonova village – 39 mBq/(m2·s), in the rest of the tested soil plots it was not more than 18 mBq/(m2·s). The received data on density of radon-222 flux from the surface of soils of the investigated plots make it possible to say that they do not refer to potentially radon-hazardous. At the same time it is found that the territories around the village Usharovo, the village of Makedonova and settlement Savinsky Zaton (floodplain terraces of the Irtysh River) at a depth of 40 to 100 cm have average values of the flux density of natural radionuclide exceeding 200 mBq/(m2·s). Only in soils of the floodplain terrace of the river Suklyomka – a tributary of the Tobol river the radon– 222 flux density below 80 mBq/(m2 s) – I class of radon-hazard was fixed at the whole investigated depth. The highest average density of the radon–222 flow (1200 mBq/(m2·s)) at the depth of 100 cm was found in the vicinity of the settlement Savinsky Zaton, probably associated with the transfer of radon-222 from groundwater of the liquidated well, near which the sampling of radon-222 was made.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129523716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Territorial Differentiation of the Population Demographic Structure of Siberian Regions","authors":"Yu.N. Dmitrieva","doi":"10.26516/2073-3402.2023.44.44","DOIUrl":"https://doi.org/10.26516/2073-3402.2023.44.44","url":null,"abstract":"The purpose of the work is to identify the features and factors of the formation of territorial differentiation of demographic structures of the population of the Siberian macroregion. The article analyzes the dynamics of the total population in the regions of Siberia over a twenty-year period. The author presents absolute and relative indicators of population growth and decline in the regional context. Significant territorial disparities in the number and proportions of three population groups were revealed: younger than working age, able-bodied and older than working age in the context of regions. The author constructed and analyzed the features of regional sex and age pyramids. The factors of territorial differentiation of demographic structures were general socio-demographic processes characteristic of Russian society as a whole, and regional demographic features: the migration attractiveness of regions with extractive industries, the aging of the population as a result of natural and migration decline, higher birth rates in the national republics of Siberia. The paper identifies and maps three main types of demographic structures of the population: progressive, stationary, regressive. It has been established that in the Siberian macroregion, over a twenty-year period, the progressive type of age structure in terms of working capacity has been replaced by a stationary type. The study focuses on the fact that in the general population structure in territories with a progressive type of demographic structure in 2021, 20 % of the population lived, with a stationary type of 35 %, with a regressive type of 45 % of the inhabitants of Siberia. Thus, the structure of the population of Siberia in terms of working capacity is more favorable in terms of the development of socio-demographic and economic potential than the average in Russia, where 7 % of the total population structure of residents live in territories with a progressive type of demographic structure.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128304699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transport Factor in the Suburbanization Processes of the Irkutsk Agglomeration","authors":"E. Serebrennikov","doi":"10.26516/2073-3402.2023.43.91","DOIUrl":"https://doi.org/10.26516/2073-3402.2023.43.91","url":null,"abstract":"The paper deals with the problems of the Irkutsk agglomeration associated with the increasing role of personal motor transport in the interaction of the city with suburban settlements. The study area includes a number of suburban municipalities most involved in the agglomeration process. The dynamics of the growth of personal vehicles in the context of municipalities is considered. Measurements of the intensity of traffic on the main highways leaving the city, and the ratio of personal and public transport, providing communication within the agglomeration, were carried out. The most intensively developing suburban settlements and the busiest highways - Kultuksky and Baikalsky, connecting the city with the nearest settlements on the coast of Lake Baikal and the waters of the Angara bays, along which there is an increase in cottage and garden-dacha construction, have been identified. At the same time, the share of public transport in the structure of flows is directly proportional to its intensity, which contributes to congestion and traffic jams at the exits from the city. The factors and reasons influencing the development of different areas of suburban areas are considered. Based on the results of the analysis, recommendations are given for optimizing the transport network in order to minimize existing problems and further systematic development of the agglomeration.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124566158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal Compositional Variations of Cenozoic Sediments on the Tankhoi Tectonic Step, the Southern Baikal","authors":"Ahmed Al Hamoud, S. Rasskazov, I. Chuvashova, T. Tregub, M. Volkov, N. Kulagina, V. Kolomiets, R. Budaev","doi":"10.26516/2073-3402.2019.30.108","DOIUrl":"https://doi.org/10.26516/2073-3402.2019.30.108","url":null,"abstract":"","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129234880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Circulation Factors of Fires in Siberia and the Far East in the Summer of 2019 and 2021","authors":"I. Latysheva, S. Vologzhina, K. Loshchenko","doi":"10.26516/2073-3402.2021.38.54","DOIUrl":"https://doi.org/10.26516/2073-3402.2021.38.54","url":null,"abstract":"The article is devoted to the analysis of forest fires in Siberia. Particular attention is paid to three regions: Krasnoyarsk Territory, Irkutsk Region and the Republic of Yakutia. The causes of forest fires, weather and circulation conditions were analyzed as key natural factors of a high level of fire hazard in the boreal forests of the northern regions of the Asian part of Russia using the example of the territories of the Krasnoyarsk Territory, Irkutsk Region and Yakutia. The typification of synoptic processes in the middle and lower troposphere is carried out, reflecting the prevailing contribution of blocking and mobile cyclogenesis processes to an increase in the area of distribution and the lifetime of forest fires. The long-term dynamics of temperature and humidity characteristics was estimated through the calculated values of the hydrothermal coefficient, which indicate a tendency to an increase in the probabilistic criteria of “insufficient moisture”, and in some years of weak droughts, which should be taken into account when predicting forest fires in the boreal forests of Siberia and Yakutia. A comparative analysis of the advective-dynamic factors of the occurrence of forest fires was carried out using the example of large forest fires in Siberia, starting from 1897. Particular attention is paid to the causes of the occurrence of large forest fires in the summer of 2019 and 2021.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"80 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120895247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Features of Spatial Transformation Agglomerations (on the Example Irkutsk and Ulaanbaatar)","authors":"G. Dugarova, V. Bogdanov","doi":"10.26516/2073-3402.2022.40.14","DOIUrl":"https://doi.org/10.26516/2073-3402.2022.40.14","url":null,"abstract":"This publication is about the study of urban agglomerations (Irkutsk and Ulaanbaatar). The purpose of this work was, on the one side, to study the features of the transformation of urban spaces based on a comprehensive comparative geographical analysis, and on the other side, to generalize and structure the previously obtained results, as the promotion of scientific ideology. In the during of the study, geoinformation mapping methods were widely used, which provide great opportunities for detecting spatial changes. As a result of the study, based on a comparative geographical analysis of urban agglomerations, both common similar features and problems, as well as specific features that have a significant impact on the transformation of the urban environment, have been identified. Other things being equal, the metropolitan agglomeration has financial, social, economic, logistical op- portunities than the regional one, as a result of which they have different rates and ways of further development. The comparative analysis carried out and the results obtained will be useful and interesting for finding new ways, algorithms for solving common problems.","PeriodicalId":147615,"journal":{"name":"The Bulletin of Irkutsk State University. Series Earth Sciences","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125672252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}