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Количество страниц: 12 с.
A limited number of scientific publications are devoted to the analysis of small mammal communities in North-East Yakutia, which does not allow us to estimate their previous abundance and distribution across biotopes in the upper reaches of the Indigirka River. Research on this topic in 2023 made it possible to obtain new, unique data on the state and abundance of game species and small mammals in the Oymyakon ulus (district) of the Republic of Sakha (Yakutia) in valley biotopes. The purpose of the work was to determine the biodiversity of mammals in the floodplain lands of the upper reaches of the Indigirka River. Research in the Oymyakon ulus (district) of the Republic of Sakha (Yakutia) was carried out in March-July 2023 in lands adjacent to one of the depleted gold deposits on the Bolshoy Taryn River, which is a right tributary of the Indigirka River. According to literary sources, 17 game species of mammals live in the study area. In 2023, three routes with a total length of 19.4 km were completed, on which traces of eight species were recorded. In the process of analyzing the trace activity of wild animals registered during the winter route surveys, it was found that traces of small animals (squirrel, ermine, Arctic hare, fox) were found in the immediate vicinity of the infrastructure facilities of the developed deposits. Traces of large, more anthropomorphic animals (elk, wild reindeer) and sable were recorded at some distance from industrial facilities. It was shown that the current population density of game species living in the floodplain of the Bolshoy Taryn River is within the limits of the official data of the Hunting Department of the Ministry of Ecology of the Republic of Sakha (Yakutia) for the Oymyakon ulus (district). This indicates the absence of a significant impact of industrial facilities on game species. To assess the biodiversity of small mammals using standard methods, 40 specimens were captured. During the capture period, 600 trap-days and 72 cone-days were processed. The Shannon diversity index for the small mammal community was 1.262. This shows the low biodiversity of small mammal species from the Insectivora and Rodents orders, which is explained by the peculiarities of the natural conditions of the area. The second reason for the small number of captured species, compared with those caught earlier in the middle reaches of the Indigirka River, is the fact that the capture of small mammals was carried out almost only in the valley of the Bolshoy Taryn River.
Анализ биоразнообразия млекопитающих долины верхнего течения реки Индигирки / В. Г. Монахов, А. Н. Горохов, В. В. Величенко, В. А. Данилов // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 22-33. - DOI: 10.25587/2222-5404-2024-21-4-22-33
DOI: 10.25587/2222-5404-2024-21-4-22-33
Количество страниц: 1 с.
Количество страниц: 11 с.
The study deals with the history of exploration of the subsoil resources of the Sakha Republic (Yakutia), its huge and diverse geological and mineralogical potential. The authors analyse the existing museums devoted to geology and mineralogy, and put forward the idea of the necessity to create a large museum reflecting the history of geological exploration and development of mineral resources in the republic. The urgent need to create a mining and geological museum in Yakutsk, reflecting the history of geological exploration and development of mineral resources in the republic is emphasised. The concept of the museum as a powerful centre of scientific and educational education and a space of cultural exchange of society, based on axiological basis, is defined. Its mission as propaganda and popularisation of knowledge about the Earth, preservation of unique geological fund of the republic, orientation and self-identification of the person in the world of values is characterized.
Аксиологические основания создания горно-геологического музея Республики Саха (Якутия) / О. Г. Третьякова, А. В. Сычевский, В. Ф. Попов [и др.] ; Северо-Восточный федеральный университет им. М. К. Аммосова, Министерство промышленности и геологии РС (Я), Национальный исследовательский Томский государственный университет, Институт агробиотехнологии РГАУ-МСХА имени К. А. Тимирязева // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле". - 2024. - N 4 (36). - С. 72-82. - DOI: 10.25587/2587-8751-2024-4-72-82
DOI: 10.25587/2587-8751-2024-4-72-82
Количество страниц: 14 с.
Brief results of geological exploration for oil and gas within the Lena-Anabar trough and Anabar-Khatanga saddle are presented. The extremely low and uneven level of geological and geophysical study of the territories under consideration and the need to study the Middle Paleozoic complex of sediments are noted. Based on the published and archive information, a brief overview of lithological and stratigraphic descriptions of sections and features of the geological structure of the Middle Paleozoic deposits of the studied territory is made. A paleogeographic diagram of the Middle Paleozoic rift complex of the Laptev plate and the adjacent territory were constructed. The data indicating the oil-source properties of the Devonian deposits within the Anabar-Khatanga saddle are presented. On the basis of geological and geophysical data, an assumption is made about the presence of saliferous deposits in the section of the Kyutyungda graben. The possibility of realizing the oil-source potential of the Vendean-Cambrian deposits in the lower part of the section of the Kyutyungda graben is indicated. The prospects of oil and gas content of the southern part of the Laptev Sea shelf related to the Middle Paleozoic deposits are predicted.
Среднепалеозойские отложения северо-востока Сибирской платформы: особенности геологического строения и перспективы нефтегазоносности / А. И. Сивцев, А. И. Калинин, Н. А. Сивцев ; Северо-Восточный федеральный университет им. М. К. Аммосова, Институт проблем нефти и газа СОРАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле". - 2024. - N 4 (36). - С. 49-62. - DOI: 10.25587/2587-8751-2024-4-63-71
DOI: 10.25587/2587-8751-2024-4-49-62
Количество страниц: 16 с.
As a result of a thorough analysis of geophysics data and deep drilling, it was established that the most likely zones for the discovery of new oil and gas reserves are localized in the north and center of the Pre-Verkhoyansk trough, as well as in the southeastern part of the Siberian platform along the Aldan-Maya trough. The high content of hydrocarbons in the formation waters of productive layers indicates large-scale processes of gas formation and active vertical and horizontal migration, which contributes to the creation of a favorable environment for the formation of free gas. Particular attention is drawn to deposits in Jurassic deposits, formed due to the secondary capture of gas ows during intense vertical and inter-reservoir movement. The key reservoirs for future discoveries are the sandy-clayey Permian deposits under the clayey strata of the Lower Triassic Nedzhelin Formation. Most proven gas reserves are associated with large, high-amputation swell-like uplifts. Modern geological structures and the hydrodynamic potential of the region determine optimal conditions for the migration of hydrocarbons. It is proposed to designate the Kitchanskaya, Yakutskaya and Munskaya zones of expected oil and gas accumulation as priority objects in the central part of the Pre-Verkhoyansk trough and adjacent territories of the Vilyui syneclise. The article examines the oil and gas potential prospects of the Aldan-Maya trough. Here, buried landforms play a key role in geological structures and determine the prospects for the generation and migration routes of hydrocarbons, in the structure of lithological-stratigraphic traps. The industrial signi cance of deposits contained in Riphean sediments has been con rmed in adjacent territories, in particular within the Berezovskaya depression.
Перспективы нефтегазоносных территорий восточного обрамления Сибирской платформы по материалам геологоразведочных работ последних лет / А. В. Погодаев, Р. Ф. Севостьянова, М. И. Слепцова [и др.] // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - N 4 (36). - С. 33-48. - DOI: 10.25587/2587-8751-2024-4-33-48
DOI: 10.25587/2587-8751-2024-4-33-48
Количество страниц: 22 с.
The article considers the features of the petrographic and geochemical compositions of the Mesozoic igneous rocks of the Polovinkinskaya depression from earth bores K1, K2, K3, located within the central part of the Aldan-Stanovoy shield, on the boundary of the Tynda and Nimnyr terranes within the Amginskaya zone of tectonic mélange. Based on the relationship of rocks, as well as on the features of the petrographic composition, the following sequence of introduction and formation is assumed: 1) gabbro; 2) hornblende-augite andesites. This is confirmed by the values and variations of the petrochemical composition. According to the petrochemical and geochemical characteristics, gabbros are close to the tholeiitic series. Andesites belong to the calc-alkaline petrochemical series, latites of the shoshonite type. The presence of such rocks as gabbro and andesites is typical for mature island arcs and active continental margins, which does not contradict the existing ideas of predecessors. Similar in geological structure objects are gold-producing gabbro-tonalite-granodiorite-granite (GTGG) massifs of the Urals, which are supra-subduction formations on the active continental margin of the Andean type. The presence of rocks of the GTGG formation within the Polovinkinskaya depression serves as a favorable factor for noble-metal ore-generating processes.
Петрографический и петро-геохимический составы мезозойских (?) магматических пород Половинкинской впадины (Алдано-Становой щит) / А. И. Иванов, Е. Е. Лоскутов, А. И. Журавлев [и др.] ; Институт геологии алмаза и благородных металлов СО РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 4 (36). - С. 11-32. - DOI: 10.25587/2587-8751-2024-4-11-32
DOI: 10.25587/2587-8751-2024-4-11-32
Количество страниц: 6 с.
In this article, we propose a way to replace test pits in the exploration of placer deposits of the cryolithozone. The idea is to take an additional volume of samples from a pre-drilled exploration well by expanding its trunk in a given interval using a specially designed and patented device for local expansion of the borehole section (Patent for Invention N 2792482 dated November 15, 2022). Thus, by using a drilling expander, it is possible to obtain an additional volume of samples from the well, while the well expansion is performed only in a certain area of the well. If the diameter of the well expansion is 1300 mm or more, then using an expander will allow extracting from a given well interval the same volume of samples that is obtained during the construction of a test pit. This method will make it possible to replace construction of a test pit in the exploration of placer deposits of the cryolithozone, which are characterized by a high proportion of manual labor and require significant financial resources and time.
Применение бурового расширителя для забора дополнительного объема проб с пробуренной скважины при разведке россыпных месторождений криолитозоны / И. А. Егоров, Д. М. Татаринов, А. Д. Набережный, А. А. Находкин ; Северо-Восточный федеральный университет им. М. К. Аммосова, Институт мерзлотоведения им. П. И. Мельникова СО РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 4 (36). - С. 5-10. - DOI: 10.25587/2587-8751-2024-4-5-10
DOI: 10.25587/2587-8751-2024-4-5-10
Количество страниц: 14 с.
The article considers the distribution of unique lakes in the territory of Yakutia. The Republic of Sakha (Yakutia) is one of the most lake regions in Russia. Since 1978, the Laboratory of Lake Science of the Yakut State University, later North-Eastern Federal University, has been engaged in scientific research of the lakes of Yakutia for many years under the scienti c supervision of the famous geographer-limnologist, Ph.D., Professor I. I. Zhirkov, which is known among lake scientists of Russia and the world as the Yakut school of Limnology. As a result, a landscape-limnogenetic classification of lakes by types of basin origin was compiled, hydrological and morphometric parameters were identified, lake resources were determined, including “unique lakes”. Unique lakes are a group of specially protected lakes that represent great economic, social and aesthetic value for current and future generations. The list of 26 unique lakes was determined by Decree of the President of the RS (Ya) dated 08/16/2004 N 836. The unique lakes of Yakutia are mainly considered in the ecological aspect as specially protected natural objects. The relevance of this article lies in the geographical approach to identify the uniqueness, natural features of the unique lakes of Yakutia. A comprehensive geographical description provides a general physical and geographical characteristic of each unique lake, depending on its geographical location, natural features, accessibility, natural and economic significance for the economy, population, conservation status, etc. The landscape approach to the spatial analysis of the distribution of lakes was reflected in the consideration of the distribution of unique lakes across the physico-geographical provinces of Yakutia.
Пахомова, Л. С.
Распространение уникальных озер на территории Якутии / Л. С. Пахомова ; Северо-Восточный федеральный университет им. М. К. Аммосова // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 3 (35). - C. 60-73. - DOI: 10.25587/2587-8751-2024-3-60-73
DOI: 10.25587/2587-8751-2024-3-60-73
Количество страниц: 9 с.
- Краеведение. Археология. География. Биографии. История > Общие вопросы. География как наука. Географические исследования,
- Математика. Естественные науки > Общая геология . Метеорология. Климатология. Историческая геология. Стратиграфия. Палеогеография,
- НАУКА ЯКУТИИ > КРАЕВЕДЕНИЕ. ГЕОГРАФИЯ. БИОГРАФИИ. ИСТОРИЯ > Общие вопросы. География как наука. Географические исследования,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Общая биология. Антропология. Вирусология. Микробиология.
The article provides an assessment of the stability of permafrost landscapes by two criteria: temperature and ice content of ground. The methods of assessing the stability of landscapes are presented: the Parmuzin scale, developed by him during the zoning of the north of Western Siberia by the potential possibility of thermokarst development and the Grave principle, on the basis of which a map scheme of the Yakut ASSR was previously compiled by the degree of surface sensitivity to technogenic impacts. Using the two presented methods of Parmuzin and Grave, based on the Permafrost-landscape map of the Republic of Sakha (Yakutia) on a scale of 1: 1,500,000, as well as maps of ground temperature of the Republic of Sakha (Yakutia) at the depth of the layer of annual fluctuations and ice content of surface deposits, landscape stability maps were compiled, the territory of Yakutia was divided into zones according to the degree of resistance to technogenic impacts. On the map compiled according to the Parmuzin method, landscapes according to the degree of resistance to technogenic impacts are differentiated into four gradations: unstable, relatively unstable, relatively stable and stable. Thus, according to this method, unstable landscapes occupy the smallest area of the study territory and are distributed mainly in the region with insular and discontinuous distribution of permafrost. Landscapes of the Central Yakut Plain, Prilenskoye Plateau and other lowlands with continuous permafrost distribution are characterized as relatively unstable. Relatively stable landscapes occupy the predominant part of Yakutia. Landscapes of mountainous regions are characterized as stable. According to the Grave method, landscapes on the map are divided into three gradations: relatively unstable, relatively stable and stable. According to the above-mentioned method, the territory of Central Yakutia, located in the area of highly icy soils and coastal arctic zones, is characterized as relatively unstable. The rest of the territory is assessed as relatively stable and stable.
Калиничева, С. В.
Оценка устойчивости мерзлотных ландшафтов Восточной Сибири (на примере Якутии) / С. В. Калиничева ; Институт мерзлотоведения им. П. И. Мельникова СО РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 3 (35). - C. 51-59. - DOI: 10.25587/2587-8751-2024-3-51-59
DOI: 10.25587/2587-8751-2024-3-51-59
Количество страниц: 9 с.
The redistribution of solar radiation in the geographical envelope plays an important climate-forming role. The radiation reflected by the Earth’s surface (albedo) is a component of the Earth’s radiation balance. The albedo of the Earth’s surface depends primarily on the angle of incidence of sunlight, the color of the underlying surface, and its roughness relative to the incident rays. It also depends on the degree of specularity, so the water surface reflects the rays falling on it almost mirror-like, almost regardless of the presence of ripples or waves on it. The article examines the dependence of albedo, the surface of the soil not covered with vegetation, on these factors. Taking into account the known regression dependence of the albedo of the earth’s soil surface on the roughness index or the standard deviation of the height of the measured points on the Earth’s surface, the problem of achieving maximum information content of the measurements of the roughness of the Earth’s surface is formulated and solved, and the optimal dependence of the zenith angle of the Sun on the time interval between two consecutive time points of roughness measurements is revealed. The inlfuence of the zenith angle of the Sun on the conducted albedometric measurements is investigated. Based on the well-known fact that the albedo of the Earth’s surface in the range of the zenith angle of the Sun θ = 10° - 60° increases almost linearly depending on it. The values of the zenith angle of the Sun obtained in this way are called the most informative zenith angles in the sense of ensuring maximum informative measurement of the earth’s surface, and the albedo values corresponding to these zenith angles are the optimal albedo values at which optimal (maximally informative) roughness measurements can be carried out in the zenith angle range of 10° - 60°.
Вопросы дистанционного измерения альбедо почвы при помощи летательных аппаратов по траектории полета / А. Дж. Алиева, М. Г. Ашрафов, Ю. Г. Данилов, А. А. Мельникова ; Национальное Аэрокосмическое Агентство Азербайджана, СВФУ им. М. К. Аммосова // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 3 (35). - C. 29-37. - DOI: 10.25587/2587-8751-2024-3-29-37
DOI: 10.25587/2587-8751-2024-3-29-37