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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
Количество страниц: 11 с.
The Gross mining and processing plant under reconstruction is located in southwestern Yakutia, within a territory classified as earthquake-prone. According to the OSR 2015 map with indices A, B, C, the seismicity of the construction area is 9, 9 and 10 points MSK-64 scale, respectively. Despite significant research experience in clarifying the general seismic zoning, the issues of interpreting the source materials, as well as the results obtained, may be ambiguous. In confirmation of this, it can be noted that over the past 25 years four generations of general seismic zoning maps (OSR 97, OSR 2012, OSR 2015, OSR 2016) followed one another. The relevance of research is determined not only by the seismic safety of construction projects, but also by their economic component. Thus, 1-point seismic hazard increase entails 13% to 20% construction cost increase. The aim of the research is to specify the level of baseline seismicity for survey areas using the methodology of probabilistic seismic hazard analysis with respect to the regional seismotectonic conditions of the Gross mining and processing plant construction area. As a result of the analysis of materials from geodynamic active neotectonic zones, the presence of active structures capable of generating earthquakes with magnitudes М = 6.5 - 7.0 was established. A probabilistic assessment of the parameters of seismic impacts was carried out: macroseismic intensity (in MSK-64 points), peak accelerations and response spectra, for the case of earthquakes of the maximum possible magnitude Mmax, at the minimum possible distance R from the study area of the projected construction of objects, was carried out using the EAST-2016 software. The specified level of seismic hazard for return periods of 500, 1000 and 5000 years are I = 8, I = 8.3 and 9.1 points MSK-64 scale, respectively.
Гриб, Н. Н.
Уточнение нормативной сейсмичности на участке инженерно-геологических изысканий "Горно-обогатительный комбинат "Гросс" / Н. Н. Гриб, И. И. Колодезников, Г. В. Гриб ; Технический институт (ф) СВФУ им. М. К. Аммосова, Тихоокеанский государственный университет, Академия наук Республики Саха (Якутия) // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Науки о Земле" - 2024. - N 3 (35). - C. 18-28. - DOI: 10.25587/2587-8751-2024-3-18-28
DOI: 10.25587/2587-8751-2024-3-18-28
Год выпуска: 2025
Количество страниц: 15 с.
The moss-biomonitor method was used for the first time to estimate the areal of precipitation extent of heavy metals and other trace elements (Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, P, Pb, S, Sr, Sb, V, Zn and Hg) in the territory surrounding the landfill of domestic (communal) waste on the 9th km of the Vilyuisky tract in Yakutsk within a radius of 150 km, using the method of optical emission spectrometry with inductively coupled plasma. At the same time, mosses, lichens and soil were analysed for the content of radionuclides (40К, 137Cs, 212 Pb, 214Pb, 212Bi, 214Bi, 208Tl, 7Be, 228Ac) in a number of samples taken by semiconductor gamma spectrometry. The results of the study of moss samples by optical emission spectrometry with inductively coupled plasma indicate the presence of a large amount of toxic paper (Ba) and metal debris (Al, Co, Cr, Fe, S, Pb) in the landfill. In addition, it was shown that the following elements were found in the studied samples: Cd, Co, Cr, Cu, Mn, Ni, Pb, Sr, V, Zn, Hg. Gamma-ray spectrometry revealed that radioactive elements such as caesium 137Cs, daughter products of uranium 238U and thorium 232Th are present in the studied samples. Detection of the same heavy metals and radionuclides in the atmospheric environment and town soil (data from the scientific and technical report “Origin and composition of dust on the territory of the Municipal Entity of Yakutsk”), as well as in vegetation and soil near the landfill (data presented in this paper) may indicate that one of the sources of environmental contamination may be the products of combustion resulting of the landfill contents at the 9th km of the Vilyuisky tract.
Оценка ареала выпадения тяжелых металлов и радионуклидов на окружающую среду полигона бытовых отходов на 9-м км Вилюйского тракта в г. Якутске / С. Н. Мамаева, М. В. Фронтасьева, К. А. Петрова, В. Е. Колодезников [и др.] ; Cеверо-Восточный федеральный университет им. М. К. Аммосова, Объединенный институт ядерных исследований // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 7-21. - DOI: 10.25587/2222-5404-2024-21-4-7-21
DOI: 10.25587/2222-5404-2024-21-4-7-21