Vestnik of geosciences最新文献_第3页

Late Devonian plume Tsilemsky dyke (Middle Timan): composition and K-Ar age 晚泥盆世羽状Tsilemsky岩体（中天满）：成分和K-Ar年龄

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.4

A. Shuyskiy, K. Kulikova, Oksana Udoratina, V. Lebedev

引用次数: 0

Relative role of dynamic pressure forces and viscous stresses in tectonically active transition zones of the Earth 地球构造活跃过渡带中动态压力和粘性应力的相对作用

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.5

S. Gavrilov, A. Kharitonov

{"title":"Relative role of dynamic pressure forces and viscous stresses in tectonically active transition zones of the Earth","authors":"S. Gavrilov, A. Kharitonov","doi":"10.19110/geov.2023.12.5","DOIUrl":"https://doi.org/10.19110/geov.2023.12.5","url":null,"abstract":"This article shows the role of dynamic non–hydrostatic pressure forces and viscous stresses in asthenosphere of tectonically active transition zones from the continent to the ocean. We have studied zones of active tectonic processes in the lithosphere and the underlying mantle, affecting the lithospheric blocks, the day surface of the Earth and the boundaries of density inhomogeneities. We showed the predominant influence of viscous stresses on the formation of mantle diapers and often associated hydrocarbon deposits. In subduction zones, in which a large-scale descending convective flow descends into the upper mantle as a sinking hard lithospheric block. We studied forces that determine the angle of subduction, depending on the age of the lithosphere, the rate of subduction and the rheological properties of the mantle material. We applied the method of analytical thermodynamic modeling of the tectonic structure of the upper mantle (lithosphere, asthenosphere) in the transition zone from the continent to the ocean. We concluded that the relative role of dynamic pressure forces prevailed in zones characterized by horizontally elongated asthenospheric movements in the mantle, as it happened under extended oceanic lithospheric plates. The novelty of the research is connected with the conclusion that under lithospheric micro-plates and near their boundaries, the roles of dynamic pressure forces and viscous stresses are comparable. In the areas of thermal diapirs associated with subduction zones and often located in transition zones from the continent to the ocean, the role of viscous stresses prevails. Thermal diapirs in subduction zones sometimes lead to the formation of hydrocarbon deposits due to mantle degassing processes.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"243 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443429","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}

引用次数: 0

Stromatolites in the Upper Visean sediments of the Pacha-Lasta section (Ilych River, Northern Urals) 帕恰-拉斯塔河段（乌拉尔北部伊里奇河）上维谢安沉积物中的叠层石

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.2

A. Shadrin, R. Ivanova, E. Ponomarenko

{"title":"Stromatolites in the Upper Visean sediments of the Pacha-Lasta section (Ilych River, Northern Urals)","authors":"A. Shadrin, R. Ivanova, E. Ponomarenko","doi":"10.19110/geov.2023.12.2","DOIUrl":"https://doi.org/10.19110/geov.2023.12.2","url":null,"abstract":"The object of the study is the carbonate section «Pacha-Lasta» (Ilych river, Northern Urals). The work is based on the study of the composition, structure of rocks and species diversity of the foraminifera contained in them. The rocks are represented by various limestones with numerous remains of foraminifera, brachiopods, corals, echinoderms, frequent calcispheres and rare stromatolites. Based on the presence in the complex of certain foraminifera genera Biseriella, Globivalvulina, various Eostaffella (including E. ikensis tenebrosa) as well as the species Endothyranopsis sphaerica and Asteroarchaediscus baschkiricus, the Venusian age of the deposits is reliably established. Stromatolite formations, which are not characteristic of the same-age deposits of the area, were established at two intervals of the studied section. They are composed of micritized colonies of cyanobacteria, among which Ortonella and Girvanella are identified. These formations belong to the type of skeletal stromatolites, which in the Silurian and Late Devonian had a certain paleogeographic position and fixed the margin of the carbonate platform. For the Ilych River basin, a consistent decrease in relative sea level is assumed after the Early Visean transgression with a change in the conditions of the open sublittoral (Tula and Aleksinsky horizons) to the conditions of insular shallow water (Mikhailovsky and Venevsky horizons). In the latter, stromatolites can sometines occur, which are not characteristic of the Upper Visean deposits of the area.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"149 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443841","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}

引用次数: 0

A new location of stromatolites in the Middle Timan: their morphological and structural features 中提曼岛叠层石的新位置：其形态和结构特征

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.3

E. Antropova

引用次数: 0

Formations of the Carboniferous-Lower Permian carbonate deposits of the Upper Pechora basin (Northern Urals) 上佩乔拉盆地（北乌拉尔）石炭纪-下二叠纪碳酸盐沉积地层

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.1

A. Sandula

{"title":"Formations of the Carboniferous-Lower Permian carbonate deposits of the Upper Pechora basin (Northern Urals)","authors":"A. Sandula","doi":"10.19110/geov.2023.12.1","DOIUrl":"https://doi.org/10.19110/geov.2023.12.1","url":null,"abstract":"The Upper Pechora basin is part of the northeastrn margin of the European Platform. In the Paleozoic, it was located within the carbonate shelf of the passive continental margin. According to A. I. Eliseev, Visean terrrigenous-carbonate (platamovy type) and Upper Visean-Lower Artinskian carbonate (kaleydovy type) formations occupy the upper part of the final sedimentation cycle of the formations row. According to new data, the history of the geological development of the Upper Pechora basin of the Late Visean-Asselian period has significant differences. Four types can be distinguished in the structure of sediments according to the composition of rocks: siliceous-clay-limestone, limestone, dolomite-limestone, siliceous-limestone. They were formed during three stages respective to the time of formation of three transgressive-regressive cyclites: the Visean-Serpukhovian, Bashkirian-Moscovian, Upper Carboniferous-Lower Permian. The studied deposits are divided into lithological complexes: siliceous-clay-carbonate of open sea (Tulian), siliceous-carbonate of open sea (Aleksinian-Early Mikhailovian, Bashkirian-Early Moscovian, Kasimovian-Midle Gzhelian), carbonate of shallow-shallow (Late Mikhailovian-Protvinian, Moscovian), and also the Late Gzhelian-Asselian shallow-depression (siliceous-limestone, limestone, clay-limestone). Lithological complexes, formed in open-sea conditions, belong to formations from the platamovy type and in shallow-shallow conditions — to formations from the kaleidovy type (by Eliseev, 2008).","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"72 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445256","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}

引用次数: 0

Geological and geomorphological zoning of the Seyda river basin (east of the Bolshezemelskaya tundra) based on the ArcticDEM digital elevation model 基于 ArcticDEM 数字高程模型的塞伊达河流域（博尔谢泽梅尔斯卡亚苔原以东）地质和地貌区划

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.5

V. Isakov

{"title":"Geological and geomorphological zoning of the Seyda river basin (east of the Bolshezemelskaya tundra) based on the ArcticDEM digital elevation model","authors":"V. Isakov","doi":"10.19110/geov.2023.10.5","DOIUrl":"https://doi.org/10.19110/geov.2023.10.5","url":null,"abstract":"The Bolshezemelskaya tundra is one of the least studied and poorly mapped territories of the European North-East of Russia. The availability of the ArcticDEM digital elevation model with a high spatial resolution allowed conducting a comprehensive joint analysis of digital, geomorphological and geological data. \u0000The results of using the ArcticDEM global digital relief model for geological and geomorphological studies of the Seyda River basin (eastern Bolshezemelskaya tundra) in its middle and lower reaches are presented. \u0000An irregular triangulation network TIN covering the Seyda River valley was constructed, and the main geomorphometric parameters of the relief were calculated: hypsometric characteristics, surface inclination angles and slope exposures. Based on the obtained morphometric indicators of the relief and the textural and structural characteristics of Quaternary sediments, the following types of relief were identified: accumulative glacial, erosion-accumulative water-glacial and erosion-accumulative alluvial types of relief. A geological and geomorphological diagram of the Seyda River valley was been constructed and the main morphogenetic features of the relief during its formation were identified.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"6 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138586584","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}

引用次数: 0

Formation of hydrocarbon gases in Domanik shale during hydrous pyrolysis 多曼尼克页岩在水合热解过程中形成的碳氢化合物气体

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.4

Dmitry Bushnev, N. Burdelnaya, A. Ilchenko, Ya. D. Sennikova

引用次数: 0

Structural features of Precambrian formations of Subpolar and Polar Urals: comparative analysis 亚极地和极地乌拉尔地区前寒武纪地层的结构特征：比较分析

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.1

I. Potapov, K. Popvasev, A. Pystin

引用次数: 0

Two episodes of subduction-related intrusive magmatism within the Pechora zone of the Pechora Basin basement 佩乔拉盆地基底佩乔拉区内两次与俯冲有关的侵入岩浆活动

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.2

V. Andreichev, Anna Soboleva, E. Dovzhikova, Y. Ronkin

{"title":"Two episodes of subduction-related intrusive magmatism within the Pechora zone of the Pechora Basin basement","authors":"V. Andreichev, Anna Soboleva, E. Dovzhikova, Y. Ronkin","doi":"10.19110/geov.2023.10.2","DOIUrl":"https://doi.org/10.19110/geov.2023.10.2","url":null,"abstract":"The Pechora Basin is the largest tectonic structure of the Pechora Plate. It is located between the Timan and the Cis-Ural Foredeep. The Upper Precambrian sedimentary-metamorphic and igneous rocks of the basement are completely overlain by a sedimentary cover, therefore, the geological structure of the basement is known only on the basis of geophysical data and core samples from boreholes up to 5 km deep. The basement has a heterogeneous structure. It includes complexes of the Late Precambrian passive margin of the East European continent, which compose the Timan megablock (Izhma zone with Timan adjoining from the southwest) and formations formed in an active margin geodynamic setting combined into the Bolshezemel megablock (Pechora and Bolshezemel zones). The boundary between megablocks is the Pripechora fault (suture) zone. The age of igneous rocks of the basement is debatable; therefore, U-Pb (SIMS) studies of single zircon grains are undertaken to specify it. The article presents petrogeochemical data and U-Pb (SIMS, SHRIMP-RG) ages of zircon grains from plutonic rocks of the Pechora zone belonging to the Bolshezemel megablock drilled by two boreholes at depths of ~ 4.5 km. The obtained results indicated two episodes of island-arc magmatism. The first took place at the end of the Riphean, and the second was confined to the Early–Late Vendian boundary. The age of gabbrodiorites from the 1-Severny Savinobor borehole, interpreted as early island-arc rocks, is 673 ± 7 Ma. Late island-arc plagiogranites from the 1-Novaya borehole yield the age of 564 ± 5 Ma and precede the orogenic granitoids of the Pripechora fault zone which are dated (U-Pb) to 555—544 Ma.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"57 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138587100","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}

引用次数: 0

Specific spatial distribution of 137Cs, 40K, 226Ra, 232Th in soils of the city of Polyarnyye Zori (Murmansk region) 波利亚尼耶佐里市（摩尔曼斯克州）土壤中 137Cs、40K、226Ra 和 232Th 的具体空间分布情况

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.6

S. Iglovsky, A. Bazhenov, E. Yakovlev

{"title":"Specific spatial distribution of 137Cs, 40K, 226Ra, 232Th in soils of the city of Polyarnyye Zori (Murmansk region)","authors":"S. Iglovsky, A. Bazhenov, E. Yakovlev","doi":"10.19110/geov.2023.10.6","DOIUrl":"https://doi.org/10.19110/geov.2023.10.6","url":null,"abstract":"The article examines patterns of spatial distribution of 137Cs and natural radionuclides 226Ra, 232Th, 40K in the upper (0—5 cm) layer of soils in the main functional zones of the city of Polyarnye Zori. The analysis of the general gamma activity of the territory, using RS-700 mobile gamma spectrometric complex, showed, three local anomalies of increased gamma radiation, which were confined to high-rise buildings within the city. In undisturbed peat soils in the area of the Kola Nuclear Power Plant and in the area of urban forests and parks, the maximum specific activity of technogenic 137Cs was 29.5 and 28.8 Bq/kg, respectively. In other functional zones of the city, the activity of 137Cs was 5 times less. According to the results of the correlation analysis, the technogenic 137Cs has a moderate relationship (on the Chaddock scale) with the 45 and 500 µm fraction. 232Th has a high affinity with 226Ra, and 40K with 232Th, which are statistically significant results when taking P-Value into account. It can be assumed that natural radionuclides 232Th, 40K, 226Ra have a moderate association with the 1 mm fraction due to the presence of particles of this size in the upper soil layer. There is a moderate relationship between 232Th and 40K.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"48 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588390","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}

引用次数: 0