The Tendencies of the Development of the Mineral-Resources Sector at the Turn of the Century     

A.?L.?DergachevEmail author  V.?I.?Starostin 《Moscow University Geology Bulletin》2018,73(2):109-120

Important tendencies in development of the world mineral-resources sector at the beginning of the 21st century were an increase in production and consumption of mineral materials differentiated by types of metals and nonmetallic mineral raw materials, by countries and regions, as well as the concentration of the production of mineral raw materials in a small number of countries, and a reduction in industrial reserves of minerals in the world economy, even at the current stage of their extraction. These tendencies should be taken into account in working out a strategy for development of the Russian mineral raw-material base.  相似文献   

The Correlation of the Upper Cretaceous Zonal Schemes of the Eastern European Platform Based on Foraminifera,Radiolaria, and Nannoplankton     

V.?S.?VishnevskayaEmail author  L.?F.?Kopaevich  V.?N.?Beniamovskii  M.?N.?Ovechkina 《Moscow University Geology Bulletin》2018,73(2):131-140

This article proposes a biostratigraphic scheme for the Upper Cretaceous of the East European Platform on the basis of the distribution in the sections of three groups of microfossils: foraminifera (both planktonic and benthic), radiolarians, and nannoplankton. Most of the stage and substage boundaries are confirmed by macropaleontological data. The most divided units are those distinguished based on benthic foraminifers and nannoplankton. The diversity of these microfossils and their constant presence allowed us to identify zones and subzones, while it is possible to subdivide only the beds by planktonic foraminifers and radiolarians. The most favorable stages in the development of plankton biota can be considered the Turonian–Coniacian interval when the basins of the East European Platform experienced an intensive influence from warm waters of the Tethys Ocean. The global Campanian cooling is clearly recorded, which affected the taxonomic diversity of all microfossil groups.  相似文献   

The Effect of Aggregation of Impurity Nitrogen on Diamond X-Ray Luminescence     

S.?V.?VyatkinEmail author  G.?Yu.?Kriulina  V.?K.?Garanin  D.?G.?Koshchug  E.?A.?Vasilyev 《Moscow University Geology Bulletin》2018,73(2):161-165

Two samplings of 65 diamond crystals divided by the intensity of a slow X-ray luminescence component are studied from the Arkhangel’skaya and Karpinskogo-1 pipes. IR and EPR spectroscopies revealed a relationship between the nitrogen A and P2 centers of the diamonds and the presence of a slow X-ray luminescence component. Its absence in most diamonds with high content of P1 (C) centers is explained by the low number of A and P2 centers.  相似文献   

Biosorption of Rare-Earth Elements and Yttrium by Heterotrophic Bacteria in an Aqueous Environment     

E.?S.?KazakEmail author  E.?G.?Kalitina  N.?A.?Kharitonova  G.?A.?Chelnokov  E.?V.?Elovskii  I.?V.?Bragin 《Moscow University Geology Bulletin》2018,73(3):287-294

This paper reports the results of the experimental determination of the coefficient of sorption of rare-earth elements and yttrium (REY) under conditions of acidic pH using several strains of heterotrophic bacteria (Microbacterium sp., Curtobacterium sp., Bacillus subtilis, Pseudomonas putida, and Bacillus pumilis) that are widespread in natural and technogenic waters of the Far East (Russia). Insignificant fractionation between heavy and light rare-earth elements, negative cerium and dysprosium anomalies, and a positive europium anomaly were revealed. The selectivity of REY biosorption by gram-positive and gram-negative bacteria, as well as inertia of the biosorption process under more acidic conditions of the medium, were shown.  相似文献   

Integrated Geophysical Works on the Kozlovka Anomaly (Kaluga Region)     

V.?A.?KulikovEmail author  N.?V.?Lubnina  A.?Yu.?Palenov  A.?V.?Solovieva 《Moscow University Geology Bulletin》2018,73(3):312-319

This work presents integrated geophysical studies that were carried out to identify the nature of the intense magnetic anomaly detected by the results of land surveying on the right bank of the Slushka River in the territory of the Yukhnovskii district of Kaluga Region. The comprehensive interpretation of the geophysical data and the laboratory measurements of the core made it possible to determine the nature and parameters of the anomaly-forming object that is located in the upper part of the section; it consists of loams that contain such magnetic minerals as greigite, pyrrhotite, and magnetite.  相似文献   

The Structure of the Sedimentary Cover of the Kandalaksha Gulf,White Sea,from Seismoacoustic Data     

A.?V.?StarovoitovEmail author  M.?Yu.?Tokarev  Ya.?E.?Terekhina  N.?A.?Kozupitsa 《Moscow University Geology Bulletin》2018,73(3):295-305

The geological structure of water areas adjacent to the White Sea biological research station of Moscow State University (Rugozero Bay and Great Salma Strait; both are parts of the Kandalaksha Gulf, White Sea) was studied for the first time based on the seismoacoustic data. The morphology of the top of the Achaean basement, the structure of the Quaternary sedimentary cover, and the bottom topography were investigated. The sequence of glacial deposits dated back to the last glaciation and the compound sequence consisting of glaciolacustrine, glacial-marine, and marine sediments are distinguished. The spatial locations and changes of their thicknesses are considered. It is shown that the recent bottom topography is controlled by predominantly NW- and NE-striking faults that run through the entire sedimentary sequence, including the Holocene sediments.  相似文献   

Variation in the Microstructure of Clay Soil during Deformation under Triaxial Compression with Consideration of the Occurrence of Deformation Instability     

A. N. Usov  M. S. Chernov  V. N. Sokolov  E. A. Voznesensky 《Moscow University Geology Bulletin》2018,73(1):83-86

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The Timescales of Magma Mixing in the Plumbing System of Bezymianny Volcano (Kamchatka): Insights from Diffusion Chronometry     

V. O. Davydova  V. D. Shcherbakov  P. Yu. Plechov 《Moscow University Geology Bulletin》2018,73(5):444-450

Intrusion of magma of contrasting composition into a magma chamber often triggers eruptions of arc volcanoes. Application of the diffusion chronometry method allowed us to determine the time when fresh magma was supplied to the shallow chamber of Bezymianny volcano in the case of six eruptions in 2006–2012 and to compare them to the recorded seismic activity of this volcano. Two types of eruptions of Bezymianny volcano were distinguished, with a contrasting orthopyroxene rim being formed in the respective magmas (a) up to 3 years and (b) up to 2 months before the beginning of an eruption. It was shown that these differences are caused by two different paths of magma supply to the shallow chamber of Bezymianny volcano.  相似文献   

The Cyclic and Sequence Stratigraphic Characteristics of the Visean–Serpukhovian Deposits in the Southern Part of the Moscow Syneclise     

R. R. Gabdullin  A. V. Bershov  E. N. Samarin  N. V. Badulina  M. A. Afonin  S. I. Freiman 《Moscow University Geology Bulletin》2018,73(5):423-433

The composition and origin of the Visean–Serpukhovian deposits in the southern part of the Moscow Syneclise have been characterized based upon generalizations of our own results and analysis of published and unpublished data. The levels of karst-influenced rocks correspond to the shallowest biogenic carbonate organogenic-clastic sediments of the initial and final phases of the eustatic cycle, i.e., the early transgression (transgressive system tract) and the late regression (the second half of the high-standing tract). Alluvial sands of the Oka River have been found in the karst cavities. A generalized model of the sequence has been proposed and a sequence stratigraphic interpretation of the studied section has been carried out.  相似文献   

The Structure and Formation Conditions of the Bedenekir Formation Deposits (Thithonian Stage) of Mountainous Crimea     

R.?R.?GabdullinEmail author  N.?V.?Badulina  E.?A.?Bakai  E.?A.?Shcherbinina  E.?V.?Karpova  M.?A.?Varzanova  A.?V.?Sergienko  T.?A.?Konovalova 《Moscow University Geology Bulletin》2018,73(1):43-51

The composition and origin of the Bedenekir Formation deposits of Mountainous Crimea are detailed on the basis of our work results and analysis of both published and unpublished data.  相似文献