E. D. Bairova's research while affiliated with Russian Academy of Sciences and other places

Publications (27)

Data
Multi-layer geological map of the Elbrus neovolcanic center (Greater Caucasus). Scale 1/100000. Compiled by V.A. Lebedev (IGEM RAS) ©. File is in PSD (Photoshop) format. Layers: topography, hydrology and glaciers (snow line at September, 2010), infrastructure, geological borders, color fields. Reference should be given as: Lebedev V.A. Geological M...
Data
Multi-layer geological map of Pliocene Dzhimara massif of granodiorites and quartz diorites (Greater Caucasus, Russian-Georgian state border), located in the vicinity of Late Quaternary Kazbek Volcano. Scale 1/25000. Compiled by V.A. Lebedev (IGEM RAS) ©. File is in PSD (Photoshop) format. Layers: topography, hydrography, geology, color. Version...
Article
Full-text available
The chronology of evolution of the young explosive volcanism in the Elbrus area of the Greater Caucasus is revealed. The isotopic–geochronological data indicate that ignimbrites and associated volcanic rocks were formed during the Middle Pliocene (3.0–2.75 Ma) and Early Pleistocene (0.84–0.70 Ma) stages of magmatic activity of the Greater Caucasus....
Article
Full-text available
New isotope-geochronological data (K-Ar, Rb-Sr) provide tight geochronological constraints on the history of Late Cenozoic magmatism on the southern slope of the Greater Caucasus. Several previously unknown, rhyodacite intrusive bodies with an emplacement age of 6.9 ± 0.3 Ma (Late Miocene) are reported from the Kakheti-Lechkhumi regional fault zone...
Article
Full-text available
The intrusive rocks associated with the large Nezhdaninka gold deposit (Au > 470 t) hosted in the Permian carbonaceous terrigenous sequence have been dated on zircon and rock-forming minerals with precision U-Pb (ID-TIMS) and Rb-Sr methods. The lamprophyre of the dike complex that occurs in the ore field and spatially is related to gold mineralizat...
Article
Full-text available
The paper reports Rb-Sr isotopic data obtained by the authors on ore-hosting rocks from the Kairagach epithermal Au-Ag deposit in the Kurama ore district in the Central Tien Shan, Uzbekistan. The influence of mineralizing hydrothermal solutions on the host volcanic rocks of andesite-dacite composition and the metasomatic alterations of these rocks...
Article
An isotopic geochronological study of Russia’s largest Strel’tsovka uranium district has been carried out. Polychronous granite generation, which determined the structure of the pre-Mesozoic basement, had important implications for the formation of volcanotectonic structural elements bearing economic uranium mineralization. The study of U-Pb, Rb-Sr...
Article
Full-text available
Complex geochronological and isotope-geochemical studies showed that the Late Quaternary Elbrus volcano (Greater Caucasus) experienced long (approximately 200 ka) discrete evolution, with protracted periods of igneous quiescence (approximately 50 ka) between large-scale eruptions. The volcanic activity of Elbrus is subdivided into three phases: Mid...
Data
Multi-layer geological map of Elbrus Volcano (Greater Caucasus), the highest peak of Europe. Scale 1/25000. Compiled by V.A. Lebedev (IGEM RAS) ©. File is in PSD (Photoshop) format. Layers: topography, rivers and glaciers (snow line at September, 2010), mounts, infrastructure, geological borders, color fields. Reference should be given as: Lebedev...
Data
Comprehensive geochronological and isotope-geochemical studies showed that the Late Quaternary Elbrus Volcano (Greater Caucasus) experienced long (approximately 200 ka) discrete evolution with protracted periods of igneous quiescence (approximately 50 ka) between large-scale eruptions. Volcanic activity of Elbrus is subdivided into three phases: Mi...
Article
Full-text available
This paper reports an integrated petrological, geochronological, and isotopic geochemical study of the Pliocene Dzhimara granitoid massif (Greater Caucasus) located in the immediate vicinity of Quaternary Kazbek Volcano. Based on the obtained results, it was suggested that the massif has a multiphase origin, and temporal variations in the chemical...
Chapter
Full-text available
The monograph considers empirical relations in the evolution of volcanism in Eurasia and analyzes the effect of volcanism and impact events, which have similar consequences, on the environment and climate. The monograph consists of two parts. The first part presents the analysis of data on the Recent volcanism of Northern Eurasia, including a GIS m...
Article
Full-text available
The isotopic (δD, δ18O, δ13C, and 87Sr/86Sr) and geochemical characteristics of hydrothermal solutions from the Mid-Atlantic Ridge and the material of brucite-carbonate chimneys at the Lost City hydrothermal field at 30°N, MAR, were examined to assay the role of the major factors controlling the genesis of the fluid and hydrothermal chimneys of the...
Article
Full-text available
This paper presents results of the Rb‐Sr and K‐Ar isotope‐geochronological study of the Sukhoi Log deposit, one of the world’s largest noble metal deposits localized among metasedimentary black shales. The deposits of this type (Muruntau, Uzbekistan; Nezhdaninskoe, Russia; Ashanti, Gana; and others) account for a considerable part in the balance of...
Data
The isotopic (dD, d18O, d13C, and 87Sr/86Sr) and geochemical characteristics of hydrothermal solutions from the Mid-Atlantic Ridge and the material of brucite-carbonate chimneys at the Lost City hydrothermal field at 30°N, MAR, were examined to assay the role of the major factors controlling the genesis of the fluid and hydrothermal chimneys of the...
Article
Full-text available
The isotope–geochronological data obtained reveal a large center of Late Quaternary volcanism in the southern part of Republic of Georgia – Samsari volcanic center, with its main development phases corresponding to phases of magmatic activity previously defined for other areas of neovolcanic activity in the Caucasus region. According to these data,...
Article
Full-text available
Magmatic rocks on the territory of the Aktepe ore field were found to be formed as a result of at least thirteen discrete pulses of magma intrusion. Their formation sequence was determined by field observations. According to the geological–petrographic features, these rocks were divided into six associations, the age of which was successfully evalu...
Article
Petrological analysis of magmatic and metasomatic rocks and their K-Ar and Rb-Sr isotope dating show that the multistage tectonomagmatic activization in the study area lasted from the Late Triassic to the Middle Cretaceous. Four stages (impulses) of magmatic and hydrothermal activity were distinguished, each of which continued for 15-20 Ma and was...
Article
Data on the Sr and Nd isotope composition of the products of the Quaternary andesite volcanism in the Greater Caucasus are presented and discussed. Mantle material played a dominant role in the initial melts that produced these Quaternary volcanic complexes, but there was an appreciable proportion of crustal component. The Sr isotope data and the p...

Citations

... Fig. 13. Helium isotope composition in gases of the mineral waters in the Greater Caucasus and Talysh versus strontium isotope composition in young volcanic rocks of the Greater Caucasus according to (Ivanov et al., 1993;Bubnov et al., 1995;Chernyshov et al., 2000;Lavrushin, 2012;Polyak et al., 2000). Dash shows the line connecting isotope compositions of the mantle and crustal matter. ...
... The structure, mineralogical, and geochemical features as well as the origin of the mineralization of the Dzhidinskoe ore field have been studied by many researchers [1][2][3][4][18][19][20][21][22][23][24][25][26][27][28]. All the researchers marked the following feature of the Dzhidinskoe ore field: the hydrothermal ore formation had a pulsating character and repeatedly alternated with magmatic injections of mainly granite composition, and the ore mineralization profile changed in the following sequence: MoMo + BeBe + WW + Pb, Zn. ...
... They are characterized by the development of dioctahedral illites and mixed-layer illites-smectites associated with ferric carbonates and quartz. Below, these rocks are called "hydromica metasomatic rocks" (Andreeva, 1979;Andreeva and Golovin, 1998;Andreeva et al., 1996). ...
... It can be explained by the fact that this village receives drinking water from rivers originating from the slopes of Elbrus. Elbrus is considered a dormant volcano (Chernyshev et al., 2014). We have already noted that the waters of upper rivers originating from the slopes of Elbrus are characterized by a high content of aluminum (Reutova et al., 2018). ...
... The Kazbek (Mkinvartsveri), Keli, Elbrus ( Fig. 12.1), Kabardjina and Djava (Dzau) neovolcanic centres as well as of some other volcanos, erupted several times; Quaternary volcanic activity is also reported in the Lesser Caucasus (Pasquaré et al. 2011). Previous research (Burchuladze et al. 1976;Chernyshev et al. 2002Chernyshev et al. , 2008Vashakidze et al. 2019) has enabled to assess Holocene volcanic activity at the Kazbek and Elbrus volcanic centres, and thus the existence of volcanic hazard in the Greater Caucasus. This prompted the need for multidisciplinary geological, geophysical, petrological-geochemical and isotope studies regarding the Quaternary magmatic activity in this region. ...
... samxreTidan CrdiloeTis mimarTulebiT qedis ZiriTadi vulkanuri centrebi ganlagebulia aseTiTanmimdevrobiT:didi abuli, godorebi, qoroRli, samsari, Savnabada, beberiklde da TavkveTili. rogorc K-Ar izotopurma daTariRebam aCvena es vulkanuri qedi Sr da Nd izotopuri monacemebis mixedviT warmoadgenda aradepletirebuli mantiuri rezervuari ( 87 Sr/ 86 Sr = 0.704209; 143 Nd/ 144 Nd = 0.5127 )(Lebedev et al., 2003). am Sromis mixedviT samsaris qedis vulkanuri aparatebis formireba mimdinareobda samxreTidan CrdiloeTis mimarTulebiT, radganac am qedis ukiduresi samxreTi vulkani didi abuli yvelaze Zveli warmonaqmnia (410 aTasi weli; K-Ar daTariReba), xolo yvelaze CrdiloeTiT mdebare vulkani TavkveTili -yvelaze axalgazrda (30 aTasi weli; K-Ar daTariReba). ...
... South Verkhoyansk Magmatic Belt This N-S-oriented Magmatic belt attains a length of 400 km in the central portion of the Verkhoyansk orogenic belt in the back-arc region of the Uda-Murgal and Okhotsk-Chukotka arcs(Figure 1). The granitoids it contains were emplaced during two Major pulses of subduction-related Magmatism and deformation in the region at 125-120 Ma (Early Cretaceous) and 95-90 Ma (early Late Cretaceous)[44,78,79]. ...
... The oldest magmatism occurred in the Guria (western Adjara-Trialet Belt, c. 15 and 9-7.5 Ma; Lebedev, Bubnov, et al., 2009;Lebedev, Chernyshev, & Sharkov, 2011) and Mineral'nyye Vody (Caucasian Mineral Waters, c. 8.3 Ma; regions to the south and north of the main range, respectively. Magmatism on its southern slope, around the Utsera fault, occurred between c. 7.2 and 6.0 Ma (Lebedev et al., 2013). In the core of the western Greater Caucasus it is younger, being concentrated between 4.5 and 1.6 Ma (Hess et al., 1986;Lebedev, Bubnov, et al., 2006;Lebedev, Chernyshev, & Sharkov, 2011;Lebedev, Sakhno, & Yakushev, 2009). ...
... This pulse of the Late Cenozoic endogenous activity is the earliest among young magmatic mani festation of the Greater Caucasus. The second areal is located in the southern part of the Elbrus neovolcanic area confined to the Peredovoy Range zone and includes granite massifs (Eldzhurtu and others) with an age from 2.8 to 1.8 Ma Gazis et al., 1995;Chernyshev et al., 2011). ...
... It is conceivable that this destruc tion resulted from penetration of the Pacific super plume under the margin of the Eurasian continent. In this area, it collided in the late Oligocene with the North Asian superplume, which reached the conti nental margin as early as in the Late Cretaceous [11]. This collision provoked the formation of marginal seas and the entire unique transition zone, which is missing in other areas at the ocean-continent boundary, since similar collisions are nowhere observable, at least on such a scale. ...