Olga Dorzhieva

Olga Dorzhieva
Russian Academy of Sciences | RAS · Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM RAS)

About

26
Publications
5,258
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424
Citations
Citations since 2017
22 Research Items
422 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100

Publications

Publications (26)
Article
Full-text available
This article studies the geological structure, mineralogical composition, genesis and industrial properties of bentonite of the 10th Khutor deposit (Republic of Khakassia, Russia). The deposit is confined to the coal-bearing formation of Carboniferous age and is one of the main sources of bentonite for the metallurgical and foundry industries in Ru...
Article
Full-text available
The mineralogical, structural, crystal-chemical, and isotope-geochronological data were obtained vfor the first time in two samples of globular phyllosilicates (GPS) of the glauconite–illite series collected from terrigenous rocks in two sections of the lower part of the Lower Vendian Maastakh Formation (Khorbusuonka and Ulakhan-Sololi rivers, nort...
Article
Full-text available
The picturesque and high conservation value thermal landscapes of the Valley of Geysers feature endothermal (heated by endogenous fluids) soils which support endangered and unique species. However, such soils have not been distinguished as a separate taxon within most classification systems. In this study, we described the soil morphology at macro-...
Article
Full-text available
A representative collection of K-dioctahedral 1M micas ranging in composition from (Mg, Fe)-poor illites to aluminoceladonites through Mg-rich illites (Fe-poor varieties) and from Fe-bearing, Mg-rich illites to celadonites through Fe-illites, Al-glauconites and glauconites (Fe-bearing varieties) was studied by Fourier-transform infrared (FTIR) spec...
Article
Full-text available
This study is devoted to studying the sorption of 137Cs on mineral sorbents at a wide pH range, from 2 to 10, as well as to studying sorption mechanisms. In order to obtain the most reliable sorption characteristics, samples of high purity were examined as sorbents: bentonite, glauconite, zeolite, and diatomite. A detailed description of their mine...
Article
Full-text available
Complex studies revealed transformations of composition, structure, and properties of bentonite clays of the Taganskoe (Kazakhstan) and Dahskovskoe (Moscow oblast) deposits under thermochemical treatment. Leaching of cations from interlayer and octahedral sites, protonation of interlayer and OH-groups lead to the modification of interlayer and 2 :...
Article
Bentonites are often used as components of engineered barrier systems (EBS) for the radioactive waste disposal and isolation of hazardous nuclear facilities. In this paper, we consider possible transformations of the composition , structure and properties of bentonites when they are used as EBS components during the decom-missioning of open pools w...
Preprint
Full-text available
Complex studies revealed transformations of composition, structure, and 19 properties of bentonite clays of the Taganskoe (Kazakhstan) and Dahskovskoe (Moscow oblast) 20 deposits under thermochemical treatment. Leaching of cations from interlayer and octahedral 21 sites, protonation of interlayer and OH-groups lead to the modification of interlayer...
Article
In this work, we study different clay samples to examine the effect of structural features of clay minerals (2:1 and 1:1 structures), interlayer cations (Na/Ca/Li forms of montmorillonite), surface area and presence of accessory minerals (iron oxides, calcite, quartz) on Np(V) sorption at trace concentrations. Various techniques, e.g., XRD, XRF, DT...
Article
This work presents results of the complex mineralogical, geochemical, and isotope-geochronological investigation of globular dioctahedral 2: 1 phyllosilicates (GPS) of the illite–glauconite series from the Riphean sequences of the Olenek Uplift. It is established that GPS (glauconite, Al-glauconite, Fe-illite) in deposits of the Arymass, Debengda,...
Article
Iron-bearing K-dioctahedral 1M and 1Md micas are abundant in diverse geological environments and vary in composition from illite to celadonite through Fe-illite, Al-glauconite, and glauconite. The chemistry and structural features of these micas are complex and heterogeneous, reliable diagnostic criteria are lacking, and the conventional mineralogi...
Conference Paper
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Victoria Krupskaya, Sergey Zakusin, Ekaterina Tyupina, Olga Dorzhieva, Artem Pryadko, Petr Belousov, Boris Pokid’ko, Yana Bichkova
Article
A new type of quartz, a nano-quartz consisting of spherical particles, is assumed to have formed by crystallization in the sea during sedimentation of the chalk in the North Sea and to have remained largely intact during burial diagenesis. The presence and nature of this nano-quartz have not been identified until recently, despite the fact that thi...
Article
Full-text available
This paper discusses the mechanism of montmorillonite structural alteration and modification of bentonites' properties (based on samples from clay deposits Taganskoye, Kazakhstan and Mukhortala, Buriatia) under thermochemical treatment (treatment with inorganic acid solutions at different temperatures, concentrations and reaction times). Treatment...
Article
Full-text available
This paper discusses the mechanism of montmorillonite structural alteration and modification of bentonites' properties (based on samples from clay deposits Taganskoye, Kazakhstan and Mukhortala, Buriatia) under thermochemical treatment (treatment with inorganic acid solutions at different temperatures, concentrations and reaction times). Treatment...
Article
Full-text available
We have analyzed the specific features of the mineralogical composition of bottom sediments of Blagopoluchiya, Tsivol'ki, and Abrosimov bays and soils on Cape Zhelaniya and the coasts of Abrosimov and Stepovoi bays. The data were obtained during two scientific expeditions of the R/V Professor Shtokman in 2014 (cruise 128) and R/V Akademik Mstislav...
Article
Full-text available
The paper presents the generalized results of structural and crystal-chemical study of globular dioctahedral 2 : 1 layer silicates of the glauconite–illite composition (45 samples) taken from the Lower Cambrian sequences of North Siberia (Olenek Uplift); Riphean, Vendian, and Lower Cambrian sequences of East Siberia; Upper Riphean sequences of the...
Article
Al-rich K-dioctahedral 1M and 1Md micas are abundant in sedimentary rocks and form a continuous compositional series from (Mg,Fe)-poor illite to aluminoceladonite through Mg-rich illite. The complexity and heterogeneity of chemical composition and structural features, as well as the lack of reliable diagnostic criteria, complicate the identificatio...
Article
Full-text available
Modern society uses clays in an ever increasing quantity, making this category of minerals the most important industrial minerals for the future, being exploited for very wide varieties of industrial applications (agriculture, engineering, construction, geology, environment, and miscellaneous applications). The physical and chemical properties of k...

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Projects

Projects (3)
Project
Assessment of sorption capacity of natural and modified sorbents, as well as structural transformations, as a result of the influence of aggressive factors and their effects on the properties of sorbents in the development of effective filtration barrier compounds in the implementation of security arrangements at the objects of nuclear legacy.
Project
Investigation structure transformation and adsorption properties (SBET, CEC, also as Cs, Sr, U, Am adsorption) of montmorillonites due to thermochemical treatment