A5053990912- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Clay minerals and soil interactions
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Polymer-Based Agricultural Enhancements
- Geochemistry and Geologic Mapping
- Crystal Structures and Properties
- Geochemistry and Elemental Analysis
- Laser-Ablation Synthesis of Nanoparticles
- Peatlands and Wetlands Ecology
- Mining and Gasification Technologies
- Iron oxide chemistry and applications
- Graphene research and applications
- Pesticide and Herbicide Environmental Studies
- Marine and coastal ecosystems
- High-pressure geophysics and materials
- Paleontology and Stratigraphy of Fossils
- Metal Extraction and Bioleaching
- Luminescence Properties of Advanced Materials
- CO2 Sequestration and Geologic Interactions
National Research Tomsk State University
2015-2025
Tomsk Polytechnic University
2015-2025
Second-order Raman modes correlate with the electrical properties of reduced graphene oxide measured at nanoscale by atomic force microscopy.
This study considers the features of chemical composition, internal structure, and oscillatory zoning sulfosalts sulfates in epithermal high–intermediate-sulfidation-type Au-Ag-Te Emmy deposit (Khabarovsk Territory, Russia). In deposit, primarily represent goldfieldite, probably corresponding to a high-sulfidation (HS) mineral association replaced bytennantite–tetrahedrite group minerals. The latter is associated with tellurides native tellurium, an intermediate-sulfidation (IS)-type ore...
Abstract. The East Siberian Arctic Shelf (ESAS) is the broadest and shallowest continental shelf in world. It characterized by both highest rate of coastal erosion world a large riverine input terrigenous dissolved organic matter (DOM). DOM plays significant role marine aquatic ecosystems. chromophoric fraction (CDOM) directly affects quantity spectral quality available light, thereby impacting primary production ultraviolet (UV) exposure A multiyear study CDOM absorption, fluorescence,...
Abstract Subsea permafrost represents a large carbon pool that might be or become significant greenhouse gas source. Scarcity of observational data causes uncertainties. We here use five 21-56 m long subsea cores from the Laptev Sea to constrain organic (OC) storage and sources, degradation state potential production upon thaw. Grain sizes, optically-stimulated luminescence biomarkers suggest deposition aeolian silt fluvial sand over 160 000 years, with dominant fluvial/alluvial forest-...
Abstract. It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly occur as submarine groundwater (SGD), yet there are no direct observations of this phenomenon in shelf seas. This study tests hypothesis SGD does exist Siberian Shelf seas, but its dynamics be largely controlled by complicated geocryological conditions such permafrost. The field-observational approach southeastern Laptev Sea used a combination hydrological (temperature, salinity),...
Abstract This study investigates the process of formation ooidal ironstones in Upper Cretaceous-Paleogene succession western Siberia. The such carbonate-based is a continuing problem sedimentary geology, and this study, we use variety data proxies assembled from core samples to develop model explain how formed. Research on pyrite framboids geochemical redox reveals three intervals oceanic hypoxia during deposition marine Late Cretaceous Early Paleogene Bakchar ironstone deposit Siberia;...
Studies of mineral-forming processes in modern peat bogs can shed light on metal concentrations and their cycling similar environments, especially geological paleoanalogs. In terms the mineralogical geochemical evolution bog Vasyugan Swamp Western Siberia is a unique scientific object. Twelve samples were collected from up to depth 275 cm at 25 intervals. The studied deposit section represented by oligotrophic (0–100 cm), mesotrophic (100–175 eutrophic (175–275 cm) peat, this underlain basal...
Abstract Authigenesis of ferrimagnetic iron sulfide minerals (greigite and monoclinic pyrrhotite) occurred across the Paleocene‐Eocene Thermal Maximum (PETM) within Bakchar oolitic ironstone in southeastern Western Siberia. Co‐occurrence these is associated with diagenetic environments that support anaerobic oxidation methane, which has been validated by methane fluid inclusion analysis studied sediments. In modern settings, such formation linked to upward diffusion presence minor dissolved...
We investigated the mechanochemical synthesis of complex slow release fertilizers (SRF) derived from glauconite. studied effectiveness mechanical intercalation urea into glauconite using planetary and ring mills. The potassium-nitric SRFs were synthesized via a method mixing with in 3:1 ratio. obtained composites analyzed X-ray diffraction analysis, scanning electron microscopy, fluorescence infrared spectroscopy. results show that as duration activation increases, mineralogical, chemical,...
This paper studies the chemical and mechanochemical preparation of glauconite with ammonium dihydrogen phosphate (ADP) nanocomposites a ratio 9:1 in vol.% wt.%, respectively. The methods include X-ray diffraction analysis, scanning electron microscope energy-dispersive spectroscopy, transmission microscopy, infrared differential thermal analysis quadruple mass spectrometer. manufactured keep flaky structure. Some unit structures have been thickened due to minimal nitrogen (ammonium)...
The aim of this research was to study the rare earth (REE) minerals in ooidal ironstone deposits West Siberian basin and Turgai depression. Authigenic (monazite cerite) were described, their main mineral form identified as light element phosphate (LREE-phosphate) study. LREE-phosphate is included ferruginous ooids, peloids, oncoids forms a consistent association with Fe-hydroxides (goethite its hydrated amorphous derivatives) Fe-rich layered silicates (Fe-illite-smectite, chamosite,...
Authigenic carbonates from cold seeps are unique archives for studying environmental conditions, including biogeochemical processes associated with methane-rich fluid migration through the sediment column. The aim of this research was to study major oxide, mineralogical, and stable isotopic compositions cold-seep authigenic collected in northern part Laptev Sea. These represented by Mg-calcite an Mg content 2% 8%. δ13C values range −27.5‰ −28.2‰ Vienna Peedee belemnite (VPDB) indicate that...
This study reports on the development of nanocomposites utilizing a mineral inhibitor and micronutrient filler. The objective was to produce slow release fertilizer, with zinc sulfate as filler halloysite nanotubes inhibitor. seeks chemically activate intercalation into macro-, meso-, micropores enhance their performance. As result, we obtained three in solution concentrations 2%, 20%, 40%, respectively, which named Hly-7Å-Zn2, Hly-7Å-Zn20, Hly-7Å-Zn40. We investigated encapsulation using...
This study considers the features of chemical composition, internal structure, and oscillatory zoning sulfides, sulfosalts sulfates in epithermal high-intermediate sulfidation type Au-Ag-Te Emmy deposit (Khabarovsk Territory), Russia. In this most widespread sulfide is pyrite occurring two generations: pre-ore pure (I) with cubic crystal habit dimensions from 20 μm to 0.5 mm early barren hydrothermal stage, (II) ore which represented by (a) colloform aggregates (IIa) formed as a result rapid...
Abstract. Thaw of subsea permafrost across the Arctic Ocean shelves might promote degradation organic matter to CO2 and CH4, but also create conduits for transfer deeper CH4 pools atmosphere thereby amplify global warming. In this study, we describe sedimentary characteristics three cores 21–56 m length drilled near current delta Lena River in Buor–Khaya Bay on East Siberian Shelf, including content, origin state around thaw front. Grain size distribution optically stimulated luminescence...