A5017731056- Geochemistry and Elemental Analysis
- Clay minerals and soil interactions
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Bauxite Residue and Utilization
- Geological and Geochemical Analysis
- Geotechnical and Geomechanical Engineering
- Paleontology and Stratigraphy of Fossils
- Mining and Gasification Technologies
- Geomagnetism and Paleomagnetism Studies
- Adsorption, diffusion, and thermodynamic properties of materials
- Crystal Structures and Properties
- Minerals Flotation and Separation Techniques
- Geology and Paleoclimatology Research
- Mineralogy and Gemology Studies
- Geological formations and processes
- Chemical Synthesis and Characterization
- Marine and environmental studies
- Glass properties and applications
- Geotechnical and construction materials studies
- Thermal and Kinetic Analysis
- Iron oxide chemistry and applications
- Hydrocarbon exploration and reservoir analysis
- Metal Extraction and Bioleaching
- Chalcogenide Semiconductor Thin Films
Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry
2015-2024
Lomonosov Moscow State University
2020
Russian Academy of Sciences
2009-2015
Zavaritsky Institute of Geology and Geochemistry
2002
Abstract Lagerstätten, places where soft‐bodied organisms became mineralized, provide a substantial bulk of palaeobiological information, but the detailed mechanisms how soft‐tissue preservation takes place remain debatable. An experimental taphonomy approach, which allows for direct study decay and mineralization, offers means to preservational potential different under controlled conditions. Here we compare capacity two types clay (kaolinite montmorillonite) through long‐term (24 month)...
The study of a large amount factual material about the formation conditions gibbsite or boehmite and their mutual transformations in lateritic bauxites allowed us to solve problem its spatial genetic relationship gibbsite. occurred only during sedimentary-lateritic from alluvial lacustrine sediments that underwent bleaching resilification at stage sediment flooding, as well on bleached bedrock under bauxites. most intense depth 20–30 m surface was accompanied by an alumina input, which...
Abstract The mechanism that guides the formation of exceptionally preserved fossils with soft tissues variously displayed is a paramount challenge to paleontology. key question for exceptional preservation nature slowdown decay and acceleration tissue mineralization. Here we report experimental subfossils brine shrimp Artemia salina (Crustacea, Branchiopoda), which were produced during 14 months aging in kaolinite clay sediment. EDS/SEM elemental analyses showed as thin clay-organic replicas...
Cambrian Lagerstätten host rocks are frequently composed of kaolinite and chlorite in varying amounts; accordingly, our goal was to study the preservation potential crustaceans these two clays. We conducted long-term experiments (12–18 months, longest duration actualistic taphonomy from published literature) on decay Artemia salina clay sediments. The degree preservation, transformed mineralogical composition sediments, elemental nauplial remains were examined. demonstrate that sediment...
The effect of dispersivity on thermodynamic and kinetic parameters chemical reactions in nanodispersed systems is theoretically investigated. On the basis established theoretical dependences new method determination surface properties nanoparticles (surface enthalpy, entropy energy) by thermal analysis (DTA or DSC) was developed. Three examples calculation were presented to prove feasibility this method.
Research Article| April 10, 2018 PERSISTENCE OF EXTERNAL ANATOMY SMALL CRUSTACEANS IN A LONG TERM TAPHONOMIC EXPERIMENT ELENA NAIMARK; NAIMARK 1A.A. Borissyak Paleontological Institute of Russian Academy Sciences, Moscow 117647 Russia Search for other works by this author on: GSW Google Scholar MARIA KALININA; KALININA 2A.N. Frumkin Physical Chemistry and Electrochemistry 119071 NATALIA BOEVA 3Institute Geology Ore Deposits, Petrography, Mineralogy, Geochemistry, 119017 PALAIOS (2018) 33...
The study of lateritic bauxite by electron microscopy revealed abundant products interaction between organic matter and minerals. Abundant biomineral films different genesis composition were found, including Al, Fe, Al-Fe, Al-Si, Al-Fe-Si, sorbed rare rare-earth elements (REE). evolution these from amorphous to crystallized the conversion into druse crystals gibbsite, hematite, kaolinite etc. was traced. New data obtained on mineralization deposits wood, roots, biofilms bacteria in tropical...
Abstract The reliability of evolutionary reconstructions based on the fossil record critically depends our knowledge factors affecting fossilization soft‐bodied organisms. Despite considerable research effort, these are still poorly understood. In order to elucidate main prerequisites for preservation organisms, we conducted long‐term (1–5 years) taphonomic experiments with model crustacean Artemia salina buried in five different sediments. subsequent analysis carcasses and sediments...
Abstract The correlation between the crystal morphological peculiarities of gibbsite and its position in a bauxite-bearing weathering profile is revealed from example Tsentral’noe deposit Chadobets Uplift. free space favorable for growth increases bottom to top various parts as result infiltration metasomatosis physicochemical conditions. higher rock, porosity. size crystals thus increases, their morphology becomes more complex upward through section. results thermal analysis showed that...