Maxim Rudmin

Tomsk Polytechnic University · Division for Geology

Abstract This study investigates the process of formation of ooidal ironstones in the Upper Cretaceous-Paleogene succession in western Siberia. The formation of such carbonate-based ironstones is a continuing problem in sedimentary geology, and in this study, we use a variety of data and proxies assembled from core samples to develop a model to exp...

This study demonstrates the formulation of slow-release fertilizers by the mechanical activation of a mixture of powdered clays and urea in the ratio 2:3, using planetary or ring milling techniques. The activation produces micro-aggregates of composites with intercalated clay and urea and is rimmed by the latter. Smectite-urea and glauconite-urea m...

A detailed study of cement and matrix of ooidal ironstones of the Bakchar deposit (Western Siberia) was carried out to assess the factors influencing ore-forming processes. This research focusses on a debatable issue about iron sources for Phanerozoic ooidal ironstone. Siderite, the main cementing mineral in the ironstones, is of two varieties that...

This paper is devoted to a study of the nature and origin of the mineral matter in the Vasyugan Mire in Western Siberia. Based on mineralogical and geochemical analyses, new results were obtained concerning the mineral composition within the bottom part of the peat deposit for different landscape zones in the Vasyugan Mire. This part of the peat de...

With the over-use of tetracycline (TC) and its ultimate accumulation in aquatic systems, the demand for TC removal from contaminated water is increasing due to its severe threat to public health. Clay minerals have attracted great attention as low-cost adsorbents for controlling water pollution. The objective of the present study was to measure the...

This work is devoted to the development of a method of obtaining a sorbent for cleaning water surfaces of oil films using a sorbent based on natural glauconite modified with a ferromagnetic component and hydrophobisator. The optimum content of modifying agents as well as the modes of thermal activation which provide high buoyancy to the sorbent, an...

Dissolved organic carbon (DOC) is the largest reduced carbon reservoir in modern oceans¹,². Its dynamics regulate marine communities and atmospheric CO₂ levels³,⁴, whereas ¹³C compositions track ecosystem structure and autotrophic metabolism⁵. However, the geologic history of marine DOC remains entirely unconstrained⁶,⁷, hindering our ability to me...

The soil fertility largely depends of balance of crucial nutrients, which affects the crop. Different fertilisers, including mineral fertilisers, are used to increase yield. Conventional fertilisers can deplete soil humus, causing increased emissions, soil salinisation besides other environmental hazards. Green fertilisers are needed to restore soi...

The study of rare earth elements (REEs) in marine sediments is a powerful geochemical tool for determining depositional processes and sediment provenance, as well as for understanding paleoenvironmental changes. In this context, we present REE, some major and trace elements, grain size, and mineralogy data on surface and core sediments, which were...

Relevance. Development of controlled release fertilisers and their granulation is at the forefront of agriculture and environment. With growing world population and increasing food demand, agriculture faces the challenge of efficient resource management and increased crop yields. In this environmentally friendly and easy to obtain and use fertilise...

We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the South-Western branch of the Talnakh intrusion (Noril’sk area) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1–3 vol%. The petrographic and mineralogical features of these ores indicated occurrence of fine-gr...

We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the SouthWestern branch of the Talnakh intrusion (Noril'sk area) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1-3 vol%. The petrographic and mineralogical features of these ores indicated occurrence of fine-gra...

The East Siberian Arctic shelf is renowned for its active methane-rich fluid seeps, confirmed by numerous gas flares in the water column and direct observations of methane release from the seafloor. These cold-seep sites serve as natural laboratories for studying the impact of methane seepage on early diagenesis, authigenic mineral formation, and t...

This study reports on the development of nanocomposites utilizing a mineral inhibitor and a micronutrient filler. The objective was to produce a slow release fertilizer, with zinc sulfate as the filler and halloysite nanotubes as the inhibitor. The study seeks to chemically activate the intercalation of zinc into the macro-, meso-, and micropores o...

The study of the spatiotemporal relationships of metasomatites and ores of various zones of the epithermal Au-Ag deposit Svetloe (Khabarovsk Region) using a traditional mineralogical and petrographic approach made it possible to establish several stages of ore formation confined to two paleovolcanic structures of the central type. The early stage c...

This article presents the results of a study of glauconite obtained from phosphate rock waste. The aim is to study the morphological, structural and chemical characteristics of glauconite and to determine the potential for secondary use of mining waste in the agricultural sector. The electromagnetic separation method was used to obtain glauconite c...

This paper studies the chemical and mechanochemical preparation of glauconite with ammonium dihydrogen phosphate (ADP) nanocomposites with a ratio of 9:1 in the vol.% and wt.%, respectively. The methods include X-ray diffraction analysis, scanning electron microscope with energy-dispersive X-ray spectroscopy, transmission electron microscopy, infra...

We present new mineralogical data of cronstedtite from the Southern-2 orebody, located in the South-Western branch of the Talnakh intrusion (Noril'sk camp) composed of massive sulfides in which the total amount of oxides and silicates does not exceed 1–3 vol. %. The petrographic and mineralogical features of these ores indicated occurrence of fine-...

The depleting fossil fuels and anthropogenic climate change require involvement of renewable energy resources, including animal wastes. One of the effective, although less studied, ways of the cattle manure transformation to a convenient energy source is its microwave pyrolysis (MWP) into a combustible gas. The MWP of cattle manure was experimental...

Predominantly fine-grained strata deposited on the East Siberia craton are considered to mainly consist of Neoproterozoic sandstones. Clastic rocks near the unconformity border of the Edia-caran and Riphean are represented by sandstone and siltstone layers with thicknesses of several tens of metres belong to the Nepa, Tira and Byuk horizons in the...

Fine-grained strata deposited on the Eastern Siberian craton are predominantly considered to mainly consist of Neoproterozoic sandstones. Clastic rocks near the unconformity border of the Ediacaran and the Riphean are represented by sandstone and siltstone layers with thicknesses of several tens of meters, belonging to the Nepa, Tira, and Byuk hori...

Western Siberia is widely covered by marine sedimentary deposits comprising clastic Middle Triassic through Middle Paleogene rock units. To shed new light on depositional and post-depositional processes, we have conducted a comprehensive analysis on Late Mesozoic-Early Cenozoic materials from the West Siberian epicontinental basin. The foraminifera...

The formation of clay minerals in volcanic successions follows various evolutionary trends, the understanding of which is crucial for estimating the age of volcanism and the prospecting clay deposits. Early Devonian volcanics within the Byskar Series of the Minusa Depression (Khakassia) are variably altered to a range of phyllosilicate mineral asse...

Актуальность работы обусловлена необходимостью развития минерально-сырьевой базы месторождений высококачественного сорбционного сырья России, а также изучения свойств природных сорбентов с целью их дальнейшего применения на практике. Целью работы является изучение особенностей геологического строения, условий образования, минерального состава и со...

This work studies the mineralogical and geochemical features of ooidal ironstone formation of the Upper Cretaceous Ayat Formation located in the Turgay depression (Kazakhstan). The origin of ooidal ironstone deposits has been the subject of many discussions for a long time. These results present diagenetic conditions of the marine ironstone precipi...

The relevance of this study is determined by lack of information of the behavior and accumulation of non-conventional metals (-oids), such as tellurium, bismuth, selenium (TBS-microelements), involved in modern industries, as well as the limited information about deposits, in which they are able to accumulate significant concentrations, including i...

This study presents results of the petrographic, mineralogical, stable isotopes of oxygen and carbon, and trace element investigation of authigenic carbonates collected at newly discovered active cold seeps on the Laptev Sea continental slope at ~300 m water depth. These carbonates are mainly represented by Mg-calcite with MgCO3 content from 9.1 mo...

This investigation aims to design controlled-release nanocomposites based on mechanical activation of a mixture of glauconite and nitrogen nutrients in a 1:1 ratio. The methods include mechanochemical preparation of composites, X-ray diffraction analysis, scanning electron microscope with energy-dispersive X-ray spectroscopy (SEM–EDS), high-resolut...

This study investigates the authigenically formed Late Cretaceous and Paleogene marine ironstones in Western Siberia (Russia) based on petrographic and spectroscopic investigations. In the Upper Cretaceous Kuznetsovo, Ipatovo, Slavgorod, Gan'kino and Paleogene Lyulinvor Formations of the West Siberian ironstone basin, there are three main ore horiz...

WC/Y–TZP–Al2O3 hybrid ceramic–matrix composites (CMCs) with dispersed Hadfield steel particles were sintered and then tested at sliding speeds in the range of 7–37 m/s and contact pressure 5 MPa. Fast and low-temperature sinter-forging allowed obtaining micron-sized WC grains, submicron-sized alumina-reinforced yttria partially stabilized polycryst...

The article is devoted to analysis of the glauconite resource base in Russia. The geotectonic and lithological-paleogeographic positions of deposits and large glauconite occurrences, and their formation onditions are considered. Based on the structural position, age, and spatial localization of deposits and occurrences, glauconite provinces are ide...

Статья посвящена анализу минерально-сырьевой базы глауконита России, рассмотрены геотекто-ническая и литолого-палеогеографическая позиции месторождений и крупных проявлений глауко-нита, условия их образования. На основании структурной позиции, возраста и пространственной локализации месторождений и проявлений, выделены глауконитовые провинции и опр...

This research presents the mechanical creation of smart fertilizers from a mixture of smectite and urea in a 3:2 ratio by using the planetary milling technique. The smectite–urea composites show intercalation between urea and mineral, which increases steadily with increasing activation time. A shift of X-Ray Diffraction basal reflections, intensiti...

Sedimentary records suggest that the mid-Proterozoic (ca. 1.8–0.8 Ga) was persistently characterized by a greenhouse climate despite significantly lower solar luminosity compared to modern levels. To maintain greenhouse conditions, the partial pressure of carbon dioxide (pCO2) must have remained elevated, possibly indicative of key differences in t...

Relevance of the research. More than 20 gold-pyrite deposits are known in the Chingiz-Tarbogatai structural-formational zone. All deposits have one problem in common: during ore dressing, a significant part of the gold goes into the «pyrite» concentrate and is lost along with the «tailings». In increasing gold recovery, we studied in detail the min...

The results of a study of sintered composites based on yttria-stabilized zirconia (ZrO2) reinforced with single-walled carbon nanotubes (SWCNTs) are presented in this paper. Mixing of ZrO2 nanopowder with SWCNTs was carried out in ethanol using an ultrasonic bath and a magnetic stirrer. Composite powders with 0.1, 0.5 and 1 wt.% SWCNTs and ZrO2 nan...

Foreseeably, coal remains one of the main energy sources in the global economy. Huge amounts of hazardous coal mining wastes, coal slack may be converted to usable fuel. Producing high-strength fuel pellets from coal slack using a biomass binder presents an objective. Experimental research into combining coal wastes with wheat bran binder using pro...

The Valley of Lakes basin (Mongolia) contains a unique continental sedimentary archive, suitable for constraining the influence of tectonics and climate change on the aridification of Central Asia in the Cenozoic. We identify the sedimentary provenance, the (post)depositional environment and the palaeo-climate based on sedimentological, petrographi...

This study reconstructs the depositional conditions of ironstones within the Chulym-Yenisey basin and assesses the iron source. The detrital minerals of the studied deposits include quartz and feldspar. The authigenic minerals are goethite, siderite, aragonite, dolomite, calcite, apatite, barite, and pyrite. The clay components include minerals of...

High-speed continuous sliding experiments on ZrB2-20 vol% SiC ultra-high temperature ceramics have been carried out to elucidate specifics and details of tribooxidation under conditions of subsurface deformation and friction generated heating. Subsurface multilayer structure layer phase composition was obtained to testify on the intense mass transf...

A detailed study of CallovianCalloviangolden oolitesGolden oolite of Jhumara FormationJhumara Formation from Keera dome, Kutch basinKutch Basin reveals a similarity in the chemical signature of JurassicJurassic ironstones across the globe. An integrated sedimentological and stratigraphical approach involving petrographical, mineralogical, textural...

Channel ironstone deposits (CID) represent a unique variety of iron-rich sedimentary rocks, which are mostly found in Northern Kazakhstan and in Western Australia. The origin and the depositional conditions of this rare variety of ironstone are poorly understood. This study investigates the nature of the Lisakovsk CID and assesses the iron source(s...

The Special Issue ”Iron Biogeochemical Cycle: Relationship with Global and Regional Geological Processes, and Ore Deposits Formation“ focuses on the review of biogeochemical processes for the origin of iron-rich deposits. Factors controlling ironstones’ distribution, metal sources, and mineral formation mechanisms are yet to be properly understood....

Heavy metals are among the most common pollutants affecting biological systems when ingested with drinking water and food. Heavy metal ions are capable of bioaccumulation in a human body and could cause various metabolic disorders. Here we present the results of using a unique glauconite from the Barguzinsky deposit as an adsorbent for heavy metals...

The Svetloye epithermal district (SED) is located within the Okhotsk-Chukotka volcanic belt (OCVB), 220 km southwest of Okhotsk. The OCVB, which formed during the Cretaceous with ore potential, is a large marginal volcanic rock belt associated with continental subduction. Svetloye occupies two volcanic edifices of different ages – the northwestern...

The Valley of Lakes basin (Mongolia) contains a unique continental sedimentary archive, suitable for constraining the influence of tectonics and climate change on the aridification of Central Asia in the Cenozoic. We identify the sedimentary provenance, the (post)depositional environment and the palaeo-climate based on sedimentological, petrographi...

In this work, composites based on 3 mol. % yttria-stabilized zirconia (3YSZ) with additives of 1, 5 and 10 wt. % multi-walled carbon nanotubes (MWCNT) were investigated. Samples were obtained by cold pressing followed by vacuum pressureless sintering at a temperature of 1500 °C. It was found that MWCNTs retain their structure after high-temperature...

This study is aimed at characterizing the distribution and speciation of the rare earth elements and yttrium (REE + Y) in ooidal ironstones from the Kamysh-Burun deposit (Kerch Peninsula), wit h implications for the depositional environments and contributions of different REE + Y carriers to the ore budget. The Lower Pliocene ooidal ironstone seque...

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 of cold-seep authigenic carbonates collected...

In this work, ZrO2 composites reinforced by single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT) and graphene nanoplatelets (GNP) were investigated. Composites were prepared by spark plasma sintering at a temperature of 1500°C. The influence of various carbon nanomaterials (CNM) on the microstructure, densification, microha...

Glauconite is one of natural clay minerals that are low-cost and readily available. Its specific characters, including potassium cations activity, layered structure and absorption capacity, explain the comprehensive interest to this mineral. It is especially prospective in regard of water treatment. Glauconite composition depends on the formation c...

Methane seeps is a widespread phenomenon observed on the shelves and continental slopes of inland and border seas around the world, including the Laptev Sea. Key biogeochemical processes occurring in the bottom sediments of these areas are the anaerobic oxidation of methane in combination with bacterial sulfate reduction. Both of these processes co...

The relevance of the modern volcanism study is to understand the complex processes of the magma differentiation, assimilation and mixing that recorded in the mineralogical, structural and petrochemical features of volcanic rock units. On the other hand, economically significant deposit of non-ferrous and noble metals is often associated with basic...

This study explores the fertilizer potential of glauconitic soil by monitoring its impact on the growth of plants during the second growing season after application. Our study documents a higher growth of oats (Avena sativa) in glauconitic amended soil compared to that recorded with the control sample at the end of a 97-day-long experiment. Concent...

Представлены результаты экспериментальных исследований по разработке научно-технических основ метода получения кубического карбида титана в плазме дугового разряда постоянного тока, инициированного в воздушной среде. По данным рентгеновской дифрактометрии порошковых материалов, полученных в серии экспериментов, определены зависимости фазового соста...

The results of experimental studies on the development of scientific and technical foundations of a method to obtain cubic titanium carbide in plasma of a DC arc discharge initiated in air have been presented. According to X-ray diffractometry of powder materials obtained in a series of experiments, the dependences of phase composition of the produ...

The paper presents the results of a study on clay minerals and detrital material of biosiliceous rocks (Paleocene–Eocene) from three sections in the Transuralian region. The authigenic processes in sediments resulted in the formation of dioctahedral clay minerals (illite, smectite) and insignificant amounts of sulfide phases (pyrite, hydrotroillite...

Peat bogs play an important role in the functioning of the biogeochemical cycles of the chemical elements that are connected to climatological and environmental changes, at least at the regional level. For several decades, this has made the issue of wetland evolution of particular interest among the scientific community worldwide. A number of autho...

The objective of this work was to study adaptive mechanisms and behavior of ZrB2-20 vol.% SiC ultra high-temperature ceramics in low-speed and high-speed sliding against a high-speed steel disk. The worn surfaces of ceramic samples were examined and characterized for chemical composition and mechanical properties. Intense tribooxidation of the comp...

The aim of this research was to study the rare earth (REE) minerals in ooidal ironstone deposits of the West Siberian basin and the Turgai depression. Authigenic minerals (monazite and cerite) were described, and their main mineral form was identified as light rare earth element phosphate (LREE-phosphate) in this study. LREE-phosphate is included i...

Two exposures of a thick kaolinitic weathering crust located in the banks of the River Tom, in Tomsk, West Siberia were investigated by X-ray diffraction, scanning electron microscopy and X-ray fluorescence analyses. The weathering crusts are developed upon a near vertical series of laminated fine-grained sandstones and siltstones of Carboniferous...