SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This study examines radiation-induced paramagnetic centers in real silver bromide photographic emulsion microcrystals using electron paramagnetic resonance. Silver bromide emulsions sampled during chemical ripening were concentrated without altering photographic properties, irradiated with cobalt-60…
This study compares the gamma radiolysis of silver oxalate, silver sulfate, and silver thiocyanate in air, including dry, moist, and water-covered samples. The authors used chemical analysis, X-ray diffraction, infrared spectroscopy, and electron microscopy to identify products and follow surface ch…
This study examines whether nitrate ions can serve as specific electron acceptors for determining radiolytic electron yields in frozen aqueous matrices. Frozen 8 M sodium perchlorate and 9 M sodium hydroxide solutions containing sodium nitrate were irradiated at liquid nitrogen temperature, and nitr…
This paper examines whether perchlorate radicals are formed during radiolysis of perchlorate-containing systems, a question left unresolved by earlier electron paramagnetic resonance studies. The authors compare the thermal appearance of chlorine dioxide and molecular oxygen after low-temperature ir…
This study examines the role of reducing species, especially free electrons, in the formation and destruction of dichloride and dibromide ions during low-temperature radiolysis of frozen concentrated hydrochloric and hydrobromic acids. Using X-ray irradiation at 77 K and spectrophotometric measureme…
This paper examines whether measuring gas pressure changes during irradiation in vacuum can provide quantitative information on radiolysis rates in solid inorganic salts. A simplified diffusion model is proposed in which gaseous products accumulate in the crystal interior and escape from thin near-s…
This study examines intermediate radical and electronic processes in potassium chlorate single crystals irradiated at liquid nitrogen temperature. Using EPR and low-temperature optical spectroscopy during stepwise warming and refreezing, the authors track the thermal stability and transformation of …
This study examines low-temperature optical absorption spectra of X-irradiated single crystals of sodium chlorate and potassium chlorate in order to clarify the fate of electrons produced during chlorate radiolysis. Crystals irradiated at liquid-nitrogen temperature were measured during controlled w…
Electron paramagnetic resonance was used to study the formation of the ClO3 radical in pure single crystals of potassium perchlorate irradiated by 1.6 MeV electrons at room temperature. The spectra identify ClO3 in two lattice orientations and give tensor parameters, while kinetic measurements show …
The study examines the radiolysis of potassium perchlorate using electron paramagnetic resonance and optical spectrophotometry on irradiated polycrystalline samples and single crystals over low temperature and room temperature conditions. Irradiation produced several paramagnetic and optically absor…
This study examines the radiolysis of solid alkali metal chlorates under cobalt gamma irradiation, focusing on the composition, yields, and thermal stability of stable products formed from the chlorate ion. Irradiated sodium, potassium, rubidium, and cesium chlorates were analyzed for chloride, chlo…
This study examines how heterophase semiconductor oxide additives modify the radiation chemical stability of lead azide under X-ray irradiation. Polycrystalline lead azide was mixed with ZnO, CdO, NiO, or Co2O3, and radiolysis rates, gas evolution, gamma-induced emf, conductivity, and current-voltag…
The paper studies nonlinear operator equations in Banach spaces of the form F(u) plus B(u) equals a given functional, where F is monotone or strongly monotone and B is weakly continuous and orthogonal. It proves an existence theorem under reflexivity, coercivity, and hemicontinuity assumptions, and …
This study examines the high-temperature stability of synthetic fluorophlogopite and several isomorphous synthetic micas, a property for which earlier reported limits varied widely. Samples were annealed between 700 and 1300 °C for 70 to 140 hours and analyzed by continuous thermogravimetry, chemica…
This resolution summarizes the proceedings and conclusions of the Second Conference on the Study of Gold Deposits in Siberia, held in Tomsk in April 1968 with participants from academic, educational, geological, and mining organizations. It reviews the expansion of research activity since the first …
This paper characterizes limonitic formations in the oxidation zones of the Tsentralnoe, Komsomolskoe, Berikulskoe, and Natalevskoe gold ore deposits of the Kuznetsk Alatau. On the basis of field observations, microscopy, chemical analysis, differential thermal analysis, semiquantitative spectral an…
This paper discusses the use of amalgam polarography with accumulation and film polarography with accumulation as highly sensitive analytical methods for geochemical prospecting and exploration. It explains the electrochemical concentration principle that distinguishes these methods from ordinary po…
This paper evaluates potassium radiometric surveying as a lithogeochemical method for identifying ore-controlling tectonic features in the Darasun ore field. Samples from subsoil grus were analyzed by beta radiometry to estimate equivalent potassium contents, on the premise that potassium metasomati…
This article examines the subdivision and correlation of Mesozoic continental deposits filling the Balei graben, a problem of practical importance for gold ore exploration because mineralization is associated with particular stratigraphic and lithological intervals. Using oriented drill core from 23…
This paper examines the magnetic field structure of the Aprelkovo quartz sulfide gold deposit in Transbaikalia and its relationship to geological features including metamorphic rocks, intrusions, dikes, veins, and tectonic disturbances. High precision magnetometric surveys, micromagnetic measurement…
This paper examines how magnetic field structures relate to the geology of vein-type gold deposits hosted in intrusive massifs, addressing the limited basis for using magnetic surveys in detailed ore-field studies. Drawing on special investigations in several gold ore provinces, it argues that these…
This paper evaluates the potential for prospecting pyrite and gold, copper, pyrite deposits in the Northern Altai Mountains, where signs of sulfide mineralization occur in Cambrian volcanogenic terrigenous sequences. Using results from staged geological and geophysical surveys conducted in 1963 to 1…
This paper reviews the application of geophysical methods to gold prospecting in the Altai Mountains, where the search for concealed deposits has become increasingly important. Drawing on regional and detailed surveys conducted since 1960, it discusses the use of magnetometry, gravimetry, electrical…
This paper discusses an auxiliary method for prospecting blind ore deposits by studying post-ore dikes that intersect mineralized bodies at depth. Drawing on investigations of diabase-porphyrite dikes in skarn-magnetite deposits of Gornaya Shoria, it argues that magma can assimilate ore material and…
This paper presents a mineralogical and geochemical heavy-mineral concentrate method intended to improve prospecting for gold deposits, especially where gold is finely dispersed and ordinary concentrate sampling or metallometric surveying is limited. The method selects pseudomorphs of iron hydroxide…
The paper proposes a quantitative methodology for evaluating the gold ore-bearing potential of prospective areas during prognostic-metallogenic mapping. It defines an ore-bearing coefficient as the total gold in lode and placer deposits per unit ore-bearing area, compares node values with district a…
This paper examines methodological problems in the exploration of placer gold deposits in the Martaiga area, where exploration estimates often differed substantially from subsequent dredging results. Using comparisons between borehole data, control shafts, reserve contours, and mining washoff coeffi…
This paper examines the internal structure of native gold from ancient Neogene and Lower Quaternary placers in the Amur Region as a criterion for interpreting placer formation, metal transport, and sources. Using structural etching, fineness observations, and comparisons among the Yasnopolyanskaya a…
This paper reassesses the interpretation of watershed saddles and buried gold placers in the mountainous Kiya River basin of the Kuznetsk Alatau, where earlier work had linked some saddles to upper-terrace remnants of ancient river valleys. Using geomorphological profiling, terrace correlation, sedi…
This paper examines how young tectonic movements influenced gold placer formation along the eastern slope of the Kuznetsk Alatau, especially near its boundary with the North Minusinsk depression. Using observations from mined terraces, exploratory workings, karst pockets, and vertical electrical sou…
This paper examines how Late Quaternary arid-climate geomorphic processes influenced the formation of gold placers in the eastern Kuznetsk Alatau. It argues that active deflation, denudation, sheet wash, and the subsequent filling of deflation hollows created distinct conditions for placer developme…
This paper examines whether Quaternary gold placers in the modern drainage network were formed mainly by contemporary alluvial processes or by the reworking of older placer material. Using the southern margin of the West Siberian Lowland and adjacent mountain areas as a case study, it compares the M…
This paper examines the genetic and spatial relationships between gold ore deposits, secondary dispersion halos, and valley alluvial placers in Northeastern Transbaikalia. Using regional geological observations, granulometric data on gold from ores, halos, and placers, and evidence from Lower Cretac…
This paper examines the relationship between primary gold sources and associated placer deposits in the Kuznetsk Alatau, where depletion of many placers has made ore prospecting increasingly important. Using geological and placer-mineralogical observations, it distinguishes several source types, inc…
This paper examines the structural controls on gold mineralization at the Kochkar gold-arsenic deposit in the Southern Urals, based on mine workings at 200 to 350 m and boreholes reaching 800 to 900 m. It argues that, in addition to previously recognized fracture systems, the deposit is governed by …
This paper examines the structural setting, magmatic associations, alteration history, and ore genesis of the Mnogovershinnoe gold deposit on the coast of Sakhalin Bay. It argues that gold mineralization is related to a Paleogene to Upper Cretaceous volcano-plutonic complex and was localized at the …
This paper examines the spatial and genetic relationship between gold, silver, and mercury mineralization at the near-surface Oganchinskoye deposit in Kamchatka. On the basis of mineral associations, vein relationships, and textural observations, it reconstructs a multistage hydrothermal process in …
The paper examines the geological structure, tectonic setting, and mineralization sequence of the Itatka gold ore deposit in Eastern Transbaikalia, located within the gold and molybdenum belt near the Aldan Shield. It describes the Archean metamorphic basement, Proterozoic and Mesozoic intrusive com…
This paper examines the structural controls on gold mineralization at the Lyubavinskoye deposit in Central Transbaikalia, situated within a fractured zone associated with a deep basement fault. On the basis of geological mapping, underground observations, vein morphology, mineral associations, and f…
This paper reassesses gold mineralization in the Mama River basin of northwestern Cisbaikalia in light of recent prospecting and mapping that identified significant primary occurrences. It argues that gold mineralization is controlled regionally by structures related to the Abchad deep fault and loc…
This paper characterizes the geological setting and controls on gold-bearing quartz veins in the Irokinda-Kindikan ore field of the South Muya block. Based on structural, lithological, and mineralogical observations, it describes Archean metamorphic host rocks, intrusive complexes, fold and fault sy…
This paper characterizes endogenous gold ore mineralization in the Paleozoic basement of southern Tomsk Oblast, within the Tomsk uplift and adjacent folded zones. Using field observations, heavy mineral concentrate sampling, assay data, borehole evidence, and structural interpretation, the authors d…
This paper examines the structural controls of the Lebed skarn gold deposit within the Kondom Lebed mobile zone, focusing on the relation between the Maiskii intrusive massif, its contact structures, skarn formation, and gold mineralization. Using large scale geological and micromagnetic surveys, fr…
This paper examines how the contact surface between Lower Cambrian limestones and Middle Cambrian porphyrites influenced the localization of commercial gold mineralization in steeply dipping veins at the Berikul ore field. Using observed spatial relations between ore contours, contact dip, and fract…
This paper examines the structural controls on gold mineralization in the Berikul ore field of the Kuznetsk Alatau using evidence from expanded exploration and mining data. It reconstructs successive pre-ore, ore, and post-ore tectonic stages, emphasizing the role of post-folding rupture systems, di…
This paper evaluates criteria for the downward persistence of gold mineralization in the Berikul ore field of the Kuznetsk Alatau. Using structural observations, mineral paragenesis, thermoluminescence of vein quartz, and thermometric study of gas, liquid inclusions, the authors relate mineralizatio…
This paper examines structural controls on the localization of gold ore shoots at the Darasun deposit, where mineralization occurs discontinuously within veins hosted by curved joint fractures. Using mine plans, sampling data, and constructed contour relief maps of vein planes, the author argues tha…
This paper refines the geological concept of an ore shoot using statistical analysis of gold grade distributions from several Kazakhstan gold deposits. The authors argue that economic grade-based definitions are insufficient for geological and geochemical interpretation, and propose treating ore sho…
This paper examines the distribution of Upper Paleozoic magmatic and gold-bearing ore formations in the Kalba gold-ore belt of the Zaysan folded region. It argues that ore localization is chiefly controlled by structural factors, especially junctions of northwestern and sublatitudinal faults, where …
This paper examines the structural controls on endogenous gold deposits in Northern Kazakhstan, focusing on the Bestyube, Dzhelambet, Aksu, and Stepnyak deposits hosted by deformed Ordovician sedimentary and volcanogenic sequences. Using evidence from detailed geological mapping, exploration data, a…
