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 paper develops a methodology for choosing drilling regimes that maximize mechanical drilling rate while respecting limits imposed by bit-cutter strength, tool wear, drill-string behavior, and available power. Using theoretical and experimental relations for cutter penetration, axial pressure, c…
This paper summarizes the use of semiconductor thermoresistors as temperature sensors for determining the temperature of measuring wires, emphasizing their high sensitivity, small size, low thermal inertia, stability, and suitability for remote measurement. It presents the exponential temperature de…
Based on profile core drilling along a 250 km Vereshchagino section of the Yenisei River, this paper describes the Paleozoic basement and Mesozoic to Cenozoic cover of the northeastern West Siberian Lowland in the Turukhansk region. The study uses lithological comparison, spore-pollen assemblages, l…
This paper examines how anisotropy in rocks affects drilling behavior and proposes a simpler way to estimate elastic anisotropy without direct determination of Young’s modulus. Using theoretical relations among thermal conductivity, thermal diffusivity, sound velocity, and elastic modulus, it argues…
This paper examines the definition and morphological classification of nickel-bearing weathering crusts in the Urals, especially those associated with hyperbasites and carbonate contacts. Building on Soviet work on weathering crusts, it argues for distinguishing broad and narrow meanings of the term…
This paper examines the spatial relationship between hypergene nickel mineralization and elements of the river network, especially latitudinal valley segments that may reflect inherited tectonic structures. Drawing on examples from the Urals, Ukraine, Kazakhstan, Western Siberia, Salair, and related…
This paper examines changes in rock-forming and accessory mineral assemblages where the younger Turochak granite intrusion contacts the dioritoids of the Ulmen massif in Gorny Altai. Using systematic sampling away from the contact in both intrusions and heavy-mineral counts by the track method, the …
This paper characterizes amphiboles from the contact metasomatic formations of the Ampalyk deposit, where they occur in hornfelses, skarns, ores, and as products of pyroxene decomposition. Using optical observations, chemical and spectral analyses, X-ray structural data, and crystal chemical recalcu…
This commemorative profile marks the fiftieth birthday and twenty-fifth year of professional and scientific-pedagogical activity of Stepan Stepanovich Sulakshin, head of the Exploration Techniques Department at TPI. It outlines his education, wartime service, postgraduate training, and long institut…
This paper reports laboratory experiments on carbide drill bit designs intended to improve the productivity of core drilling in geological exploration boreholes. Using a ZIF-75 drilling rig with dynamometric recording, the authors tested sandstone drilling with varying cutter numbers, cutter rake an…
This paper addresses the calculation of the static hoisting force required to extract a drill-pipe string from a smoothly curved, plane directional well. By resolving the weight of an elementary pipe segment into axial and normal components and incorporating wall friction, it derives a simplified ex…
The paper addresses the calculation of a bed’s true thickness from its apparent thickness as measured in a borehole, a problem complicated in earlier treatments by the use of multiple formulas and intermediate angular quantities. It derives a single trigonometric expression using the apparent thickn…
This paper addresses the problem of maintaining and changing the prescribed trajectory of geological exploration wells, noting limitations of existing deflection devices such as interruption of drilling, restriction to zenith-plane correction, complex orientation, or unreliable anchoring. It describ…
This paper examines methodological problems in exploring deep horizons of Kuzbass coal deposits, especially where upper horizons have already been mined and detailed geological information is available. Using materials from the Prokopyevsk and Kiselevsk district, including mine documentation, seam m…
This paper proposes a downhole drilling hydraulic unit intended to overcome limits of conventional rod drilling, including rod strength, rotational energy losses, vibration, and core jamming. Drawing on theoretical and experimental investigations, it outlines a system comprising a hydraulic motor, s…
This paper describes a redesigned hinged deflector for sidetracking wells, addressing field shortcomings of an earlier tool whose initial drilled cup was too shallow to ensure reliable core breakage and subsequent assembly entry. The authors outline the deflector’s operation and present a modificati…
This paper examines azimuthal deviation of inclined boreholes and argues that rotation alone cannot explain observed patterns, including changes with zenith angle and leftward deviation during roller-cone drilling. Building on earlier work on zenith curvature, it analyzes how anisotropy in rock mech…
This paper synthesizes geophysical investigations conducted from 1932 to 1962 in the northern Anzhero-Sudzhensk district of the Kuznetsk Basin and adjacent areas, where coal exploration is complicated by complex Paleozoic structures and thick Meso-Cenozoic cover. Comparing seismic, electrical, magne…
This paper reports an experimental micromagnetic survey at a gold ore deposit in the Mariinsky taiga, where earlier geophysical methods had been ineffective and the fracture structure was poorly understood. Measurements on dense grids across 117 small sites are compared with trench exposures to asse…
This paper addresses the interpretation of magnetic anomalies produced by bodies with finite dimensions, especially the errors introduced when three-dimensional fields are treated using two-dimensional methods. It develops quantitative correction coefficients for vertical thin beds and cylindrical b…
This paper reassesses the stratigraphic position and age of the Elan horizon of the Siberian Platform and the Obruchev horizon of the Sayan-Altai region, a problem closely tied to defining the lower boundary of the Middle Cambrian. Using lithological relationships and trilobite and archaeocyath faun…
This paper reports the discovery and preliminary description of previously unrecognized carbonate formations with archaeocyaths in the Murtuk area of the northwestern Eastern Sayan, lying below the Lower Cambrian Kolba carbonate sequence. Based on detailed geological mapping and fossil collection, t…
This article critiques the use of Plato’s Atlantis narrative as evidence for the geological hypothesis of continental subsidence. Through textual analysis of the Timaeus and Critias, comparison with ancient geographical terminology, and discussion of archaeological and geological data, Pukhlyakov ar…
This paper examines tectonic fracturing of coal seams and enclosing rocks in the Leninsky district of Kuzbass, a block-structured area of gentle folds and major thrust faults. Using mine, open-pit, borehole, and stereographic data from about 20,000 fracture surfaces, it distinguishes normal-cutting …
This paper reexamines the stratigraphic scope of the Erunakov Formation in the Erunakov and Tersin districts of the Kuznetsk Basin, especially the relation of its stratotype sections and the position of the Tailugan subformation. Using geological mapping, tracing of marker horizons, facies-cyclic co…
This paper examines the relationships among metamorphic rocks of the Dzhebash Formation, granitoids of the Kogdar massif, and ultrabasic intrusions in the Yenisei to Oya interfluve of the Western Sayan. Using field relations, petrographic observations, facies analysis, and chemical comparisons, the …
This paper reexamines the position and character of the Tomsk thrust along the northwestern margin of the Kuznetsk Basin, where earlier interpretations treated it as a major nappe placing Devonian rocks over coal-bearing deposits. Using recent gravimetric observations, comparisons with geological ma…
This paper examines the debated tectono-stratigraphic relationship between the Anastasiya and Ungut sequences in the middle Mana River area of the northwestern Eastern Sayan. On the basis of detailed geological mapping in the Maly Ungut and Semyon Rock areas, it analyzes bedding relations, fold geom…
This paper revises the Devonian stratigraphy of the central Mariinsk taiga in the Kuznetsk Alatau, focusing on sedimentary and volcanogenic formations in the middle Kiya River basin and adjacent tributaries. Using geological mapping, measured sections, lithologic comparison, structural observations,…
This paper revises the stratigraphy of pre-Devonian deposits in the northeastern Mariinsk Taiga of the Kuznetsk Alatau, where earlier schemes disagreed on the Cambrian boundary, unit succession, and ages. On the basis of reference sections, medium-scale geological mapping, detailed study of key area…
This paper examines why supergene nickel mineralization in the Ural hyperbasite weathering crust is confined to particular parts of otherwise regionally developed ultrabasic rock belts. Using mapped examples from several Ural districts, it argues that transverse latitudinal and sublatitudinal struct…
The paper addresses methods for engineering-geological mapping in West Siberian areas where loess rocks form common foundation soils and industrial construction requires practical planning data. Drawing on mapping experience in Tomsk Oblast and analysis of earlier geological and engineering-geologic…
This paper examines the statistical method for calculating oil reserves under conditions of naturally declining well production. It critiques existing procedures for constructing logarithmic correlation tables and estimating the production change coefficient, emphasizing the distortions introduced b…
This paper evaluates the overall stability of the planned wall of the First Barandatsky open pit at the Itatskoye brown-coal deposit, where large-scale open-pit mining was projected. Using engineering-geological data on rock composition, density, cohesion, and internal friction, the authors compare …
This article presents a simplified method for determining reservoir pressure in oil and gas formations from pressure buildup data after well shut-in. Building on Chekalyuk’s analytical treatment of continuing inflow and Bogachev’s simplified integral approach, it derives calculation formulas for oil…
This paper reassesses the petroleum potential of the central Sikhote-Alin synclinorium, an area previously regarded as unfavorable because its thick Triassic, Jurassic, and Cretaceous sedimentary rocks are locally intruded by dikes. It reviews reported gas inflows, bitumen occurrences, tar-like sand…
This paper examines the geological structure of the Borisov anticlinal uplift within the Suifun synclinal zone and evaluates its possible oil and gas significance. On the basis of structural drilling, seismic profiling, gravity data, and new well evidence, it revises an earlier interpretation of the…
This paper examines whether small wellbore deviations in the Alexandrovsk oil exploration expedition, northern Tomsk Oblast, can be ignored when constructing structural maps. Using rectangular coordinate calculations and depth corrections for curvature based on measured zenith angles and azimuths, t…
This paper examines the distribution, abundance, and morphology of accessory minerals in injected schist xenoliths and their enclosing granitoids in the Kamensky massif of Rudny Altai. Using heavy mineral separates from sectioned samples, the study identifies zircon, apatite, monazite, magnetite, il…
This paper reports the results of large-scale geological surveying in the upper Tom and Terensu river basin of the Kuznetsk Alatau, where sedimentary-stratal and epigenetic-karst phosphorites were identified in Upper Proterozoic and Lower Cambrian formations. It describes the stratigraphy, structure…
This paper summarizes new geological, petrographic, and technological data on nepheline rock massifs of the Kuznetsk Alatau, including newly recognized bodies and revised interpretations of previously known ones. It describes the occurrence, zoning, mineral and chemical composition, tectonic setting…
This paper characterizes young mineral neoformations observed in mine workings of the Tsentralnoye quartz sulfide deposit in the Kuznetsk Alatau. It describes reddish brown ferruginous gels and rarer white precipitates, using field occurrence, microscopy, spectral and assay analyses, and comparison …
This article examines plastic deformation as a major source of crystal imperfection in minerals, emphasizing slip processes produced by compression, tension, and torsion under tectonic conditions. Drawing on morphological observations and prior studies of micas, gypsum, rock salt, galena, antimonite…
This paper examines epigenetic crystal imperfections that arise after mineral formation, especially during polymorphic transformations, metamictization, and the decomposition of solid solutions. It argues that metamict states in minerals such as titanoniobo-tantalates, zircon, and thorite can repres…
This article examines epigenetic crystal imperfections that arise after crystal formation as a consequence of changing physicochemical conditions and polymorphic transformations. Through examples including diamond and graphite, sulfur, tin, boracite, quartz, leucite, titanates, iron sulfides, and am…
This paper examines the origin of imperfections in real crystals, with particular attention to defects that arise during crystal growth. It argues for a broad use of the concept of dislocation to include disturbances of crystal homogeneity produced both during formation and during later physical and…
This paper examines the Lower to Middle Devonian volcanogenic Telbes Series in the Talanovsky graben on the northwestern slope of the Kuznetsk Alatau, based on geological mapping and petrographic, chemical, stratigraphic, and tectonic observations. The authors subdivide the formerly undifferentiated…
This paper examines the dike complex of the Kommunar gold ore field in Khakassia, located near the Solgon granodiorite massif on the eastern slope of the Kuznetsk Alatau. Using detailed geological and structural mapping, petrographic description, petrochemical diagrams, mineral optical data, and tra…
This paper examines metasomatic amphiboles associated with albitized rocks and skarn magnetite formations in the Kommunar mine area of Khakassia. Using field relationships, petrographic observations, chemical analyses, optical properties, X-ray data, and crystallochemical formula calculations, it ch…
This paper presents a comprehensive petrographic, mineralogical, geochemical, and geophysical characterization of the Kolodzhul granitoid stock in Khakassia, a small oval adamellite massif previously assigned inconsistently to neighboring intrusive complexes. Based on field relations, modal mineral …
