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Date submitted1933-07-05
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Date accepted1933-09-10
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Date published1934-01-01
Contemporary ideas about the tectonics of Central Asia
- Authors:
- D. I. Mushketov
None of the problems of the geology of Central Asia, both theoretical and deeply practical (metallogeny and its zones, distribution of coal-bearing and oil-bearing formations, mineral waters, gases, seismicity and much more) can be satisfactorily resolved without knowledge of not only the tectonics of the region, but also the basic regional tectonic concepts. After a critical review of all the material accumulated in large quantities for 60 years, and especially during the last 10 years, on the geology of Central Asia, the author comes to some basic conclusions that have affected his earlier ideas (see article).
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Date submitted1933-07-08
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Date accepted1933-09-24
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Date published1934-01-01
Parasitic craters that appeared in 1932 at the foot of Klyuchevsky volcano in Kamchatka
- Authors:
- V. S. Kulakov
In the summer of 1932, it was known about the formation of a parasitic crater at the foot of the Klyuchevsky volcano. Upon arrival in Petropavlovsk, it turned out that a second parasitic crater had formed there, which at that moment was in activity. The work plan was changed, and the author immediately went to the Klyuchevsky volcano. New parasitic craters formed in the town of Kirgurich. From the village of Klyuchi they are located 16 kilometers S, and 20-25 kilometers NE from the top of Klyuchevsky volcano. In total, two craters appeared. The first is named Kirgurich, after the name of the area, the second is Tuila. Kirgurich is located near the end of the birch forest zone at altitude. high no higher than 600 m. Tuila arose later than Kirgurich and is located to NHE 1300 m from it at abs. high 500-530 m. But abs. marks among all the parasitic craters E and N of the Klyuchevskaya slope, the new craters are located the lowest. New parasitic craters are located on the same line with the Kharchinsky and Zarechny volcanoes, on the one hand, and old parasitic craters located S from the new ones, on the other. On this line, the new craters are closest to the old parasitic craters.
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Date submitted1933-07-03
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Date accepted1933-09-26
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Date published1934-01-01
On the Carboniferous stratigraphy of the Central Chernoziem Region
- Authors:
- V. N. Tikhii
The material for this work was the data from 18 exploratory drilling wells laid by the Geological Exploration Trust of the Central Black Sea Region in the south-eastern part of the region and along its border with the North Caucasus Territory, which encountered known carboniferous rocks. The importance of studying Carboniferous stratigraphy within the Central Black Sea Region is determined by the geographical location of the region between the Donetsk and Moscow Region coal basins. Thus, the northernmost well in the area of our study, in Novy Oskol, is 240 km from the extreme southern outcrops of the Moscow Carboniferous, and 200 km from the extreme northern Donetsk (see article). Thus, the described Carboniferous deposits are a connecting link between these basins, which were filled with facies of completely different deposits - and which, from the hitherto dominant point of view, represented the results of fundamentally different geological processes.
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Date submitted1933-07-29
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Date accepted1933-09-05
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Date published1934-01-01
The oldest known Tetrapoda
- Authors:
- A. N. Ryabinin
The present work of G. Säve-Söderbergh, despite its modest title: “Preliminary note on Devonian stegocephalians from eastern Greenland,” sets out the contents of a very interesting study devoted to the description of finds of the oldest Tetrapoda known to date. It should be said that the discovery of reliable remains of them in the Devonian has long been eagerly awaited in the scientific world. The author was a member of the Danish East Greenland Expedition of 1931, which worked under the leadership of Dr. Lauge Koch and discovered the fauna of lobefins and other fishes in the Upper Devonian (layers of the upper red sandstone in the area of Mont Celsius on Ymer Island at 73° 10' N). . and 23° west longitude). The accuracy of age determination is certified by the works of the famous Swedish scientist E. Stenslö (see article).
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Date submitted1933-07-14
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Date accepted1933-09-09
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Date published1934-01-01
Challenges that surveying is facing
- Authors:
- I. M. Bakhurin
In connection with the plan and pace of development of mining and geological exploration, the survey department is currently facing a number of important tasks, namely: A. Technical reconstruction and technical revolution 1) Elimination of technical backwardness (introduction of a unified coordinate system, guarantees against gross errors, introduction of the “Z” coordinate, etc. 2) Increasing survey accuracy (accuracy of measuring angles, lengths, orientation, etc. 3) Introduction of new survey methods and business techniques (precise tacheometry in the mine, photomechanical reproduction of plans and other documents, the use of photogrammetry to survey open-pit works, etc. 4) Adaptation of surveying technology to the new pace of mining (consoles, hanging theodolites, new orientation methods. B. Adaptation of mine surveying to serve planned construction (see article). B. Regarding general and organizational issues (see article).
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Date submitted1933-07-15
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Date accepted1933-09-02
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Date published1934-01-01
Position line and point position error
- Authors:
- N. G. Kell
The general theory of position lines and gradients provides greater clarity and simplicity in matters of graphical adjustment and determination of point position errors. In geodesy, when determining the position of the required points on a plane, we directly measure horizontal angles and distances, which can be considered as a function of two variables (coordinates). This measured value of the function corresponds to a certain geometric location of points on the plane - a certain line, which we call the line of position. Let's move on to the point position errors. The position of the projection of a point on the horizontal plane is determined by the intersection of two lines of position of two measured functions. Graphic adjustment using gradients is very useful for repeated trigonometric determinations of moving points, for example in landslide areas, in areas subject to displacement from underground mine workings, etc. Once constructed, the error figure with the found gradients will serve as a convenient means for further studies of the movement of the determined point.
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Date submitted1933-07-11
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Date accepted1933-09-11
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Date published1934-01-01
Classification, nomenclature and symbolism of 32 types of crystallography symmetries
The classification of 32 types (or groups) of crystal symmetry, i.e., the basis for dividing them into systems, or systems, can be based on various principles. Of these principles, the following two are the main and most natural. It is possible to classify the types (or groups) of symmetry, i.e., certain spatial collections of symmetry elements as such, by themselves, without relation to the complexes of possible faces and edges of the crystal to which these types of symmetry are characteristic. Let us call such classifications “purely geometric”. It is possible to classify the types of symmetry, taking into account the properties of those complexes of possible faces and edges of the crystal, in other words, those spatial lattices to which these types (groups) of symmetry are characteristic. Let us call such classifications “crystallographic”. The proposed classification, nomenclature and symbolism are closely linked by a single principle and are entirely based on a genetic trait — on the generative elements of symmetry.
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Date submitted1933-07-11
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Date accepted1933-09-18
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Date published1934-01-01
Ways of development of crystallography and its modern tasks
- Authors:
- V. V. Doliovo-Dobrovol'skii
(Report read on March 11, 1933 at a meeting of the departments of petrographic-mineralogical cycle of sciences, dedicated to the 50th anniversary of the death of Karl Marx). The history of crystallography, its main trends and recent achievements are presented in a brief and reference form. This base serves for the study of crystallographic problems that are largely solved according to industrial requirements. Modern period and tasks of crystallography (see article). We can distinguish groups of problems: a group of physical problems connecting the physics of phenomena with their geometry; group of chemical problems; a group of problems related to physical and chemical phenomena."
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Date submitted1933-07-18
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Date accepted1933-09-24
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Date published1934-01-01
Comparison of the real structure with the Fedorov installation of zircon crystals
- Authors:
- I. I. Shafranovskii
The method of calculating network densities, previously used in crystal chemical analysis, gives results that do not coincide with the results for the real structure, due to the fact that we are dealing not with one, but with several parallelepipedal systems of points inserted into each other. This circumstance was already noted by E. S. Fedorov himself in his article “On the question of determining the density of atoms in the faces of crystals.” However, Fedorov’s method for calculating grid densities can be used not only for individual parallelepipedal lattices, but also in the presence of a structure that forms lattices similar to the above-described “pseudo-octahedral” one, to calculate geometric atomic grid densities.
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Date submitted1933-07-30
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Date accepted1933-09-06
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Date published1934-01-01
Pyramidal but prismatic habit crystals of tin stone from East Transbaikal
- Authors:
- I. Yu. Ikornikova
- E. A. Sevrugina
The study of pegmatite deposits of tin stone from East Transbaikal gave a number of results indicating a connection between the form and genesis of this mineral. A number of cassiterite crystals found in pegmatite veins confirm the connection of pyramidal crystals with high-temperature formation conditions. The described high-temperature crystals of tin stone from the Zavitinsky deposit were of interest, having a prismatic appearance that is characteristic of low-temperature pegmatites. Measurements of a single crystal showed that it is a dipyramid with angles between the normals to the faces of the dipyramid equal to 58°16'. "Fedorovsky Institute"
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Date submitted1933-07-03
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Date accepted1933-09-18
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Date published1934-01-01
Basic mechanical characteristics of some iron ores of Krivoy Rog and their enclosing quartzites
- Authors:
- V. V. Chernyavskii
This experimental work was undertaken to determine the basic mechanical characteristics of iron ores and the enclosing quartzites of the Leninskii (formerly Kolachevskii) mine in the Krivoy Rog region. The experiments made it possible to establish: 1) Independence of the forms of destruction of rock cubes solely from the nature of the linings. 2) Delay of compressive deformation at high loads. 3) Almost complete proportionality between elastic deformation and stresses for most samples at specific loads above 50-150 kg/cm and some violation of this rigor at lower loads, which is generally consistent with the above-mentioned conclusions of E. E. Woo. 4) Establish the constancy of Poisson's ratio with increasing load and determine its value for iron ore and quartzite using a special modification of the Martens mirror device. 5) Note the excess of the remaining transverse deformations over the elastic ones and the excess of the elastic ones over the remaining ones in the compression direction.
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Date submitted1933-07-15
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Date accepted1933-09-10
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Date published1934-01-01
Magnetic field of electromagnetic separators M. V. N. 6 (with ring magnets) and M. D. 4 (with reversible magnetic poles) and the theory of calculation of electromagnetic systems of separators of these types
- Authors:
- A. Ya. Sochnev
This article is the first attempt to create a theory for calculating electromagnetic systems from magnetic separators. At the beginning of the article, the general principle of the theory based on the experimental study of the magnetic field is described, and the general information necessary for constructing this theory is given. Below are the results of a study of the magnetic field of the M.B.N.6 separator (with ring magnets) and a formula for determining the magnitude of the magnetic force at various points in the field. Using the law of mechanical similarity, the resulting formula becomes common for all cases of any separator of the type under study (with ring magnets). This generalization makes it possible to set conditions for determining the optimal values of the parameters that determine the magnetic field of a separator of a given type and the number of ampere-turns in the separator coil.
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Date submitted1933-07-04
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Date accepted1933-09-27
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Date published1934-01-01
On the use of a synchronous motor as the main motor in the system of the motor generator set with flywheel suitable to the mining hoist according to the system of Ilgner-Leonard
- Authors:
- F. N. Shklyarskii
The use of a motor-generator set with a flywheel (Ward-Leonard-Ilgner) as the main motor of a synchronous motor is dictated by the presence of a hydraulic coupling connecting the main motor shaft to the shaft on which the alternating voltage is located. Dynamo and flywheel installed. This clutch replaces the automatic flywheel slip controller, which operates at a constant speed of the synchronous main engine. This article describes the installation of a fluid coupling, as well as the idea of using it in a Ward-Leonard-Ilgner system with a synchronous main motor.
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Date submitted1933-07-07
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Date accepted1933-09-16
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Date published1934-01-01
The role of transition resistance in the phenomenon of hydrogen overvoltage
- Authors:
- P. P. Porfirov
In this work, we used a method of direct measurement of the magnitude of the transition resistance, as well as the thickness of the gas film creating it, using an alternating current superimposed on a polarizing direct current. This work allows us to draw the following conclusions: 1) the existence of transition resistance on the mercury cathode is undoubtedly, transition resistance is not the only cause of hydrogen overvoltage; 2) the formation of a hydrogen film, which gives the transition resistance, begins at very low cathodic polarization; 3) the maximum film resistance corresponds to the beginning of an increase in current strength on the current density - potential curve; 4) as the direct current density increases, the value of the transition resistance decreases.
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Date submitted1933-07-23
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Date accepted1933-09-28
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Date published1934-01-01
On the issue of expanding this function into a series in Jacobi polynomials
- Authors:
- M. I. Akimov
The purpose of this note is to simplify the method proposed by academician N. M. Krylov for constructing a given function in the form of a series acting in Jacobi polynomials. By forming an a priori expansion with uniform and absolute convergence, we show, without relying on the Riesz-Fischer theorem, that it can be identified with expansions in Jacobi polynomials.
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Date submitted1933-07-03
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Date accepted1933-09-03
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Date published1934-01-01
About Kronecker's intergral
- Authors:
- A. Zhuravskii
In his in-depth studies on functions of many variables, Kronever showed that the question of determining the number of roots of a system of algebraic equations (see article) satisfying a certain condition is related to determining the value of the integral. The criteria for the multiplicity of solving a system of equations that algebra possesses seem complex. It is natural to look for simpler techniques. Our research shows that this can hardly be achieved by applying the Cronever integral without profoundly changing its structure.
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Date submitted1933-07-04
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Date accepted1933-09-17
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Date published1934-01-01
On one case of the limit theorem of probability calculation
- Authors:
- A. Kazanskii
This work refers to the consideration of the case of a limit theorem with respect to independent variables - a case that was developed by academicians Markov and Lyapunov, as a result of which the Lyapunov conditions known in science were obtained. Further work on the issue under consideration was reduced mainly to the development of new methods for proving the theorem on the limit of probability and did not yield a significant expansion of Lyapunov’s conditions. Therefore, it is natural to pose and try to solve the problem of extending the Lyapunov conditions, which is what this work is devoted to.
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Date submitted1933-07-10
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Date accepted1933-09-17
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Date published1934-01-01
Stresses in an insulated sphere
- Authors:
- B. Lunin
We consider an ideally elastic sphere, the material of which is subject only to the force of attraction of its mass. Then it is assumed that the sphere has an incompressible core. Assuming that the thickness of the shell is small in relation to the radius of the core, we obtain a formula for stresses in meridional sections, previously obtained by different authors (including Academician Bynnik) for completely different assumptions.
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Date submitted1933-07-07
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Date accepted1933-09-04
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Date published1934-01-01
On some dynamics problems related to mining and processing
- Authors:
- N. P. Neronov
Let us limit ourselves to considering a ball mill, consisting of a cylindrical drum with a horizontal axis of rotation and loaded with a mixture of balls and ore. The motion of a ball in a ball mill can be divided into three periods. During the first period, the ball has no relative motion with respect to the rotating drum and moves, being, as it were, invariably connected with the latter. In the second period, the ball is separated from the wall of the drum, but still continues to rest on the underlying ball, moving along the latter. Finally, the third period begins from the moment the moving ball leaves the lower one. Studying the movement of the ball during the first and third periods does not encounter any difficulties. Therefore, only the second period is the subject of further research. The considered movement of the ball occurs in a vertical plane perpendicular to the axis of rotation of the drum.
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Date submitted1933-07-05
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Date accepted1933-09-27
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Date published1934-01-01
On one case of irrotational continuous flow of an infinite plane flow around an algebraic contour
- Authors:
- N. P. Neronov
Previously, I considered the question of the motion of an ideal incompressible fluid in the presence of a stationary cylindrical solid body, which is relevant to the outline of airplane wings. In this case, the streamlined contour is assumed to be algebraic and the velocity of the fluid at an infinitely large distance from the solid body is constant in magnitude and direction. At infinity, the speed of an ideal incompressible fluid is constant in magnitude and direction. In this paper we show that applying the conformal transformation mentioned above results in an obstacle contour representing an algebraic curve of order 2m (see paper).
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Date submitted1933-07-11
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Date accepted1933-09-30
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Date published1934-01-01
Geodetic and surveying work of the Berezovskii district "Uraltsvetmetzoloto" in 1931.
- Authors:
- V. K. Yuzefovich
This article contains a description, a complex of geodetic and surveying work on the creation of a network of trigonometric and polygonometric main points on the area of the Berezovskoe field and the transfer of topographic surveys. The Berezovskoye field, with its administrative center as part of the Berezovskii plant, is located 12 km northeast of Sverdlovsk in a wooded area near the Pyshma River. Gold deposits are part of beresites, especially aquifers. This caused great difficulties in coordinating surveys of trunks and choosing the type of underground sources. The enclosed area required a very complex connecting network and the construction of high signals. In parallel with the construction of the network, preparatory work was carried out to draw up a master plan for the deposits with mining and geometric analysis; this work consisted of studying the archives and incorporating the network of old points into the new network.
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Date submitted1933-07-26
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Date accepted1933-09-01
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Date published1934-01-01
About the discovery of cobalt in the Nikitinskii mine (Turinskii group) and molybdenum in the Dashkesan cobalt deposit
- Authors:
- I. V. Demin
The mineralographic method applied to the ores of the Nikitinskii mine revealed a mineral very similar to pyrite, but some of its features, such as its pink tint, prompted us to subject it to special research, and then we came to the assumption that it could be cobaltine (CoAsS). In addition to cobalt, the mineral slides contained chalcopyrite, pyrite, pyrrhotite and a non-metallic mineral. The presence of cobalt is of great importance, since pyrite and pyrrhotite are common in the Turin copper deposits and almost always follow the copper ores. When studying the collections of the Dashkesan cobalt deposit, molybdenite (MoS₂) was discovered in two samples of cobalt ore. Molybdenite in these samples occurs only in the contact between cobaltine and magnetite, in places forming thin veinlets with a thickness ranging from fractions of a millimeter to 3-4 mm; sometimes molybdenite is in a disseminated state. The discovery of molybdenite at the Dashkesan cobalt deposit required a detailed study of the collected material to determine the possibility of excavation both in the cobalt deposit and within it.
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Date submitted1933-07-22
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Date accepted1933-09-03
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Date published1934-01-01
To the study of chromium iron ore deposits
- Authors:
- A. G. Betekhtin
In this article, the author makes an attempt to present in general his views, on the one hand, on the methodology for studying chromium deposits in the most general form, and on the other, on the geological nature of these deposits. The author himself has been involved in the study of predominantly Ural platinum-bearing chromium iron ores. For identification purposes, non-platinum-bearing chromites were also studied at the same time.The latter were studied in more detail in Transcaucasia (in the area of Lake Gokcha), as well as in the North Caucasus (in the area of the Bolshaya Laba River). We can outline the following genetic types of chrome spinels formations: 1) chrome spinels formed in an earlier magmatic period; 2) accumulations of chromespiedids formed in a later igneous period, when the main mass of the host rocks was almost formed; 3) chrome spinels formed by hydrothermal processes, mainly during serpentinization of rocks. Leningrad, Fedorov Institute of Crystallography, Mineralogy, Petrography and the Study of Ore Deposits.