Determination of the bashkirian-Moscovian boundary in the volga region via conodont species declinognathodus donetzianus nemirovskaya

The selection of the global biomarker of the lower boundary of the Moscovian stages is one of the pressing issues of Carboniferous stratigraphy. Several solutions are suggested for this problem: Diplognathodus ellesmerensis Bender, Streptognathodus expansus (Igo & Koike) and Idiognathoides postsulcatus Nemirovskaya. The conodont species Declinognathodus donetzianus Nemirovskaya is one of the most prospective. It was detected in the rock sections of west Europe, the Donets Basin, the Moscow Syneclise, south Ural and the Appalachian Basin. The Volga region is also one of the places where Declinognathodus donetzianus Nemirovskaya is often met and this article is dedicated to detailed analysis of this species. © Cambridge University Press 2014

The modeling of industrial entity's dynamics staff costs

This article is devoted to a necessity of perspective value of staff costs in according to strategic business principles. The scientific and practice aspects of modeling of trends of changing staff costs of industrial entity are researched. The possibilities of models of time domain applying are estimated. The using of additive models such as moving average, smoothing fluctuations and sharing out the main trends of staff costs dynamics and also the model of exponential smoothing considering various value of a temporary row are reviewed. The appointment and features of each type of numerical modeling of staff costs level are allocated. The possibilities of applying of models of time domain for the perspective estimates of staff costs of industrial entity for forming analytical information for goals of making management decision are considered

New data on conodonts from the Kasimovian Stage of the Usolka section, southern Ural Mountains

© 2015, Pleiades Publishing, Ltd. Conodonts from the Moscovian–Kasimovian boundary beds of the Usolka section (southern Ural Mountains) are studied. Morphological features of conodont elements are analyzed and the main taxonomically significant characters of conodonts from the Moscovian–Kasimovian boundary are revealed. These characters are intended for the establishment of reliable determination of index species of the lower boundary of the Kasimovian Stage of the International Stratigraphic Chart. The most promising species marking this border is apparently “Streptognathodus” subexcelsus Alekseev et Goreva

Geomorphological, geological and mineralogical evidences of impact origin of the Rabiga-Kul Lake Basin, Republic of Tatarstan

Isometric shape of the lake Rabiga-Kul, the ratio of its diameter and depth, the presence of the surrounding rim, the discoveries of cosmic matter in Quaternary sediments testify in favor of the impact origin of the lake basin on the border of the Pleistocene and Holocenc. By means of microprobe analysis the microparticles of a size up to 20 nm were found. They consist of the native metals: iron, Nickel, tungsten, zinc; microspheres of magnetite, wustitc, troilit, intermetallics, similar to those occured at the well-known astroblemes on the Earth were found. The minerals of technogenic (?) origin, arc also present, the formation of which may be associated with the metallurgical production of the XI-XIII centuries around the ancient city Bolgar

Traditional and precision methods for studying porous space of oil-bearing formation

At present, the coefficient of porosity is traditionally determined by the method of Preobrazhensky and by the results of a petrophysical interpretation of well log data. However, there are many examples of the significant error in its determination, which ultimately affects the determination of their filter-capacitance properties, the recovery rate of oil and extracted reserves. In this paper, the porosity coefficients are compared by traditional and precision methods for oil-containing terrigenous reservoirs of the Paschian (Upper Devonian), and Tula and Bobrikovskian (Lower Carboniferous) horizons, as well as carbonate reservoirs of the Tournaisian stage, using the example of one of the deposits in the central part of the Volga-Ural oil and gas province. It is shown that precision methods make it possible to study in more detail the internal pore space of oil-containing reservoirs. X-ray computer microtomography showed the uneven and multidimensional porosity of Devonian sandstones, due to their micro-lamination. The most accurate values of the porosity coefficient from the results of microtomography were obtained for cubes of the smallest size (with linear dimensions of the sample less than 5 mm), so they correspond to a higher resolution of the survey, which allows detecting smaller pores. In this connection, the inverse dependence of the porosity coefficient on the size of the samples was established. Variability of porosity along the layers in the lateral direction is revealed (the property of 'microfaciality'). The combination of traditional and precision methods for determining porosity coefficients will allow us to calculate the oil recovery factor on explored and developed oil deposits more correctly, because additional information on pore size and cavity, connectivity and type of channels, as well as microfacies are taken into account

The possibility of using space correlation with microspheres petroleum deposits

The article presents data on the microspheres in Phanerozoic sediments of the Caspian Basin. It found almost perfect spherical formations diameter 170-950 microns. Studies were performed using microspheres of scanning electron microscopy with a microprobe analysis by X-ray. In mineralogical respect to the scope composed mainly of magnetite. Trace elements (Si, Al, Mn) in the microspheres increased from Paleozoic to Cenozoic deposits that can be used in the future as a geochemical criterion for stratigraphic correlation sections. In Cenozoic microspheres missing potassium and chromium, as noted in Paleozoic microspheres high chlorine content, which may be due to the presence of hibbingita. Textured surface of the microspheres (takyrs, plates, ribs, triangular depression, etc.), the presence of nickel and titanium impurities absence indicate their cosmic origin. Microspheres can be used as benchmarks in the search mikrostratigraficheskih hydrocarbons in sediments of different facies

Composition and morphology of metal microparticles in paleozoic sediments of caspian depression

© Research India Publications 2015. Using the microprobe analysis 18 samples of metallic micro-particles were studied (spheres, plates, coils, wire) from Paleozoic deposits of the Caspian basin. The morphology of the microparticles and their chemical composition showed that the microparticles have different origins. The formation of spiral and wire type forms is associated with volcanic activity, and magnetite microspheres were formed in the Earth atmosphere during the flight and meteorite ablation. It is determined that Mn (0.8-2%), rarely Cr is uniformly distributed in magnetite microspheres. In the interstices of magnetite tablets the releases of native nickel, nickel oxides, the awaruite of Ni3Fe are met rarely. Among the spiral formations the intermetallic compositions of Fe-Cr-Mn and Fe-Cr-Ni are met and the mechanism of their formation in the development of subvolcanic chamber is proposed. The diagrams lg (Cr/Ni) - lg (Cr/Mn) and lg (Fe/Cr) - lg (Fe/Ni) allow to reveal the geochemical differences of metallic microparticles of volcanic and cosmic origin. The metallic microparticles discovered in sedimentary rocks, may be an additional tool for regional parallelization of multipartite cuts, may lead to the revision of biotic process models, the assessment of terrestrial and cosmic processes impact on them, help in the search for hydrocarbon deposits and stratified deposits of solid minerals

Cosmic microspheres in the Carboniferous deposits of the Usolka section (Urals foredeep)

© 2017Magnetite microspheres from the Carboniferous deposits of the Usolka reference section were studied by probe microanalysis, with comparison of the distributions of chemical elements and microspheres. The presence of microspheres in sedimentary strata is considered to be an additional factor for stratigraphic correlation between sedimentary sections. The microspheres are shown to be of cosmic nature. The Late Paleozoic paleoclimatic changes (extreme cooling) and biotic crises were caused by the periodical Solar System motion in the Galaxy, cosmic-dust fallout, and meteorite bombardments of the Earth

Determination of the bashkirian-Moscovian boundary in the volga region via conodont species declinognathodus donetzianus nemirovskaya

The selection of the global biomarker of the lower boundary of the Moscovian stages is one of the pressing issues of Carboniferous stratigraphy. Several solutions are suggested for this problem: Diplognathodus ellesmerensis Bender, Streptognathodus expansus (Igo & Koike) and Idiognathoides postsulcatus Nemirovskaya. The conodont species Declinognathodus donetzianus Nemirovskaya is one of the most prospective. It was detected in the rock sections of west Europe, the Donets Basin, the Moscow Syneclise, south Ural and the Appalachian Basin. The Volga region is also one of the places where Declinognathodus donetzianus Nemirovskaya is often met and this article is dedicated to detailed analysis of this species. © Cambridge University Press 2014

Determination of the bashkirian-Moscovian boundary in the volga region via conodont species declinognathodus donetzianus nemirovskaya

The selection of the global biomarker of the lower boundary of the Moscovian stages is one of the pressing issues of Carboniferous stratigraphy. Several solutions are suggested for this problem: Diplognathodus ellesmerensis Bender, Streptognathodus expansus (Igo & Koike) and Idiognathoides postsulcatus Nemirovskaya. The conodont species Declinognathodus donetzianus Nemirovskaya is one of the most prospective. It was detected in the rock sections of west Europe, the Donets Basin, the Moscow Syneclise, south Ural and the Appalachian Basin. The Volga region is also one of the places where Declinognathodus donetzianus Nemirovskaya is often met and this article is dedicated to detailed analysis of this species. © Cambridge University Press 2014