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Moscow University Bulletin. Series 4. Geology

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No 6 (2016)
https://doi.org/10.33623/0579-9406-2016-6

3-9 235
Abstract
In conformity with forecasts of World Health Organization by 2050 in the big and small cities there will live 70 percent of a world's population. It means that more than two thirds of the population of the planet will become a component of new techno and natural ecosystems - geobiotechnoecosystems. For such ecosystems profound changes of natural properties as a result of vigorous activity of the person, acquisition of new qualities by them are characteristic. Changes are shown in all ecological functions of terrestrial spheres - the atmospheres, hydrospheres and lithospheres, including also change of geophysical (power) potential. The material presented in article can be considered the basis for formation of the new scientific and practical direction - a geophysical urboecology.
10-19 501
Abstract
Based оn the facies-structural and paleogeographic analysis there is provided new model of the sea bed morphology and new sedimentation model of the Bazhenov formation (tithonian- lower berriasian) of the West Siberia basin. According to this models very low terrigeneous content in the Bazhenov formation caused by its sedimentation in the deep depressions which were formed on the flanks of the basin. In the central part there was uplifted area with shallow marine environments. Routes and dynamics of marine currents are also discussed in this paper. Currents caused aeration periods of the hydrogen and carbon dioxide enriched seabed water in tithonian - early Berriasian time. During this water migration suffocation periods occurred.
20-27 332
Abstract
Bitak Formation is located within Simferopol area. It is presented by badly sorted conglomerates. Lithological description of conglomerates is given. New data about age of the clastic zircons are presented. The possible age of Formation is discussed. It is assumed that Bitak Formation is older than Late Bajocian volcanic rocks and is younger than deposits of Tavrik Formation ant it analogs. Bitak Formation was accumulated in the pull-apart basin. A few basins of the such type are detected in the Crimea. It is assumed that Bitak basin is located at the base of Middle Jurassic arc-island complex of Crimea.
28-36 220
Abstract
Numerous plant remains were first found in the Upper Carboniferous of Western slope of the Southern Urals (locality Karantrav). Plant remains are represented by cone and stem lycopsid imprints, and sporadical stem imprints of arthrophytes. A brief stratigraphic characteristic of the studied locality is given. Studied plant assemblage are represented by Lepidodendron ophiurus Brongniart, L. vaselgense Anikeeva et O. Orlova, sp. nov., Lepidodendron. sp., Lepidostrobus tevelevii O. Orlova, Mamontov et Anikeeva, sp. nov., L. ronnaensis Bek et Oplustil, Knorria sp., Calamites sp. и Mesocalamites ramifer (Stur) Hirmer. In-situ microspores of Lycospora-type were discovered in the sporangia of some strobili of genus of Lepidostrobus. Four lycopsid species (two are new) were described.
37-45 291
Abstract
Longmen Shan fault zone is located in the special joint between the Triassic Songpan-Ganzi orogen of the Qinghai-Tibetan Plateau and the stable Sichuan basin of the Yangtze platform. In this region there are four major active faults and three tectonic nappes. According to the analysis of neotectonics and historical earthquakes the Longmen Shan fault zone is a dangerous earthquake belt. The rupture system of the Wenchuan earthquake is characterized by thrust and dextral strike-slip movement.
46-55 627
Abstract
Petromagnetic characteristics rocks croup out in the Main Uralian Fault zone and Voikar- Synya ophiolites confirmed that multistage deformation led to formation of modern structure of Ural. Analysis of the anisotropy of the magnetic susceptibility of rock minerals detects orienta- tion formed by the thrust (reverse faults) and strike-shear strain at an early stage of the Uralian orogeny. The main axes of the ellipsoid of the anisotropy of magnetic susceptibility associated with regional thrusting - the main stage of formation of structure of the Urals have been revealed rarely. It indicates almost complete resetting thrust petrofabric by later shear deformations.
56-63 404
Abstract
A methodic of destruction of objects with hardly dissolvable matrix (earth materials, tableted medical products) for subsequent determination of microelements by high-resolution mass- spectrometry with inductively coupled plasma is developed. Analytical and methodical problems, appearing during of a sample collection and preparation at investigated objects, are described, the ways of their overcoming are proposed. The opportunity of carrying out of quantitative analysis of investigated objects after dissolution by means of using multielemental standard solutions is shown. Accuracy of a developed methodic of sample preparation was checked by analysis of standard samples of earth materials.
64-73 259
Abstract
The main source rock within the south-western part of the Yuzhno-Sakhalinsk pool allo- cated clay deposits of Verhneduyskaya Formation Ealy Miocene age and Middle Miocene dark gray, black argillites of Kurasiyskaya Formation, as well as, probably, black argillites Bykovskaya Formation of Late Cretaceous age.
74-78 246
Abstract
In this article we provide geoelectric research results of Mshentsy area in Tver region. To get information about geologic structure of the area and such processed as groundwater filtration and karst geophysical investigations were preformed (electrical resistivity imaging, self potential study, water resistivity and temperature measurements). Using petrophysical modeling of rock apparent resistivity and taking into account geoelectric data lithology differentiation was performed. Investigations showed that karstic carbonates are widely spread in lower part of the cross-section. We draw a conclusion that Mshentsy area is a localized intensive karst zone.

SHORT MESSAGES

79-82 247
Abstract
In this paper, the results of development and implementation in everyday practice, including at the MSU well, digital logging complex, discusses the complex interpretation of the data in relation to the tasks of hydrogeology. The complex, in addition to the obligatory types of log- ging (GK, PZ, PS, DS, a thermometer), using new developments, for example, videokarotazha device and high-frequency induction probe (VIC), which is used in plastic-cased wells.
83-85 238
Abstract
In experimental studies rate leaching gypsum from the pore space of the sandstone revealed a zone with higher content of dolomite (due dolomitization calcite in the peripheral region of the block), with minimum values of the gypsum content and maximum - total porosity. It is shown that the leaching process from rock blocks of the coastal zone Kafirnigan River defined by two successive stages: 1) leaching of dolomitization zone (the slowest) and 2) in the field with the background values of dolomite and calcite (fast). The average value coefficient of Ca2+ ions diffusion in the second region ~70% higher than in the first.
86-93 515
Abstract
The composition of Bazhenov and Abalak Formation rocks of Western Siberia is presented. Correlations of macro- and micro-components concentration with the base mineral and organic matter content in rocks are showed. Investigations of trace elements allow determining sedimentation conditions: redox conditions, hydrogen sulfide contamination and the source of the sedimentary material. The results showed that the rocks of the Bazhenov Formation were formed at low flows of clastic material under reducing conditions and a periodic hydrogen sulphide mode.


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ISSN 0579-9406 (Print)