CONTENTS № 4/2022 |
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DOI: 10.53085/0034-026X_2022_04_03 УДК 550.84 Marchenko A.G. (Tellur North-East LLC) //a-marchenko@yandex.ru Ilchenko V.O. (Nornickel Technical Services LLC) //ilchenkovo@nornik.ru Makarova Yu.V. (VSEGEI) //uvik@bk.ru THE EFFICIENCY OF DIFFERENT SOIL-SAMPLING GEOCHEMICAL PROSPECTING METHODS IN THE SEARCH FOR PGE-CU-NI ORES IN THE LANDSCAPE AND GEOLOGICAL ENVIRONMENT OF NORILSK REGION This paper describes results of test soil geochemical surveys with application of five geochemical prospecting methods which are MMI (Mobile Metal Ion geochemistry), MDE (Method of Diffusive Extraction), TMGM (ThermoMagnetic Geochemical Method), MEFFA (Multi-Element Fine Fraction Analysis), and conventional soil geochemical survey. The test surveys were carried out in the area with basic intrusions which are buried under the drift blanket and contain PGE-Cu-Ni ores. A comparative evaluation is given of the efficiency of those prospecting methods. Keywords: soil geochemical prospecting, PGE-Cu-Ni ore, Norilsk region, mobile speciation of elements, superimposed ispersion patterns, selective analysis, efficiency evaluation Р.3-15 |
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DOI: 10.53085/0034-026X_2022_04_15 УДК 550.84:550.84.094:550.812 Galyuk S.V. //galiouk@mail.ru Menchinskaya O.V. (IMGRE) //menchinskaya55@mail.ru u THE CONCEPT OF ANOMALY AS INTERPRETATIVE BASIS FOR THE GEOCHEMICAL EXPLORATION DATA The paper deals with a number of issues related to display of geochemical sampling data and optimization of sampling grids. The method of informational feature fields is described. Keywords: geochemical anomaly, visualization of geochemical survey data, the geochemical field continuity, the sampling grid optimization, method of informative attribute fields. Р.15-21 |
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DOI: 10.53085/0034-026X_2022_04_22 УДК 553.98:551.73:575.16 Sharafutdinova L.P. (University of Geological Sciences (UGS), Institute of Geology and Exploration of Oil and Gas Fields (IGEOGF), Tashkent) //shleyla1980@gmail.comDjalilov G.G. (Institute of Geology and Exploration of Oil and Gas Fields (IGEOGF), Tashkent) // //gafur@mail.ru LITHOLOGICAL AND STRATIGRAPHIC FEATURES OF THE MIDDLE JURassic SEDIMENTS OF THE NORTH USTYURT DEPRESSION (UZBEKISTAN) The North Ustyurt depression makes up most of the Ustyurt oil and gas region of the Republic of Uzbekistan and is the most studied by drilling. The main productive horizons are Jurassic terrigenous formations occurring at a depth of 2–3 km. The strata under study are characterized by continental sedimentation and are abundant in the inclusion of floristic remains, with rare imprints of freshwater fauna. The article presents the results of a lithological and stratigraphic study of the section of the middle section of the Jurassic system. Keywords: lithology, stratigraphy, palynology, Middle Jurassic, Ustyurt, oil and gas potential. Р.22-30 |
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DOI: 10.53085/0034-026X_2022_04_30 УДК 553.3.041:553.94+553.31 (575.15) Omonov Kh.A. (Uzbekistan temir yullari) //omonov.1979@list.rubu.ru PROSPECTS FOR IRON ORE IN THE KUGITAN MOUNTAINS The article examined and analyzed geological factors in order to clarify the peculiarities of formation of scarn ore phenomena and deposits of magnetite-hematite ores within the Kugitang Mountains. Currently, the main deposits for the development of the iron ore industry of the Republic of Uzbekistan are: Tebinbulak, Surenata and Temirkan. According to the samples selected, Zakhkan and Chuyankan showed high levels of ferruginous ores (magnetite and hematite). Keywords: magnetite-hematite, titanium-magnetite, apatite-magnetite, getite-hydrohetite, Zahkan, Chuyankan, Temirkan, Surenata, Tebinbulak, Kugitang. Р. 30-34 |
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DOI: 10.53085/0034-026X_2022_04_34 УДК 550.837.6 Lubchich V.A. (Polar Geophysical Institute) //lubchich@yandex.ru ELECTROMAGNETIC SOUNDING OF THE EARTH’S CRUST IN THE TRANSITION REGION FROM THE ROCKS OF THE CRYSTALLINE BALTIC SHIELD TO THE ROCKS OF THE SEDIMENTARY COVER OF THE BARENTS SEA PLATE The article deals with the results of experimental work on electromagnetic sounding of the Earth’s crust on the Rybachij and Srednij peninsulas in the Murmansk region. It was found that the electromagnetic sounding of the Earth’s crust with the powerful controlled source is more useful method in difficult geological conditions of the transition region from the crystalline Baltic shield to the sedimentary cover of the Barents Sea Plate, characterized by the presence of widespread zones of tectonic faults. Based on the interpretation of measured geophysical data, geoelectric sections of the Earth’s crust were constructed for the Rybachij and Srednij peninsulas, which are in good agreement with the available geological and geophysical information about the lithosphere structure of this area. The three-dimensional modeling of electrical conductivity distribution in the Earth’s crust was also performed. It was shown that the presence of powerful tectonic faults has a significant influence on the measurement results. In addition, the problem of the impedance approach applicability to interpretation of results of the electromagnetic sounding with natural electromagnetic fields sources in high-latitude Arctic regions was considered. Keywords: electromagnetic sounding, magnetotelluric sounding, impedance, sedimentary cover, crystalline basement, tectonic fault. Р. 34-43 |
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DOI: 10.53085/0034-026X_2022_04_43 УДК: 556.3 Elokhina S.N. (FBGU ≪Hydrospetsgeology≫, Branch ≪Ural regional center of the state monitoring subsurface(SMSC)≫, Ural State Mining University) //elohina@gmsn-ural.ru Zhukovskaya E.P. (FBGU ≪Hydrospetsgeology≫, Branch ≪Ural regional center of the state monitoring subsurface(SMSC)≫) //zhukovskaya@gmsn-ural.ru Cherepanova E.R. (FBGU ≪Hydrospetsgeology≫, Branch ≪Ural regional center of the state monitoring subsurface(SMSC)≫) //cherepanova@gmsn-ural.ru Kindler А.A. (FBGU ≪Hydrospetsgeology≫, Branch ≪Ural regional center of the state monitoring subsurface(SMSC)≫) //kindler@gmsn-ural.ru ASSESSMENT OF GROUNDWATER RESOURCES IN THE PROCESS OF CREATING A SET OF MAPS OF HYDROGEOLOGICAL SUBJECT AT A SCALE OF 1: 200,000 FOR THE CHELYABINSK REGION The article discusses the conditions for the formation of groundwater resources in the area of the of city of Chelyabinsk, the study of which is carried out in the process of state hydrogeological additional study of the territory. The territory under consideration is characterized by very difficult hydrogeological conditions and high technogenic load. An overview and analysis of existing approaches to the methodology for assessing natural and predicted groundwater resources, as well as their resource potential, including those used in regional work, is presented. Keywords: hydrogeological survey, groundwater resources, Ural. Р. 43-49 |
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DOI: 10.53085/0034-026X_2022_04_50 УДК 553.98, 665.612, 665.622 Torikova M.V. (IMGRE) //torikova-marg@mail.ru Mikheeva E.D. (Gidrospetsgeologiya) //Galsuta@rambler.ru Polikashina N.S. (IMGRE) //polikashinanina@yandex.ru FEATURES OF DISTRIBUTION OF CHEMICAL ELEMENTS IN CRUDE OIL VARIETIES, THEIR OXIDATION PRODUCTS AND INDIVIDUAL COMPONENTS The paper deals with features of the chemical elements occurrence in crude oil varieties, their oxidation products and individual components. The fractionation temperature control on concentration of chemical elements in the oil refining products is analyzed. The importance of oxidative and thermal processes in formation of metal loading of the natural hydrocarbon fractions is traced. Possibilities for polycondensation processes as major controls on the metal-bearing oil formation are considered. Keywords: element, crude oil, oxidation products, metal-bearing, processes as major controls. Р. 50-60 |
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DOI: 10.53085/0034-026X_2022_04_60 УДК 553.5 (691) Petrochenkov D.A. (MGRI-RGGRU) //p-d-a@mail.ru Krivoshchekov N.N.(VIMS) //vims-niknik@mail.ru MINERAL COMPOSITION AND GEMOLOGICAL CHARACTERISTICS OF JEWELRY AND ORNAMENTAL AMMONITES OF THE MODIROVALA DEPOSIT, MADAGASCAR On the world market, including the Russian one, ammonites of jewelry and ornamental quality of the Modirovala deposit, Madagascar, are widely represented. Ammonites are found in the marl layer of the Albian tier of the Lower Cretaceous. Studies have established that ammonites consist mainly of calcite from 66 to 90 wt.%. aragonite, dolomite, pyrite, siderite, quartz, apatite, goethite, hematite, aluminosilicates, monazite and X-ray amorphous phase are present. The walls and partitions of the shells have mostly preserved the original aragonite composition. Of the impurity elements in ammonites, % by weight are fixed: Sr to 0.318, Ni to 0.017, As to 0.067 and Pb to 0.013. Mg, Mn and Fe are established in calcite from impurity elements. The color shades of ammonites are determined by the mineral composition in which the contents of calcite, goethite and hematite play a decisive role. The color of calcite is determined by the contents of Mn and Fe. The ammonites of the Modirovala deposit are characterized by high decorative and technological characteristics, which allows them to be used in jewelry and interior products. The established mineral composition and geochemical features of ammonites make it possible to identify the object. Keywords: jewelry and ornamental raw materials, ammonite, calcite, aragonite, Cretaceous deposits, Madagascar. Р. 60-67 |
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DOI: 10.53085/0034-026X_2022_04_60 УДК 553.5 (691) Orlova N. A. (EGE RAS, NEC MGSU) //iderlit@mail.ru CONSIDERATION OF THE TERRAIN OF THE UNEVEN ROOF OF ROCK SOILS AND THEIR POSSIBLE INFLUENCE ON THE FORMATION OF LANDSLIDES IN DISPERSED SOILS Maps of the top of the Upper Carboniferous and overlying Jurassic sediments in the Vorobyovy Gory landslide area were constructed. Local depressions and remnants of carbonate rocks were found in the underground relief. A comparison of the maps showed that the Middle Jurassic argillaceous deposits of the Callovian stage inherited overlie carboniferous limestones. The analysis of changes in the angles of inclination of clays, and their effect on the stability of the slope. Keywords: Carboniferous, Jurassic, landslide, relief, slope stability. Р. 67-70 |