CONTENTS № 6/2021 |
GEOLOGY & METHODICS OF PROSPECT & EXPLORATION OF DEPOSITS |
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УДК 553.24.065:553.495 (470) Mashkovtsev G.A. (VIMS) // gregor1944@mail.ru Ledeneva N.V. (VIMS) // ledeneva@vims-geo.ru THE ROLE OF DEEP FACTORS IN THE FORMATION OF HYDROTHERMAL URANIUM DEPOSITS The features of geological structure and genesis of the uranium-bearing volcano-tectonic structures (VTS) of the Russian Federation and adjacent territories are considered. It is assumed that the formation of VTS and of the commercial uranium mineralization are associated with the foci of the manifestation of the flow of deep fluids. It is proposed that the integrated ore-forming hydrothermal uranium system should be understood as the totality of sub-crustal and crustal processes of formation of volcanic and tectonic structures, and the most importantly, the activity of deep high-heated fluids, their transformation into productive medium — and low-temperature solutions, and the actual ore-forming process. Keywords: volcano-tectonic structures, deep fluids, metal-bearing solutions, bimodal volcanism, hydrothermal ore formation Р. 3-14 |
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УДК 551.24 (552.11) Kremenetskiy A.A. (IMGRE) // nauka@imgre.ru Spiridonov I.G. (IMGRE) // imgre@imgre.ru Gramenitskaya P.N. (IMGRE) // polina-gramenitskaya@mail.ru OPHIOLITES OF THE EASTERN ARCTIC: GEOTECTONIC PARADIGMS AND GEOCHEMICAL RECONSTRUCTION OF GEODYNAMIC SETTINGS The problem of recognizing the continental and oceanic nature of ophiolite associations is discussed. Geochemical discrimination of known typical ophiolite complexes, i.e., oceanic, island-arc, ocean-continent transition zones and continental fold belts, has been performed. The island arc ophiolite belts are subdivided into continental (folded areas and sutures of PZ-MZ age) and oceanic (the rift zones rejuvenated during MZ-KZ). Geochemical recognition of the geodynamic ophiolite-forming settings of the South Anyui suture and other belts of the Eastern Arctic revealed their correlation to the continental island arc systems, what is proposed as an additional argument in substantiating the contouring of the Russian continental shelf outer boundary. Keywords: ophiolites, geodynamic paradigms, continental island arc systems, geochemical reconstruction of ophiolite belts, Eastern Arctic. Р. 14-28 |
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УДК 551.251.551.161.550.38 Do M.P. (MGRI–RGGRU, Geophysical Division, General Department of Geology and Minerals of Vietnam, Hanoi) // dominhphuong.dkt@gmail.com Ignatov P.A. (MGRI–RGGRU) // ignatovpa@mgri.ru Phan T.H. (MGRI–RGGRU) // phanthihong@humg.edu.vn Nguyen D.H. (MGRI–RGGRU) // nguyenduyhung@humg.edu.vn Tran V.T.(MGRI–RGGRU) // tiendcb@gmail.com STRUCTURES CONTROLLING Cu-U-Au MINERALIZATION IN KON RA AREA, KONTUM PROVINCE, CENTRAL VIETNAM The article discusses the geological structure and history of the development of the Kon Ra area, Kontum province, Сentral Vietnam, which has Au-U-Cu ore mineralization. Based on the data of geological mapping and interpretation of aeromagnetic surveys, two large tectonic blocks have been identified in the area, in one of which ore occurrence is localized. The blocks are composed of complexes of metamorphic rocks of the Proterozoic-Cambrian and differ in the composition and structure of volcanic-sedimentary-metamorphic rocks and different ratios of Silurian and Triassic granitoids. The Precambrian, Early Paleozoic and Mesozoic-Cenozoic stages of tectonic-magmatic manifestations with a predominance of plastic dislocations in the Late Precambrian and Early Paleozoic and brittle ones in the Mesozoic-Cenozoic have been substantiated. Based on the data of geo-mapping, analysis of magnetic field gradients and construction of a geo-field 3D model based on the recalculation of magnetometry, the main faults are identified. The site with Cu-U-Au mineralization is located in the rocks of the Proterozoic-Cambrian complex Khamduc in the exoscarn zone of Triassic granites of the Haivan intrusion. The host rocks underwent at least three phases of regional deformation. In the first phase, in the Precambrian and Early Paleozoic, complex folds of various orders were formed. In the second phase, the granite-genis of the Chulai complex were formed in the Silurian, and there was a renewal of ancient structures. During the third phase, brittle deformations predominated in the Triassic — Cenozoic, mainly in the form of reverse faults and strike-slip faults. Ore-bearing zones with Cu-U-Au mineralization have a lenticular shape and are confined to a flexure-like bend of the pull apart type of a northeastern strike-slip shear zone. Keywords: Cu, U, Au, ore occurrence, deformation phase, magnetic field, fault, textonic block, Kon Ra. Р. 28-34 |
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УДК 553. 550.8.11 Onikienko K.D. (MGRI-RGGRU) Vercheba A.A. (MGRI-RGGRU) // aa_ver@mail.ru Sokolov S.A. (MGRI-RGGRU) // sokolovsa@mgri.ru GEOLOGICAL CONDITIONS OF FORMATION OF A PRECAMBRIAN GOLD SULPHIDIC AND SILICEOUS MINERALS OF THE STAROOSKOLSKY ORE AREA In article Precambrian formations of ferruterous quartzites which contain more than 60 % of world reserves and resources of iron ore are considered and widely shown on all continents within greenstone metamorphic belts. Many bended iron ore formations (BIF) are gold-bearing. The complex composition of ores of fields of this formation speaks about geological conditions of their formation and safety during different stages of manifestation of submarin magmatic processes. It is shown on an example of paleoproterozoy ferruterous and siliceous miniralzation of the Starooskolsky ore area. Keywords: a formation of the bended ferruterous quartzites, Transvaal supergroup BIF, Kursk magnetic anomaly, a ferruterous — siliceous and gold sulphidic — siliceous mineralization. Р. 35-39 |
HYDROGEOLOGY & GEOLOGICAL ENGINEERING |
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УДК 556.639; 556.38 Kononchenko E.V. (Hydrospetsgeology) // lena.konon@mail.ru Petrash A.B. (Hydrospetsgeology) // A.B.Petrash@yandex.ru Dorofeev A.N. (Rosatom) // ANDorofeev@rosatom.ru MODEL ANALYSIS OF PIMCU INDUSTRIAL NUCLEAR WASTE WET STORAGES CASCADE IMPACT ON QUALITY OF GROUNDWATER EXTRACTING BY VOSTOCHNO-URULYUNGUJSKIJ WATER INTAKE BASED Based on complex analysis of natural and industrial conditions 3D solute transport model was made. Absence at present of industrial wet storages cascade impact on quality of groundwater extracting by water intake was proved and long-term forecast of contamination transport with groundwater flow was made. Keywords: industrial wet storages for nuclear waste, numerical modeling, solute transport, water intake, groundwater. Р. 39-50 |
TECHNIQUES & TECHNOLOGY |
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УДК 552.11 Gorbatova E.A. (VIMS) // lena_gorbatova@mail.ru Pirogov B.I. (VIMS) // pirogov_bi@inbox.ru REACTION STRUCTURES OF BASIC IGNEOUS ROCKSINDICATORS OF MINERAL FORMATION CONDITIONS Mineralogical studies of the main igneous rocks allowed us to identify and analyze the features of reaction structures that are indicators of changing conditions of mineral formation processes. The presence of reaction rims of orthopyroxeneamphibole composition indicates the initial presence of igneous olivine in intrusive rocks. The products of olivine changes (symplectic accretions of orthopyroxene and amphiboles, serpentine, saponite, saponite, and goethite) reflect the physical and chemical parameters of mineral formation processes, which allows us to recreate the post-magmatic processes of rock transformation. Keywords: olivine change products, reaction rims, symplectic accretions of orthopyroxene and magnetite, indicators of the mineral formation environment Р. 50-56 |
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УДК 553.43.5:549.08+622.7.017 Likhnikevich E.G. (VIMS) // likhnikeevich@mail.ru Ozhogina Е.G. (VIMS) // vims-ozhogina@mail.ru Permyakova N.A. (VIMS) // permykovana@mitht.ru MINERALOGICAL FORECAST OF CHOICE TECHNOLOGIES FOR PROCESSING RARE METAL ORES On the basis of detailed mineralogical studies for rare-metal ores of the Tomtor and Chuktukon deposits, forecast criteria are established that determine the choice of technologies for their processing: 1 — complex morphostructural composition (variable granular composition, significant number of fine-disperse and metacolloid formations formed by mineral individuals and micro- and nanometer-sized aggregate), phase heterogeneity of mineral grains caused by various reasons; 2 — variable chemical composition of ore-forming minerals caused by isomorphic substitutions of the atoms of chemical elements in their crystal structure; 3 — polymineral composition associated with the simultaneous presence of minerals of different paragenetic associations. The established predictive mineralogical criteria for the selection of technologies for processing rare metal ores allow us to justify optimal ways to extract a useful component and ensure the complex processing of ores. Keywords: rare metal ores, granular composition, pyrochlore, monazite, crandallite group minerals, hydrometallurgical technologies Р. 56-60 |
MANAGEMENT & ECONOMICS |
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УДК 549.08:553.087 Levchenko E.N. (IMGRE) // Levchenko@imgre.ru SCIENTIFIC AND METHODOLOGICAL SUPPORT IN THE SYSTEM OF GEOLOGICAL STUDY OF SUBSOIL, EXTRACTION AND PROCESSING OF MINERAL RAW MATERIALS The modern tasks of scientific and methodological support in the system of geological study of subsurface resources are considered. The main attention is paid to the specifics of the study and processing of complex rare metal raw materials. On the example of specific objects, the methodological support at various stages of geological exploration, the results of geological and technological mapping are considered. Keywords: rare metal ores, stages of geological exploration, mineralogical studies, technological tests, geological and technological mapping. Р. 61-67 |
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УДК 55+061.22 Orlov V.P. (Russian Geological Society) // rosgeo@yandex.ru Farrakhov E.G. (Russian Geological Society) // rosgeo@yandex.ru Volfson I.F. (Russian Geological Society) // rosgeo@yandex.ru Alekseev V.M. (Russian Geological Society) // rosgeo@yandex.ru Zakharova L.E. (Russian Geological Society) // rosgeo@yandex.ru Shumkova V.M. (Russian Geological Society) // rosgeo@yandex.ru Prozorova M.V. (Russian Geological Society) // rosgeo@yandex.ru RESEARCH AND ORGANIZATIONAL ACTIVITIES OF THE RUSSIAN GEOLOGICAL SOCIETY In 2022, February the 30 th anniversary of the establishment of a reputable professional non-government organization — the Russian Geological Society will be celebrated. According to the its Regulation, ROSGEO is an organization of Russian eologists, created to promote the search and implementation of innovative trends in science and practice, the development of solutions designed to determine the strategic goals and objectives of the development of the Russian geological industry and science, both in the short and long term. This article provides examples of the participation of ROSGEO in the development of innovative areas of geological research, decision-making and application of the results obtained in the practice of geological exploration, protection and rational use of mineral resources, environmental protection and prevention of health of professional geologists and the population of territories of natural and technological risks. Keywords: Russian Geological Society, professional reputable organization, geological science and practice. P. 67-74 |