CONTENTS # 10/2023 |
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DOI: 10.53085/0034-026X_2023_10_03 УДК: 553.495 (571.55) Mikhaylov V.A., Afanaseva E.N. (VSEGEI) FEATURES OF THE FORMATION OF URANIUM MINERALIZATION IN THE SAYAN TROUGH (EASTERN SAYAN AREA) The geological structure of the uranium-ore objects within the Uvatsky (Ansakh deposit) and Biryusinsky (VostochnoStolbovoye ore occurrence) Early Proterozoic dome uplifts, located in the Riphean Sayan trough, as well as the mineral composition and alterations of the ore-bearing rocks have been studied. Based on the results of the study, a conclusion about the Pre-Riphean origin of these uranium-ore objects and its genetic connection with the processes of the weathering crust formation has been made. Keywords: pre-Riphean structuralstratigraphic unconformity, weathering crust, metasomatic alterations, uranium mineralization. P. 3-11 |
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DOI: 10.53085/0034-026X_2023_10_11 УДК 550.84.02 Krinochkin L.A.1, Blokov V.I.1,2, Krinochkina O.K.3 (1 — IMGRE, 2 — IGEM RAN, 3 — NIU MGSU) THE GENESIS OF THE VORONTSOVSKOYE DEPOSIT AND PROSPECTS FOR GOLD MINING IN THE EASTERN URALS (IN LIGHT OF GEOCHEMICAL DATA) The article is devoted to assessing the prospects for gold mineralization in the Eastern Urals on the basis of geochemical data obtained during the study of geochemical aureoles of the Vorontsovskoye deposit and regional geochemical works at a scale of 1:1,000,000 on sheet O-41. The purpose of the study is to identify and forecast new gold ore regions that are promising for the discovery of industrial gold deposits in the Eastern Urals. The studies included field observations, geochemical sampling of bottom sediments and bedrock, and analytical work. More than 2000 samples were analyzed. The abundances of Au and its satellites were determined in them by inductively coupled plasma mass spectrometric method (ICPMS) and approximate quantitative spectral (PCAESA) analysis and mercury by atomic absorption method (AAS) at the analytical center of the Federal State Unitary Enterprise «IMGRE». Based on the obtained geochemical data and their interpretation, a new ore body is predicted to be discovered at the deep horizons of the Vorontsovskoye deposit, and a number of areas promising for the discovery of gold deposits have been identified in the territory of the Eastern Urals. The practical significance of the conducted research lies in the fact that geochemical anomalies promising for the discovery of new large gold deposits have been identified in a region with a developed mining base, but with a depleting MSB of gold. Keywords: gold, Eastern Urals, Vorontsovskoye deposit, anomalous geochemical fields. P. 11-17 |
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DOI: 10.53085/0034-026X_2023_10_18 УДК: 553.3.06:553.441:553.495 (575.1) Ezhkov Yu.B., Rakhimov R.R., Kholierov A.T., Toshmetov U.Kh. (State Institution «Institute of Mineral Resources» of the State Committee for Geology of the Republic of Uzbekistan) GENETIC FEATURES, GEOCHEMICAL SPECIALIZATION AND AUMPGUSULPHIDE ORE CONTENT IN THE BLACK SHALE PROVINCE OF UZBEKISTAN AND THE WORLD Saturated with organic substance (OS) strata of silty-argillaceous, argillaceous-carbonate and siliceous rocks from the so-called «black-shale formations» (BF) have long attracted the attention of researchers as concentrators of many metals — noble, non-ferrous, rare earths, etc. Clay shales predominate in the composition of metal-bearing black shales. Quite often, siliceous schists, limestones, dolomites, marls. A characteristic feature of ore deposits in black shales is stratiformity. Nunc, complura exemplorum nota sunt quae processus chalcitidis eventum in strato mundi shale nigro designant. Unum ex his exemplaribus, quod fundamentum cepimus, a V.F. Protsenko [5]. The idea of creating the Auminzatau model was based on [7] the establishment of signs of zoning — the zone of ore concentration (OC) — in the distribution of uranium-rare-metal and gold ore occurrences and deposits in relation to the granite intrusive — the generator of ore-metasomatic solutions-fluids of the ore-magmatic system. Keywords: black shales, geochemical specialization, ore provinces, integral models of ore content of Muruntau and Auminzatau gold, uranium, platinoids. P. 18-26 |
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DOI: 10.53085/0034-026X_2023_10_26 УДК 551.4.012, 550.841 (84.092) Orlov M.V.1, Orlova N.A.2 (1 — TSNIGRI, 2 — IEG RAS) METHODOLOGY FOR TESTING GLACIAL DEPOSITS IN THE SEARCH FOR DIAMOND DEPOSITS Macro- and mesoforms of the relief ancient glacial deposits are unevenly distributed over the area of glacier movement. Glaciers can sculpt and carve landscapes. This paper provides a summary of kimberlite mineral indicator and genetic types of deposits derived from glacial and water-glacial sediments and detection of drift localization. The theory of the formation of glacial deposits is the main one in this work, and this is considered as a prospect for the discovery of diamond deposits on the territory of the Republic of Karelia. The purpose of the work was a technique to identify magnetic anomalies due to kimberlite pipes, using the example of work in the search for diamonds in the North-West part of Canada. Keywords: kimberlites, mineralogical prospecting, sampling, glacial deposits, Quaternary deposits. P. 26-30 |
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DOI: 10.53085/0034-026X_2023_10_30 УДК 552.12.550.04.08 Chan Van T., Ignatov P.A., Do M.P. (MGRIRGGRU) GEOLOGICAL POSITION AND MATERIAL COMPOSITION OF ORES OF GOLD DEPOSITS OF THE KUANGNAMKUANGNGAY REGION, CENTRAL VIETNAM Presented are the geologic setting, mineral and elemental composition of the ores, and the sequence diagram of mineral formation of the gold deposits of the Phuoc Son and Phuoc Thanh ore fields in Quang Nam and Quang Ngai provinces in central Vietnam. According to geological mapping data at 1: 500000, 1:50,000 scale and larger, the gold mineralization is located in metamorphic rocks Nuivu and proterozoic-cambrian Kham Duc complex. The ore-bearing zones are associated with intrusive granitoid complexes of the Late Paleozoic Bengiang — QueSon and Permian Bana complexes. The gold ore bodies are represented by quartz-sulphide veins. The mineral composition of the ores was determined by examination of 399 anshlifs and diffractometry. Textural analysis was performed on more than 400 samples. Ore minerals include pyrite, gold, galena, sphalerite, arsenopyrite, chalcopyrite, magnetite, and graphite. Melnikovite, hydrogetite, goethite, covellite, anglesite, scorodite and smithsonite have been diagnosed in the oxidation zone. Ore mineralization is accompanied by berezites and chlorite-sericite, metasomatites. The distribution of gold and related elements in the ores was determined by 201 atomic adsorption analyses. The geochemical relationship of the ore constituents was determined by the multifactorial statistical correlation method, which showed a weak positive correlation of gold with bismuth, silver and zinc. Keywords: Phuoc Son and Phuoc Thanh gold fields, mineral composition of ores, stages of mineralization, Quang Nam–Quang Ngai district, Vietnam. P. 30-38 |
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DOI: 10.53085/0034-026X_2023_10_39 УДК 553.078 Goipov A.B., Ahmadov S.I., Musakhonov Z.M. (GU «Institute of Mineral Resources», Ministry of Mining of the Russian Federation) ANALYSIS OF COSMOSTRUCTURAL ELEMENTS OF THE BUKANTAU MOUNTAINS (CENTRAL KYZYLKUMS) On the basis of automated lineament analysis in the LESSA programs, the materials of remote sensing of the earth in various wavelength region of the electromagnetic spectrum in the territory of the Bukantau mountains of the Central Kyzyl Kum were studied. Based on a set of different well-known features that determine the severity of linear structures by linear change in phototone, the location and strike of regional faults were clarified in space images, new cosmostructures were identified and their relationship with the endogenous mineralization of the Bukantau mountains was determined. Keywords: ERS, space structures, lineament, LESSA, faults, ore-controlling structures, mineralization, rose-diagrams. P. 39-45 |
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DOI: 10.53085/0034-026X_2023_10_45 УДК 553.411:553.065.2+553.078 (571.62) Kirillov V.E.1, Ivanov V.V.2, Trushin S.I.3, Yurchuk A.Yu.4, Yurchuk Yu.V.4, Konovalova N. S.1 (1 — IT&G FEB RAS, Khabarovsk; 2 — FEGI FEB RAS; 3 — AO Polymetal Management Company, St. Petersburg; 4 — OOO «GEPART», Khabarovsk) KUYAN GOLDBEARING STRUCTURE OF THE ALBAZINO ORE CLUSTER: GEOLOGY, GEOPHYSICAL FIELDS, AND ORES New data on the Kuyansk ore-bearing structure of the Albazinsky gold-bearing cluster are presented. A laccolith-type granodioritic subvolcanic intrusion intruded by andesitic eruptive breccias forms the basis of the structure. Geological features of the Kuyan structure can be recognized in characteristic concentric magnetic fields, as well as linear geoelectric fields corresponding to ore-bearing faults. Zones of beresitization contain Au, Cu, Bi, and Te mineralization allowing the mineralization to be assigned to the gold-rare metal type. The potential of the Kuyan structure to host mineralization is associated with meridional zones of low resistivity fixed at depth. Keywords: Kuyan ore-bearing structure, subvolcanic intrusion, eruptive breccias, geophysical fields, ore mineralization. P. 45-55 |
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DOI: 10.53085/0034-026X_2023_10_55 УДК 553.98:551.24 (470.41) Baratov A.R.1, Gatiyatullin R.N.1, Gatiyatullin N.S.2 (1 — Tatar Geological Prospecting Department (TGPD) of PJSC «Tatneft», 2 — Kazan Branch of the Federal Budgetary Institution «State Commission for Mineral Reserves») SPATIAL RELATIONSHIP OF THE LOCATION OF OIL AND GAS BEARING STRUCTURES WITH THE STRUCTURE OF DEEP HORIZONS OF THE EARTH’S CRUST (ON THE EXAMPLE OF THE VOLGA URAL OIL AND GAS PROVINCE, WITHIN THE BORDERS OF THE REPUBLIC OF TATARSTAN) In the middle of the last century P.N. Kropotkin [6] published an article in which he expressed the idea of a relationship between the processes of oil and gas accumulation and deep degassing of the Earth. Over time, a number of weighty arguments were accumulated in favor of the deep nature of oil and gas, which were given a genetic character and many interesting factors were revealed [4]: — the scales of modern and paleodegassing are three orders of magnitude higher than the probable possibilities of hydrocarbon generation in sedimentary basins; — according to the study of the ice cores of Antarctica and Greenland, the grandiose scales of the removal of hydrocarbon fluids into the Earth’s atmosphere and the waters of the World Ocean (through hydrocarbon degassing) in the geological past became known; — geodynamic and structural-tectonic control of global and regional irregularities in the distribution of oil and gas fields has been established; — fundamentally new evidence of the mantle nature of oils has been obtained based on the study of the spectra of lanthanides and platinoids in them, and many other data in favor of the leading role of endogenous factors in the genesis of hydrocarbon fluids. Keywords: oil and gas accumulation processes, deep degassing of the Earth, mantle nature of oils, dynamic anomalies, formational zoning of the basement. P. 55-60 |
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DOI: 10.53085/0034-026X_2023_10_61 УДК 550.46 Savichev O.G., Domarenko V.A., Vladimirova O.N., Peregudina E.V., Kenesbaev B.K. (National Research Tomsk Polytechnic University) CONDITIONS OF INTERACTION OF NATURAL WATER WITHIN THE BAKCHAR ORE CLOSE (WESTERN SIBERIA) Statistical analysis of data on the water regime and chemical composition of groundwater, marsh and river waters in the catchment area of the Chaya River within the Bakchar iron ore cluster (Western Siberia) and calculation of the elements of water and geochemical balances of this river and its tributaries were carried out. It is shown that the minimum interaction of surface and ground waters is confined to raised bogs, and in general for the catchment area of the river. Tea is characterized by the predominance of the processes of dissolution and leaching of rocks. Keywords: water and geochemical balance, marsh, river and groundwater, comparative analysis, Western Siberia. P. 61-67 |