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Artykuły w czasopismach na temat „Placer deposit”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Stepanov, V. A. "Reference couple gold deposit — placer as a basis for forecasting of the new gold deposits in Amur river basin." Proceedings of higher educational establishments. Geology and Exploration, no. 6 (January 3, 2019): 49–58. http://dx.doi.org/10.32454/0016-7762-2018-6-49-58.

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About 1400 placers and several dozens of ore gold deposits are known in the Amur gold-bearing province. Placers are to a large degree worked out, so the future of the province is seen to be in the discovery of the new gold deposits. The paper shows the dependence of the productivity and composition of the native gold placers on the size and formational affiliation of the placer-forming gold deposit. The reference couples have been identified: the gold deposit and the placer formed due to the erosion of its' upper part. For example, the Tokur gold-quartz deposit is a channel-fill placer in Toku

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Kedrova, T. V., I. N. Bogush, N. N. Zinchuk, L. D. Bardukhinov, A. N. Lipashova, and V. P. Saltykova. "Diamond Placers of the Nakyn Kimberlite Field." Russian Geology and Geophysics 63, no. 3 (2022): 245–54. http://dx.doi.org/10.2113/rgg20204259.

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Abstract The paper presents the results of studies of diamonds from Early Jurassic sediments making up the Nyurbinskoe buried placer of the Nakyn kimberlite field, unique in diamond reserves. The main task is to identify diamond distribution patterns in the deposits of the Dyakhtar Stratum (lower deposit) and the Ukugut Suite (upper deposit) within the placer. A comparative analysis of the typomorphic features of diamonds from the upper and lower deposits of the placer was carried out. Variations in the contents of crystals with certain properties that form the image of a diamond-bearing geolo

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Tampubolon, Armin. "The Indonesian Titanium Deposit Types and Their Resources: The Aspects For Titanium Commodity Development." Buletin Sumber Daya Geologi 8, no. 3 (2013): 100–109. http://dx.doi.org/10.47599/bsdg.v8i3.85.

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Indonesia has several Titanium deposit types: beach placer, alluvial and lateritic types. The source of Titanium minerals in beach placer is derived from Tertiary Volcanic Rocks.Theoccurence of alluvial Titanium deposit is closely associated with cassiterite (tin minerals) alluvial in Bangka-Belitung Islands. The source of Titanium minerals (ilmenite) are derived fromweathering on tin mineralization hosted in metamorphic and granitic rocks within uplifted morphology areas. Lateritic Titanium deposits are formed by lateritization process in association with bauxite and nickel in Riau, Kalimanta

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Dudinskiy, F. V., and K. B. Nechaev. "Placer deposit mining method justification." IOP Conference Series: Earth and Environmental Science 229 (March 25, 2019): 012013. http://dx.doi.org/10.1088/1755-1315/229/1/012013.

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Boguslavskiy, M. A., and S. O. Khudyakov. "Characteristics of native gold at Kosumnerskoe placer gold deposit (the Nether-Polar Urals)." Proceedings of higher educational establishments. Geology and Exploration, no. 5 (November 2, 2018): 24–30. http://dx.doi.org/10.32454/0016-7762-2018-5-24-30.

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The paper presents the results of a study of heavy mineral concentrates of Kosumnerskoe gold deposit as well as the native gold from them. This gold deposit includes two gravel deposits. The granulometric composition, morphology, roundness, flatness, presence of intergrowths of gold with other minerals, as well as the character of the surface, the chemical composition and internal structure of gold, have been investigated. Based on these results, the placer gold of rivers Narta-Yu and Nester-Shor has been concluded to be similar in morphology, chemical composition and internal structure so it

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6

Ng-Cutipa, Wai L., Ana Lobato, Francisco Javier González, et al. "Spectral Angle Mapper Application Using Sentinel-2 in Coastal Placer Deposits in Vigo Estuary, Northwest Spain." Remote Sensing 17, no. 11 (2025): 1824. https://doi.org/10.3390/rs17111824.

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Remote sensing applications for marine placer deposit exploration remain limited due to the mineralogical complexity and dynamic coastal processes. This study presents the first medium- to high-level detailed multi-scale remote sensing analysis of placer deposits in the Rías Baixas, NW Spain, focusing on five beaches within the Vigo Estuary. Ten beach samples were analyzed for their heavy mineral (HM) content and spectral signatures, using bromoform separation and FieldSpec 4 spectroradiometer equipment, respectively. The spectral signatures of beach samples with a high HM content were charact

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7

Ng-Cutipa, Wai L., Ana Lobato, Francisco J. González, et al. "Spectral Angle Mapper Application Using Sentinel-2 in Coastal Placer Deposits in Vigo Estuary, Northwest Spain." Remote Sensing 17, no. 11 (2025): 1824. https://doi.org/10.3390/rs17111824.

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Remote sensing applications for marine placer deposit exploration remain limited due to the mineralogical complexity and dynamic coastal processes. This study presents the first medium- to high-level detailed multi-scale remote sensing analysis of placer deposits in the Rías Baixas, NW Spain, focusing on five beaches within the Vigo Estuary. Ten beach samples were analyzed for their heavy mineral (HM) content and spectral signatures, using bromoform separation and FieldSpec 4 spectroradiometer equipment, respectively. The spectral signatures of beach samples with a high HM content were

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8

Singh, Deependra, Suddhasatwa Basu, Bighnaraj Mishra, Sasmita Prusty, Tonmoy Kundu, and Raghupatruni Rao. "Textural and Chemical Characters of Lean Grade Placer Monazite of Bramhagiri Coast, Odisha, India." Minerals 13, no. 6 (2023): 742. http://dx.doi.org/10.3390/min13060742.

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The present study aims to investigate the textural, mineralogical and geochemical characteristics of lean grade placer monazite from the Bramhagiri beach sand deposit to assess the possibility for its use in industrial applications. The bulk back dune sand deposit with 18 samples showed the elements uranium and thorium in traces, phosphorus and calcium in minor amounts, and alumina, silica and titanium in major amounts. Since apatite was absent in this placer deposit, P and Ca were attributed to monazite only. Based on the chemical analysis, it was established that the monazite mineral exists

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9

OKHOLINA, Tetiana, and Halyna KUZMANENKO. "COMPARATIVE GEOLOGICAL AND ECONOMIC ASSESSMENT OF THE TITANIUM DEPOSITS OF UKRAINE USING THE EXAMPLE OF THE NOVOMYRHOROD PLACERS DISTRICT." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3 (102) (2023): 69–73. http://dx.doi.org/10.17721/1728-2713.102.09.

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The article considers one of the methods of geological and economic assessment – ranking of titanium ore deposits on a point scale on the example of the Novomyrhorod placer district, which includes the Birzulivske deposit, Likarivske, Andriivske, Valuivske, Novomyrhorod placers, as well as the Eastern and Western residual areas. A brief geological description of the compared titanium objects is given, as well as the geological, qualitative and economic indicators are used to make a comparative geological and economic assessment of the studied deposits and placers. The use of a scoring scale al

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10

Kamiludin, Udaya, I. Nyoman Astawa, and Moch Akrom Mustafa. "INDIKASI KETERDAPATAN ENDAPAN PLASER PEMBAWA TIMAH DAN UNSUR TANAH JARANG (REE), DI PERAIRAN TODAK, SINGKEP, KEPULAUAN RIAU." JURNAL GEOLOGI KELAUTAN 13, no. 2 (2016): 109. http://dx.doi.org/10.32693/jgk.13.2.2015.266.

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Penelitian geofisika di Perairan Todak, Singkep, Kepulauan Riau menggunakan seperangkat peralatan seismik pantul dangkal saluran tunggal. Tujuan penelitian ini adalah untuk menunjang penelitian keterdapatan endapan plaser pembawa timah dan unsur tanah jarang (REE). Hasil interpretasi rekaman seismik diperoleh terdapatnya lembah/mangkuk yang terbentuk secara alami akibat adanya terobosan batuan granit, di mana lembah/mangkuk-mangkuk ini merupakan tempat terjadinya sedimentasi dari hasil pelapukan batuan di sekitarnya. Hasil interpretasi rekaman seismik pantul saluran tunggal analog di perairan

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11

Chetvertakov, Ivan, Maksim Dzhangirov, Igor Sharygin, and Egor Gladkochub. "Gold-bearing placers of the Yurskoe deposit and their possible primary sources (Stanovoy Range)." Domestic geology, no. 4 (September 25, 2024): 49–66. http://dx.doi.org/10.47765/0869-7175-2024-10019.

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The article presents information on the geology of the Verkhne-Timptonsky gold placer region, within which the Yurskoe placer deposit is located. A brief description of gold placers in the Yurski Stream basin is presented based on geological exploration results. Typomorphic features of native gold from the valley placer of the Yurski Stream were studied. Based on the studies, two types of the native gold were identified, that were related to different primary sources. The high-fineness gold of type I represents residual gold that entered the placer from Precambrian gold-bearing diaphthorites a

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12

Ganja, E. A., A. V. Lalomov, A. V. Chefranova, A. V. Grigor’eva, and L. O. Magazina. "Structural-lithological geological-genetic model and mineral composition of Krasnokutskaya rare-metal-titanium placer deposits (Ukraine)." Литология и полезные ископаемые, no. 6 (November 20, 2019): 540–56. http://dx.doi.org/10.31857/s0024-497x20196540-556.

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The conditions of the occurrence, structure, material composition and controlling factors of Krasnokutsky rare-metal-titanium placer deposit localized in the Miocene sediments of the North-Eastern slope of the Dnieper-Donets basin are investigated. Distinguished lithofacies complexes (alluvial-deltaic, coastal and shallow marine, aeolian) correspond to the Lower (Aquitanian), Middle (Burdigalian) and Upper (Langhian) members of Novopetrovskaya Formation of Miocene. Placer bodies are localized in the littoral marine-coastal complexes of Middle Novopetrovskaya sub-formation. Placerforming proces

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13

Okholina, T. V., N. M. Vnukova, H. O. Kuzmanenko, and O. O. Remezova. "USING THE INTEGRAL INDICATOR TO DETERMINE TI-ZR PRIORITY AREAS OF PLACERS." Geological Journal, no. 3 (September 23, 2024): 79–88. http://dx.doi.org/10.30836/igs.1025-6814.2024.3.284381.

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The article presents the author’s method of selection of priority areas of Ti-Zr placers using an integral indicator. As you know, the integral indicator is the ratio of the total beneficial effect from the development of the deposit to the total costs of operation, it is calculated as the difference between the value of conventional ilmenite (according to the US Geological Survey) (Mineral Commodity..., 2023) and the cost of obtaining overburden and processing the productive layer. Based on the methodology developed and presented in the article, an experiment was conducted on the data of one

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14

Kislov, Evgeniy V., Anna V. Aseeva, Vladislav V. Vanteev, Anton Yurievich Sinyov, and Olga A. Eliseeva. "Naryn-Gol Creek Sapphire Placer Deposit, Buryatia, Russia." Minerals 12, no. 5 (2022): 509. http://dx.doi.org/10.3390/min12050509.

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A new gem corundum occurrence has been discovered in the Naryn-Gol Creek placer of the Dzhida volcanic field (Russia). In this placer deposit, sapphire associates with large crystals of garnet, spinel, augite, olivine, enstatite, ilmenite, Ti-magnetite, and alkali feldspar. Such a combination of minerals is typical for the placer deposits associated with alkali basalts widely distributed in Southeastern Asia and Australia. We have also found sapphire crystals in phonotephrites of the nearby Cenozoic alkali-basalt paleovolcano Barun Khobol Pravyi, and in basalt sample and trachybasalt from the

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15

Lalomov, A. V. "Local Factors of Coastal-Marine Rare-Metal-Titanium Placers Formation." Литология и полезные ископаемые, no. 4 (July 1, 2023): 407–20. http://dx.doi.org/10.31857/s0024497x23700143.

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Local factors of formation of coastal-marine rare-metal-titanium placers were analyzed for creation of the search-oriented geological-dynamic model that allows predicting the prospects of rare-metal-titanium placer mineralization. The influence of the factors on the structure, composition, localization of placer concentrations within sedimentation basins, as well as the dynamic interaction of these factors during the formation of productive sediments was investigated. Based on the work of previous researchers who have studied in detail the issues of controlling the formation of these placers a

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16

Chuiko, V. A., V. A. Sinkin, V. A. Naumov, I. A. Plyusnin, and K. P. Kalinin. "Syuzevskoye diamond placer: A new stage in studying the diamond potential of Western Urals." LITHOSPHERE (Russia) 23, no. 4 (2023): 701–13. http://dx.doi.org/10.24930/1681-9004-2023-23-4-701-713.

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Research subject. Geological features of the structure and composition of the Syuzevskoye diamond placer in the Aleksandrovsky region of the Perm Krai. The placer was found in the border zone of two regional tectonic structures of the Urals: the Western Ural outer folding zone and the Central Ural uplift. This placer was developed within the erosion-karst (?), erosion-structural or tectonically determined Chikman-Nyarskaya depression. Materials and methods. The placer was identified in the period from 2017 to 2022 during a geological study of the subsoil area “Glubokiy” (License PEM 02687 KP L

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17

Prokopiev, S. A., E. S. Prokopiev, I. V. Kadesnikov, and N. A. Cherimichkina. "Current methods of technogenic gold placer deposit mining with small size gold extraction technology." Earth sciences and subsoil use 43, no. 4 (2021): 458–66. http://dx.doi.org/10.21285/2686-9993-2020-43-4-458-466.

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The purpose of this article is to conduct industrial tests of spiral separation technology on technogenic refractory raw materials. The object of the study is the Yurskoye gold placer deposit in the Republic of Sakha (Yakutia). An OKV-100 benefication complex with the productive capacity of 100 m3 /h by initial sands was set up in order to conduct pilot mining of the fine-grained tailings dumps of the Yurskoye deposit with the maximum extraction of small size gold. Sands supplied from the different sections of the technogenic deposit had different gold content, granulometric characteristics, a

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18

Litvinenko, I. S. "GEOCHEMICAL FEATURES OF NATIVE GOLD FROM THE YUGLER MINERAL DISTRICT (NORTH-EAST RUSSIA)." Tikhookeanskaya Geologiya 41, no. 1 (2022): 76–89. http://dx.doi.org/10.30911/0207-4028-2022-41-1-76-89.

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We have used the “Leader” and “PROFILE” software programs to analyze spectral study results for 242 native gold samples from lode deposits and placer relics of the Yugler mineral district. The Yugler black shales host gold mineralization characterized by the geochemical specialization in lead and copper, which assigns it to the style of gold mineralization at the Degdekan deposit but distinguishes it from the majority of similar deposits in Russia and abroad. Native gold in ore bodies and placers displays a distinct geochemical specialization. Native gold from ore bodies is high in As, Bi and

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19

Mykhailov, V. "HIGHLY PROSPECTIVE OBJECTS OF THE MINERAL AND RAW MATERIAL BASE OF UKRAINE. PART 1. METALLIC MINERALS." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (100) (2023): 73–85. http://dx.doi.org/10.17721/1728-2713.100.09.

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A short description of the highly promising mineral and raw material base of metallic minerals of Ukraine is provided. It includes the following deposits and occurrences: complex carbonatite rare metal-apatite Novopoltavske deposit (REE, Nb, Ta, P2O5); complex zirconium-rare-earth-niobium Mazurivske (Oktyabrske) deposit (REE, Zr, Nb); complex rare earth-zirconium Azovske deposit (REE, Zr); Anadolske rare earth deposit (REE); rare earth occurrences Petrovo-Hnutivske (RZE) and Balka Korabelna (RZE); placer complex ilmenite-zirconium deposits Malyshevske (Ti, Zr) and Tarasivske (Ti, Zr); indigeno

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20

Herman, Danny Zulkifli. "Kemungkinan sebaran zirkon pada endapan placer di Pulau Kalimantan." Indonesian Journal on Geoscience 2, no. 2 (2007): 89–97. http://dx.doi.org/10.17014/ijog.2.2.89-97.

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http://dx.doi.org/10.17014/ijog.vol2no2.20073Most alluvium with valued heavy minerals originated from regions of continental shelf, from which recycle process for stable minerals play an important role in transportation and final concentration formation of the minerals. Kalimantan Island as part of continental shelf has a great opportunity to provide condition or environment for placer deposition with zircon content due to: comprising particularly basement rock of calc-alkali to alkali series (granite, granodiorite, tonalite and monzonite) which were suggested as the main supplier sources of z

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21

Kolpakov, V. V., P. A. Nevolko, and P. A. Fominykh. "Mineralogy and primary sources of gold in Davenda-Klyuchevsky ore-placer cluster (Eastern Transbaikalia)." Geologiâ rudnyh mestoroždenij 66, no. 5 (2024): 483–504. https://doi.org/10.31857/s0016777024050044.

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The Davenda-Klyuchevsky ore cluster contains a large number of gold placers and ore occurrences, deposits of gold-sulfide-quartz and gold-bearing Mo-porphyry formations of stockwork and vein types. Judging by the morphology of gold, most placers are closely spatially related to ore sources, but data on the chemical composition of gold from placers and ores are very limited in the literature. A detailed mineralogical and geochemical study of placer gold, which is the subject of this work, provides important genetic information that can be used to predict and search for gold mineralization. It h

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22

Ganzha, O. A., Yu V. Kroshko, and T. V. Okholina. "STRUCTURAL AND LITHOLOGICAL CHARACTERISTICS OF ZIRCON-ILMENITE PLASTERS FROM THE MOKRI-YALY GROUP." Geochemistry and ore formation 44 (2023): 96–109. http://dx.doi.org/10.15407/gof.2023.44.096.

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The article presents the general geological characteristics and paleogeographic conditions of the formation of the Mokri- Yaly group of zircon-ilmenite placers. The studied region is characterized by a complex geological structure and polyfacies composition. The deposits are located in the area of Precambrian folding, that had been complicated by young tectonic shifts. The Tatarske, Manuilske and Zlatoustivske deposits belong to the most promising placers of this group. They represent alluvial and coastal-marine sandy deposits (Oligocene-Miocene). The main placer minerals are ilmenite (17.5—18

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23

Lozhnikov, O., and R. Dychkovskyi. "Justification of multi-section clay storage parameters on the pit internal dump during the integrated use mining of placer deposits." Geo-Technical mechanics, no. 152 (2020): 263–74. http://dx.doi.org/10.15407/geotm2020.152.263.

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Purpose is an establishment of efficient parameters of a multi-section man-made deposit at the pulp clays storage on the surface of internal pit dumps during the development of placer deposits. The analytical research method was used to establish the main parameters of man-made deposits sections depending on their width and depth. A graphical research method was used to establish the downtime duration between formation of the first and second sections of the man-made deposit. It is established that division of the man-made deposit into five sections parallel to the mining front reduces time pe

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Fedorova, Larisa, Anna Lejzerowicz, Gavril Kulyandin, Denis Savvin, and Maksim Fedorov. "Ground penetrating radar investigations of the geological structure of loose sediments at solid mineral deposits." E3S Web of Conferences 192 (2020): 04005. http://dx.doi.org/10.1051/e3sconf/202019204005.

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For effective commercial development of deposits, an increase in the information content of operational exploration is required. In recent years, the range of methods used to obtain complete and reliable information about the structure and properties of the rock mass of a developed field include remote methods of high-frequency electrical prospecting, in particular, the ground penetrating radar (GPR) method. The paper presents a methodological experience in the interpretation of GPR data of sandy river sediments based on the identification of radar facies. In the considered area, four types of

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Chapman, R. J., J. K. Mortensen, M. M. Allan, R. D. Walshaw, J. Bond, and K. MacWilliam. "A New Approach to Characterizing Deposit Type Using Mineral Inclusion Assemblages in Gold Particles." Economic Geology 117, no. 2 (2022): 361–81. http://dx.doi.org/10.5382/econgeo.4863.

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Abstract Mineral inclusions within native gold are features of lode gold occurrences that are preserved in detrital particles. Inclusion assemblages in populations of gold particles in placers from specific localities are revealed through inspection of polished sections, and assimilation of robust data sets permits reconstruction of the lode source mineralogy. Inclusion assemblages differ considerably according to the source deposit type, and various approaches have been employed to graphically represent inclusion mineralogy. We present a simple method for depicting and comparing inclusion ass

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Achyansyah, Muhammad Alif, Baskoro Rochaddi, Alfi Satriadi, et al. "Penggunaan Seismik Refleksi Dalam Pencarian Potensi Endapan Timah di Perairan Laut Bangka." Indonesian Journal of Oceanography 2, no. 4 (2020): 352–62. http://dx.doi.org/10.14710/ijoce.v2i4.9017.

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Indonesia merupakan negara kepulauan yang kaya akan sumber daya alam mineral salah satunya adalah timah, yang tersebar di Perairan Pulau Bangka. Secara umum timah terbentuk oleh pembentukan magma asam akibat proses peleburan kerak benua pada proses kolisi. Timah terbagi menjadi timah primer yang masih dalam bentuk batuan granit dan timah sekunder (placer) merupakan endapan timah primer yang telah mengalami pelapukan akibat proses erosi dan diendapkan di suatu tempat yang tidak jauh dari endapan timah primer. Salah satu metode untuk mengetahui potensi endapan timah adalah dengan menggunakan met

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Khrushchov, Dmytro P., and Olena A. Kravchenko. "MECHANISM OF PLACER FORMATION IN KRASNOKUTSK DEPOSIT AREA." Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine 9 (June 6, 2016): 183–89. http://dx.doi.org/10.30836/igs.2522-9753.2016.144854.

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Stanaway, K. J. "Ten placer deposit models from five sedimentary environments." Applied Earth Science 121, no. 1 (2012): 43–51. http://dx.doi.org/10.1179/1743275812y.0000000020.

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Vinh, Trinh Quoc, Dinh Tran Ngoc Huy, and Sergey Yakutseny. "Analysis of the Yaregskaya Oil with Underlying Deposit "Lower Placer with Genetic Unity, Migration Consequences and Transition of Metals in Oil." Indiana Journal of Agriculture and Life Sciences 2, no. 6 (2022): 1–6. https://doi.org/10.5281/zenodo.7311310.

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<strong>Abstract:</strong> The paper aims to figure out Analysis of the Yaregskaya oil with underlying deposit "lower placer with genetic unity, migration consequences and transition of metals in oil. By using descriptive method for primary model, synthesis methods and process analysis and analysis of difficulties and discussion, The study of this problem point that, In general, assessing the possibility of toxicological impact on the environment of oil Caspian region and the sale of products of their processing, it should be noted a relatively low PTE enrichment for subsalt productive de

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Lavrik, Natalya, Valentina Stepanova, and Alexandra Lavrik. "Platinum and platinoids in the Bolotisty gold-placer deposit (Khabarovsky Krai, Russia)." E3S Web of Conferences 192 (2020): 03012. http://dx.doi.org/10.1051/e3sconf/202019203012.

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The article shows the results of studies the platinum mineralization (within the framework of studying the complexity of deposits) in the waste of heavy concentrate in the southeastern flank of the Bolotisty gold-placer deposit, which the located in the Khabarovsky Krai (Russia). The deposit is localized in the “erosion window” among the covers of Miocene basalts and Eocene andesites, where Cretaceous sedimentary, tuffaceous-sedimentary rocks of the basement of the volcano structure, broken through by an Eocene intrusive body of intermediate and basic composition, come to the surface. An abbre

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Nikol’sky, Alexander M., Sergey A. Shchukin, and Anton I. Konurin. "JUSTIFICATION OF UNDERGROUND TECHNOLOGY OF PLACER GOLD MINING IN THE FAR NORTH." Interexpo GEO-Siberia 2, no. 3 (2021): 342–53. http://dx.doi.org/10.33764/2618-981x-2021-2-3-342-353.

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A significant part of placer mineral deposits in the Arctic zone of Russia urges the need for its strategic development in the near and medium term. Applicably to underground mining of placer gold deposits, the problems of safe and efficient extraction of minerals by mines in the conditions of the Far North are considered. A substantiated choice of uncovering and mining technology for gold-bearing sand strata is proposed in the context of rational planning of mining operations associated with minimizing material and labor costs for uncovering and extracting a part of the deposit, as well as co

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Lalomov, Alexander, Antonina Grigorieva, Alexei Kotov, and Lidiya Ivanova. "Typomorphic Features and Source of Native Gold from the Sykhoi Log Area Placer Deposits, Bodaibo Gold-Bearing District, Siberia, Russia." Minerals 13, no. 5 (2023): 707. http://dx.doi.org/10.3390/min13050707.

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The Bodaibo gold-bearing district in the Lena gold province of Siberia is one of the largest and oldest placer gold-bearing provinces in the world. Approximately 1650 tons of gold has been extracted from the region. Precise studies on the source of these unique placer deposits are lacking and still controversial. Native gold from four different locations was gathered to investigate its morphology, chemical signatures, structure and inclusions. Some data on primary bedrock mineralization were obtained from the published literature. The linear weathering crusts developed along the zones of disju

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Ramakrishnan, C., R. Mani, and D. S. Suresh Babu. "Ilmenite from the Chavara deposit, India: a critical evaluation." Mineralogical Magazine 61, no. 405 (1997): 233–42. http://dx.doi.org/10.1180/minmag.1997.061.405.06.

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AbstractThe mineralogical status of ilmenite from a prominent modern placer deposit of India is illustrated using different techniques. Compositional, powder XRD, TGA and SEM analyses prove that consistent low temperature alteration took place in Chavara ilmenite leading to the formation of a pseudorutile-hydrated-ilmenite stage. Except for the indication of a geochemical zonation at the southern tip of the deposit, the Chavara ilmenite points to a common origin throughout its 22 km stretch along the coast. We advocate a major segregation activity by marine factors to the accumulated sediments

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Kim, Kwanho, and Soobok Jeong. "Separation of Monazite from Placer Deposit by Magnetic Separation." Minerals 9, no. 3 (2019): 149. http://dx.doi.org/10.3390/min9030149.

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In this study, mineralogical analysis and beneficiation experiments were conducted using a placer deposit of North Korea, on which limited information was available, to confirm the feasibility of development. Rare earth elements (REEs) have vital applications in modern technology and are growing in importance in the fourth industrial revolution. However, the price of REEs is unstable due to the imbalance between supply and demand, and tremendous efforts are being made to produce REEs sustainably. One of them is the evaluation of new rare earth mines and the verification of their feasibility. A

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Bashirov, Vladilen Eduardovich, Peter Vasilevich Kazakov, Alexander Vladimirovich Snachev, Ruslan Azatovich Gataullin, and Mikhail Anatolyevich Rassomakhin. "Features of the Tanalyk gold placer and its primary sources (the Baymak ore-placer cluster, Southern Urals)." Geologicheskii vestnik, no. 1 (March 25, 2024): 50–63. http://dx.doi.org/10.31084/2619-0087/2024-1-4.

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The article presents the results of a study of the Tanalyk placer, which is part of the Baymak ore-placer cluster. It is shown that gold is predominantly bright yellow in color and has lump-shaped, wedge-shaped, plate-shaped and wire-rod-shaped forms. In terms of granulometric composition, it belongs to the large and medium class and is characterized mainly by medium roundness. The uniformity of morphological varieties of gold in different lithological and stratigraphic horizons indicates the inheritance of gold from ancient deposits to young ones. Placer gold is of high quality and has

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Ganzha, О. A., Yu V. Kroshko, and H. O. Kuzmanenko. "ORE-BEARING OF THE LIVOBEREZHNY ZIRCON-RUTILE-ILMENITE PLACER DISTRICT." Geological Journal, no. 4 (December 28, 2022): 83–100. http://dx.doi.org/10.30836/igs.1025-6814.2022.4.255682.

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The relevance of the presented publication is due to the need to highlight the current state of zirconium-titanium specialization objects, the need to modernize and unify geological information, due to the significant increase in the world community’s interest in minerals that belong to the group of critical raw materials. The article presents generalized data on the ore-bearing zircon-rutile-ilmenite deposits of the Livoberezhniy placer district of the Ukrainian placer province. This area has unique paragenetic characteristics, as it is located in the junction zone of three geostructural unit

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Idrus, Arifudin, I. Nur, I. W. Warmada, and Fadlin Fadlin. "Metamorphic Rock-Hosted Orogenic Gold Deposit Type as a Source of Langkowala Placer Gold, Bombana, Southeast Sulawesi." Indonesian Journal on Geoscience 6, no. 1 (2011): 43–49. http://dx.doi.org/10.17014/ijog.6.1.43-49.

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DOI: 10.17014/ijog.v6i1.114In 2008, placer gold was discovered in Langkowala area (Bombana Regency), Southeast Sulawesi, Indonesia, and more than 60,000 traditional gold miners in the early 2009 have been operating by digging vertical pits and panning active stream sediments. The grade of placer gold ranges from 50 to 140 g/t. Local geological framework indicates that the placer gold is not related to volcanic rock-related hydrothermal gold deposit, e.g. epithermal, skarn or porphyry. This paper describes a preliminary study on possible primary deposit type as a source of the Langkowala (Bomba

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Migachev, Igor, Olga Minina, and Vadim Zvezdov. "Typomorphic gold features as criteria of placer association with primary gold-silver-type sources (example from Mnogovershinnoye ore placer cluster)." Domestic geology, no. 4-5 (October 26, 2020): 3–23. http://dx.doi.org/10.47765/0869-7175-2020-10020.

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A comprehensive study of native gold from Mnogovershinnoye gold cluster ores and placers (granulometry, crystal morphology, internal structure, nature of exogenetic transformations, fineness and trace element composition) was performed to define placer association with primary sources. Using ICP-MS method and X-ray spectrographic analysis, new data on geochemical gold features was obtained, which expands and clarifies the evidence of gold typomorphism from a gold-silver deposit primary source and its association with placers.

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Yablokova, Svetlana, Georgiy Samosorov, and Natalia Pozdnyakova. "Typomorphic gold features as criteria of placer association with primary gold-silver-type sources (example from Mnogovershinnoye ore placer cluster)." Domestic geology, no. 4-5 (October 26, 2020): 24–38. http://dx.doi.org/10.47765/0869-7175-2020-10021.

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A comprehensive study of native gold from Mnogovershinnoye gold cluster ores and placers (granulometry, crystal morphology, internal structure, nature of exogenetic transformations, fineness and trace element composition) was performed to define placer association with primary sources. Using ICP-MS method and X-ray spectrographic analysis, new data on geochemical gold features was obtained, which expands and clarifies the evidence of gold typomorphism from a gold-silver deposit primary source and its association with placers.

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Nazzareni, Sabrina, Simona Alunno, Federica Zaccarini, et al. "Characterization of Gold of the Murcielago Fluvial Placer (Central Honduras) and Its Possible Primary Sources." Geosciences 13, no. 6 (2023): 175. http://dx.doi.org/10.3390/geosciences13060175.

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The Murcielago gold placer is located in the Lepaguare Valley, Olancho Department (Central Honduras). The placer mineralogy includes silicates (quartz, garnets, amphibole, Ca-pyroxene, micas, epidote, and tourmaline); calcite; and in the heavy fraction, zircon, ilmenite–rutile, magnetite, hematite, cassiterite, and cinnabar. Gold grains recovered from the Murcielago placer production plant are mainly flattened grains with a moderately to high elliptical shape. The composition of the gold grains varies continuously in the range Au46Ag54 to Au88Ag12. Few of them are characterized by Au-rich rims

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Zhuravlev, A. I., A. V. Okrugin, B. B. Gerasimov, et al. "Native gold from placers of the Evotinskii region (Aldano-Stanovoy Shield): mineralogical and geochemical features, and possible primary sources." Arctic and Subarctic Natural Resources 29, no. 4 (2024): 511–26. https://doi.org/10.31242/2618-9712-2024-29-4-511-526.

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The Evotinskii Ore and Placer Region (EOR) is located in the central part of the Aldano-Stanovoy Shield and is characterized by a significant presence of gold-bearing placers, many of which have undergone extensive mining activities. Despite geological investigations that have been conducted since the 1930s, the main sources of numerous placers remain largely unidentified. This study employed traditional mineralogical and geochemical methods, along with LA-ICP-MS analysis, to investigate placer gold within the Evotinskii Ore and Placer Region. The findings indicate that native gold within the

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42

Kovlekov, I. I. "Development of placer deposits in the North using highwall mining systems." Mining Industry Journal (Gornay Promishlennost), no. 5/2021 (November 12, 2021): 84–89. http://dx.doi.org/10.30686/1609-9192-2021-5-84-89.

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The article studies various aspects of the highwall mining systems applicability for the development of productive sands in terms of the occurrence conditions as well as the mining and technical parameters of placer deposits. The harsh climatic conditions of the Arctic zone and the specific properties of frozen sands impose additional requirements on the operation of the mining complex. Positive and negative aspects of the practical application of mining complexes been analysed with reference to the development of precious metals and gemstones deposits. The most promising mining sites have bee

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Chefranov, R. M., A. V. Lalomov, and A. V. Chefranova. "SEARCH-ORIENTED TECHNIQUE OF THE NUMERICAL FORECASTING OF THE RARE-METAL PROXIMAL (NEAR DRIFT) PLACERS: EVIDENCE FROM THE LOVOZERO PLACER DISTRICT." Геология рудных месторождений 65, no. 2 (2023): 138–51. http://dx.doi.org/10.31857/s0016777023020016.

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Rare metals (including rare earth metals) are significant raw materials which determine technical and scientific level of development of the industry; first of all – innovative technologies. An important source of rare metals can be a group of unique in genesis and mineral composition of loparite placers associated with the Lovozero massif of nepheline syenites (Cola peninsula). In the present work Within the Northern periphery of the Lovozero massif, which includes the Revda placer deposit, the authors have identified the main factors controlling the formation of proximal (near drift) rare-me

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Lozhnikov, Oleksii, Oleksandr Shustov, Maksym Chebanov, and Tetiana Perkova. "Methodological principles of the selection of a resource-saving technology while developing water-bearing placer deposits." Mining of Mineral Deposits 16, no. 3 (2022): 115–22. http://dx.doi.org/10.33271/mining16.03.115.

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Purpose. The present paper aims to develop methodological principles for the selection of effective parameters of resource-saving technologies while developing water-bearing titanium-zirconium deposits basing on the complex of analytical studies. Methods. The paper applies a complex of research methods: analytical – to analyze and generalize the main differences of the development technology for water-bearing placer deposits and problem statement; technical-economic analysis for identifying the effect of a resource-saving technology on the indices of land use of the open-pit mining and involve

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Huang, Wenqing, Pei Ni, Ting Shui, et al. "Trace Element Geochemistry and Mineral Inclusions Constraints on the Petrogenesis of a Marble–Hosted Ruby Deposit in Yunnan Province, China." Canadian Mineralogist 59, no. 2 (2021): 381–408. http://dx.doi.org/10.3749/canmin.2000054.

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ABSTRACT Primary rubies in the Ailao Shan of Yunnan Province, China, are found in three layers of marble. However, the origin and source rocks of placer rubies in the Yuanjiang area remains unclear. Trace element geochemistry and inclusion mineralogy within these materials can provide information on their petrogenesis and original source. Zircon, rutile, mica group minerals, titanite, and apatite group minerals were the main solid inclusions identified within the placer Yuanjiang rubies, along with other mineral inclusions such as pyrite, pyrrhotite, plagioclase group minerals, and scapolite g

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Lozhnikov, O., and R. Dychkovskyi. "Substantiation parameters of man-caused deposit in pit internal dumpat the placer deposits surface mining." Collection of Research Papers of the National Mining University 62 (2020): 39–52. http://dx.doi.org/10.33271/crpnmu/62.039.

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Sowptika, P., and G. Anilkumar. "The bacterial population inhabiting a top-ranking High Background Radiation Area: A first-time report." Journal of Environmental Biology 44, no. 1 (2023): 45–56. http://dx.doi.org/10.22438/jeb/44/1/mrn-5018.

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Aim: To study the soil bacterial population inhabiting the High Background Radiation Area (HBRA) of Chavara-Neendakara placer deposits, Kerala, India. Methodology: The study was performed by culture-dependant methods involving isolation and characterization of microbes through plate culturing and sequencing the 16S rDNA primed PCR amplicons. Results: Histochemical observations and molecular taxonomic studies through BLAST search, multiple sequence alignment of the sequences and SeaView phylogenetic analyses, resulted in identification of 35 bacterial species belonging to 22 genera. Shannon-Sim

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Vyatkin, S. V., G. Y. Kriulina, L. D. Bardukhinov, and V. K. Garanin. "Diamonds of the Morgogor placer (Anabar, Yakutia)." LITHOSPHERE (Russia) 23, no. 4 (2023): 672–82. http://dx.doi.org/10.24930/1681-9004-2023-23-4-672-682.

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Research subject. The placer diamond deposit of the Morgogor River, Anabar, Yakutia. The geological history of this deposit has not been reliably established, and the root sources remain unknown. Aim. To describe the mineralogical and spectroscopic characteristics of diamonds from the Morgogor river deposit in comparison with the previously studied diamonds from the Ebelyakh river placer. To divide the studied diamonds into genetic groups, presumably reflecting the primary sources of demolition, according to the distribution of A-centers. To assess the stability of mineralogical and spectrosco

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Tsymbal, S. M., D. P. Khrushchov, and О. P. Lobasov. "DIGITAL STRUCTURAL-LITHOLOGICAL MODEL OF TARASIVSKE TITANIUM-ZIRCONIUM PLACER DEPOSIT." Geological Journal, no. 1 (May 31, 2016): 81–93. http://dx.doi.org/10.30836/igs.1025-6814.2016.1.97275.

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Aseeva, A. V., and E. V. Kislov. "Sapphire of the Naryn-Gol Creek Placer Deposit (Buryatia, Russia)." IOP Conference Series: Earth and Environmental Science 720, no. 1 (2021): 012011. http://dx.doi.org/10.1088/1755-1315/720/1/012011.

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