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Journal articles on the topic 'Placer deposits'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 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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2

Pitty, Alistair F. "Placer deposits symposium." Journal of the Geological Society 142, no. 4 (1985): 709–10. http://dx.doi.org/10.1144/gsjgs.142.4.0709.

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3

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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4

JAMSRANDORJ, G., and SERGUEI A. DIATCHKOV. "Placer Deposits of Mongolia." SEG Discovery, no. 24 (January 1, 1996): 1–14. http://dx.doi.org/10.5382/segnews.1996-24.fea.

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Editor’s note: Smimov uses the weathering definition of eluvial, meaning “an accumulation of rock debris produced*in-place by decomposition or disintegration of rock; a residue.” Two other terms in Smimov’s classification are not in common usage in North America nor in North American placer classification schemes By Russian definition, diluvium is an accumulation of fragments on the surface of slopes close to the source rock, predominantly moved by gravity. In North America, proluvium is a “complex, friable deltaic sediment accumulated at the fool of a slope as a result of an occasional torren

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5

Melchiorre, Erik B., Ryan Mathur, George Kamenov, and Jorge Paredes. "Geochemical Overprinting and Secondary Placer Crystal Formation in the La Cholla District, Quartzsite, Arizona, USA: Evidence from Copper Isotopes, Morphology, and Trace Elements." Minerals 13, no. 11 (2023): 1444. http://dx.doi.org/10.3390/min13111444.

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Geochemical overprinting on placer gold deposits produces complex deposits with apparently paradoxical geochemical and morphological attributes. The La Cholla placer gold deposits near Quartzsite, Arizona, USA, contain sharp and often undamaged gold crystals within high-energy gravels as a result of postdepositional recrystallization by localized hot springs. Geothermal fluids emanated from a basin-bounding fault and left a distinct signature that includes recrystallized gold with low Pb and δ65Cu > 1.14‰, secondary uraninite and carnotite, travertine deposits, and mounds of highly silicifi

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6

Pidvysotskyi, V. T., N. M. Ostafychuk, and S. I. Bashinsky. "PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS." Geological Journal, no. 1 (March 29, 2023): 17–38. http://dx.doi.org/10.30836/igs.1025-6814.2023.1.273683.

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This article reviews information from published papers and studies by the authors about placer diamond deposits. Original data were obtained in result of field and laboratory-analytical work carried out in various countries of Africa and South America. The main types of placer diamond deposits – fluvial, fluvioglacial, eolian, and man-made – have been considered and characterized. The main attention is given to fluvial continental placers, which are the most diverse, well-studied and have the greatest industrial importance. Primary, secondary and mixed deposits are distinguished according to t

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7

Syafrizal, AYA Hakim, and A. Sulastri. "Geochemical Distribution of REE and Grain Size Analysis of Heavy Mineral Associated with Tin Placer-Type Deposit, Bangka." IOP Conference Series: Earth and Environmental Science 1031, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1755-1315/1031/1/012008.

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Abstract Indonesia is included in the East Malaya Block of the Southeast Asian Tin Belt. Two types of tin deposits in Indonesia are primary and secondary tin deposits (placer). Factors that can cause the formation of placer tin deposits include S-type granite, weathering, transportation, and sedimentation. Factors that control the formation of placer tin deposits include the presence of source rock (granite type S), weathering processes, erosion, transportation and sedimentation, and the presence of basins or valleys where weathering materials are deposited. The transportation process has a ma

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8

RAGHUPATRUNI, BHIMA RAO. "Preconcentration of Placer Critical Minerals from Red Sand Dunes." Journal of Geointerface 3, no. 2 (2024): 50–63. https://doi.org/10.5281/zenodo.14173307.

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In the current research, it is proposed that the Vertical Shaft Kiln (VSK) separator, an innovative air classifier, be implemented   before the introduction of samples into wet processing circuits such as scrubbing and spirals. This measure aims to mitigate environmental pollution in the downstream marine environment. The incorporation of an air classifier allows for the removal of undesirable slimes that contribute to pollution, which constitute 9.8% by weight, including 5.3% Light Heavy Minerals (LHM). These LHM are non-commercial gangue minerals, comprising pyroxenes and amphibole

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9

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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10

Alenichev, V. M., and M. V. Alenichev. "Enhancing geopotential of placer deposits." MINING INFORMATIONAL AND ANALYTICAL BULLETIN 8 (2018): 16–25. http://dx.doi.org/10.25018/0236-1493-2018-8-0-16-25.

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11

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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12

Nahan, Gusfrimanuel, Satria Bijaksana, Putu Billy Suryanata, and Khalil Ibrahim. "GEOCHEMICAL AND MAGNETIC CHARACTERISTICS OF PLACER GOLD DEPOSITS FROM CENTRAL KALIMANTAN, INDONESIA." Rudarsko-geološko-naftni zbornik 38, no. 2 (2023): 99–107. http://dx.doi.org/10.17794/rgn.2023.2.7.

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Massive tailings have resulted from the extensive use of placer deposits in Central Kalimantan, Indonesia, by artisanal and small-scale gold mining (ASGM) activities. Recently, the placer deposits and their tailings have been exploited for heavy minerals. In this study, geochemical and magnetic analyses were carried out on these deposits to identify the prospect of REE (rare earth element) exploration in the materials already collected by ASGM activities. Samples were collected from ten different locations. For each location, two different fractions were prepared for analyses, i.e. the heavy m

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13

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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14

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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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

Komliev, O. O., and S. V. Zhylkin. "MESOZOIC-CENOZOIC MOTPHOLITHOGENESIS OF THE UKRAINIAN SHIELD (WITHIN THE IRSHANSKY PLACER FIELD)." Ukrainian Geographical Journal, no. 1 (2022): 27–35. http://dx.doi.org/10.15407/ugz2022.01.027.

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The article presents the results of the study of Mesozoic-Cenozoic motpholithogenesis of the of the Ukrainian shield, within the Irshansky placer development field of titanium deposits of the Ukrainian sub-province of placer province of Eastern Europe. The morpholitogenetic approach expands the methodology and methodical possibilities of geomorphological research. The method of processing analyzes of granulometry and chemical composition of ilmenite, calculation of quantitative indicators that parameterize the granulometric field and the field of variability of ilmenite, integrating the root r

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17

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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18

McLemore, Virginia T. "Placer gold deposits in New Mexico." New Mexico Geology 16, no. 2 (1994): 21–25. http://dx.doi.org/10.58799/nmg-v16n2.21.

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19

Nikiforova, Zinaida. "Criteria for Determining the Genesis of Placers and Their Different Sources Based on the Morphological Features of Placer Gold." Minerals 11, no. 4 (2021): 381. http://dx.doi.org/10.3390/min11040381.

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Based on the identified typomorphic features of placer gold, a set of determined morphogenetic criteria is proposed to identify the genesis of placer gold content and different sources in the platform areas, which allow more correctly selecting search methods and improving the efficiency of forecasting ore and placer gold deposits. Gold particles larger than 0.25 mm with signs of wind-worn processing indicate the formation of autochthonous aeolian placers. Gold particles with signs of wind-worn processing with a size of 0.1–0.25 mm, forming an extensive halo of dispersion, indicate the formati

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20

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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21

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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22

Lalomov, Alexander V., Ildar R. Rakhimov, and Antonina V. Grigor’eva. "Chromite placer occurrences of the Volga-Ural basin – genesis, sources and industrial potential." Georesursy 23, no. 3 (2021): 143–48. http://dx.doi.org/10.18599/grs.2021.3.17.

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Chromium is a strategic metal, but more than a half of Russia’s needs are met by imports, so new deposits of chromites, including unconventional placer deposits, are of industrial and scientific interest. Previous studies and current works of the authors of the article have established the chromite placer metal content of Permian-Jurassic deposits of the Volga-Ural basin, which has industrial and potential significance: within the Lukoyanovsky placer area (Nizhny Novgorod region), the industrial chromite content of Jurassic coastal-marine titanium-zirconium placers has been established; in the

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23

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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24

Davydov, V. A. "THE USE OF ELECTROMETRY METHODS IN THE STUDY OF GOLD PLACER DEPOSITS IN THE KHABAROVSK TERRITORY." Tikhookeanskaya Geologiya 42, no. 3 (2023): 38–51. http://dx.doi.org/10.30911/0207-4028-2023-42-3-38-51.

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The article presents the results of applying geophysical methods in the study of placers of various genetic types in the Khabarovsk Territory. The main research methods are vertical electrical and remote induction sounding. Geophysical studies of alluvial placers were carried out along river valleys, at the watersheds and small streams of the Turchikansky lode-and-placer gold cluster. The main tasks to be solved are the search for potential structural traps of gold (paleoriverbeds, ravines), determination of the nature of the bedrock surface and the thickness of the overlying loose deposits. T

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25

Lomakin, I. E., E. A. Sarvirov, and V. V. Kochelab. "Current issues of search of gold placers in the south of Ukraine." Geology and Mineral Resources of World Ocean 16, no. 4 (2020): 32–40. http://dx.doi.org/10.15407/gpimo2020.04.032.

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The main gold ore territory of Ukraine is Ukrainian shield, mainly its central and eastern parts. Currently, the potential of Ukrainian shield is estimated at 2.4 thousand tons of gold. Gold ore deposits are insufficiently studied and not brought to development. The same can be said about the development of gold placers. But in the case of shallow deposits its study and development may be economically justified, it does not require large capital investments and allows to recoup costs in a short time. This is especially true given the extremely favorable situation on the world gold market in re

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26

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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Minter, W. E. L., and D. Craw. "A special issue on placer deposits; preface." Economic Geology 94, no. 5 (1999): 603–4. http://dx.doi.org/10.2113/gsecongeo.94.5.603.

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28

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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29

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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30

Hughes, Martin J., G. Neil Phillips, and Stephen P. Carey. "Giant Placers of the Victorian Gold Province." SEG Discovery, no. 56 (January 1, 2004): 1–18. http://dx.doi.org/10.5382/segnews.2004-56.fea.

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ABSTRACT The Victorian gold province has yielded 2500 tonnes (t) Au, nearly 2 percent of cumulative world gold production, mostly mined between 1851 and 1910. Fifty-five percent (1375 t) was placer gold from modern and paleostream systems, and from eluvial deposits, and the remainder came from primary quartz vein-related deposits. Most of the alluvial gold placers are in unconsolidated or weakly cemented quartz pebble conglomerate and gravel, dominated by hydrothermal quartz, although a few paleoplacers are within duricrusted conglomerate that required crushing. Large and abundant gold nuggets

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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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32

Abakumov, Igor’ Viktorovich. "On the issue of improving forecasting and prospecting complexes for identifying new sources of acutely scarce mineral raw materials (using the example of placer boulder chromium ores)." NEWS of the Ural State Mining University, no. 3 (September 15, 2023): 55–63. http://dx.doi.org/10.21440/2307-2091-2023-3-55-63.

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Te purpose of the work is to improve forecasting and search complexes to identify new sources of extremely scarce mineral raw materials for the Russian industry. Research methodology. Analysis of the available information on the features of the geological structure and conditions for the placement of shallow slope placers of boulder chromium ores, reconstruction of the buried relief of the bedrock, study of the structural features of the bedrock and modern (daytime) surface of the placers using analytical methods (trend analysis, etc.), study of the spatial variability of the estimated paramet

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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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34

Paktovsky, Y. G. "Loess doll from Pleistocene loess-like sediments in the Vishera diamond-bearing area (Perm region)." Vestnik of North-Eastern Federal University Series "Earth Sciences", no. 1 (March 25, 2024): 31–38. http://dx.doi.org/10.25587/2587-8751-2024-1-31-38.

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The purpose of the study is to investigate the cranes from loess-like deposits as indicator formations for the glacial epochs of the late Pleistocene – Holocene using current lithology methods. The motivating reason for the study was that loess-like deposits directly “seal” the industrial placer of the Silurian diamond-bearing reservoir in the Vishera diamondiferous region.Loess doll (loess pupae, dutiki) are concretions weakly cemented by iron hydroxides, consisting of quartz grains with an admixture of fine-silty feldspars. In terms of granulometry and mineral composition, the cranes corresp

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35

Moskvitin, S. G. "Technogenic Placer Deposits of the Artic Zone of Yakutia." IOP Conference Series: Earth and Environmental Science 988, no. 2 (2022): 022037. http://dx.doi.org/10.1088/1755-1315/988/2/022037.

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Abstract The northern parts of the Arctic Zone of the Sakha Republic (Yakutia) are the most industrialized regions of the Republic. Since the 1930s, there has been intensive mining of alluvial and primary tin and gold placers. The 60-70-year mining operation has accumulated huge mining residues in the region, leaving behind useful components owing to deficiencies in mining technology at the time and deviations from mining technology. These wastes are considered technogenic placer deposits. The study of these wastes has identified the following types of technological s: 1 – technogenic placers

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Latysheva, M. A. "Current state, prospects and problems of the gold mining industry of the Trans-Baikal Territory." IOP Conference Series: Earth and Environmental Science 962, no. 1 (2022): 012023. http://dx.doi.org/10.1088/1755-1315/962/1/012023.

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Abstract The article considers the current state, problems and prospects of gold mining in the Trans-Baikal Territory. There has been an increase in the volume of gold production from ore and placer deposits over the past 5 years. Placer deposits make up a significant part of the total production volume. The reduction of reserves in placers and the decrease in the quality of minerals in them open up new prospects for the extraction of precious metals, namely in ore gold mining. The extraction of placer gold, even with the best existing technologies, remains a sector of high environmental risk,

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Lomakin, I., E. Sarvirov, and V. Kochelab. "Features of Gold Placer Formation in the Ukrainian Crystalline Shield And Southern Ukraine." EARTH SCIENCES AND HUMAN CONSTRUCTIONS 3 (November 7, 2023): 90–98. http://dx.doi.org/10.37394/232024.2023.3.8.

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The presence of numerous native gold deposits of the Ukrainian Crystalline Shield (UCS), as well as the spread of placer gold manifestations, determines the high probability of the formation here of gold placers with industrial parameters. The main factors and geological conditions that contribute to the formation of gold placers are manifested at the UCS. An important reason for the failures of previous geological works is the outdated scientific and methodological platform, which involved the search for typical gold-bearing deposits with metal of gravity size classes. They did not take into

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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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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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LOMAKIN, I. E., Ye A. SARVIROV, and V. V. KOCHELAB. "Peculiarities of search for placer deposits of gold of the south of Ukraine." Geology and Mineral Resources of World Ocean 17, no. 2 (2021): 22–33. http://dx.doi.org/10.15407/gpimo2021.02.022.

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The long-term high level of world gold prices against the background of depletion of reserves with easily extracted metal leads to the search for and introduction into industrial development of deposits, even with low-tech ores and sands. This, in turn, requires the introduction of effective technologies for the enrichment and extraction of gold, contributes to the improvement of methods of exploration. At present, numerous manifestations of placer gold of various scales are known in the sedimentary strata of Meso-Cenozoic deposits in the south of Ukraine. But the real picture of the distribut

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Alam, Muhammad, Javed Akhter Qureshi, Garee Khan, et al. "The Process Designing of Gold Extraction from Placers of Passu to Shimshal (Hunza Valley) Gilgit-Baltistan by Mercury Amalgamation and Cyanidation Leached Method." International Journal of Economic and Environmental Geology 10, no. 4 (2020): 25–29. http://dx.doi.org/10.46660/ijeeg.vol10.iss4.2019.348.

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Gold wash through panning or washing in the fluvial sediments or sands is done on the river banks inSkardu, Hunza and other places. The method of gold washing is very crude, primitive and most of the gold is washedaway back into the river. The current study mainly focused on extraction of placer gold deposits. Pneumatic machinesfrom Passu to Shimshal (Hunza valley) Gilgit-Baltistan. The mercury amalgamation and cyanide leached methods havebeen used for placer gold deposits extraction from the concentrate obtained from shaking table. The amount of goldrecovered from amalgamation method with mer

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Alam, Muhammad, Javed Akhter Qureshi, Garee Khan, et al. "The Process Designing of Gold Extraction from Placers of Passu to Shimshal (Hunza Valley) Gilgit-Baltistan by Mercury Amalgamation and Cyanidation Leached Method." International Journal of Economic and Environmental Geology 10, no. 4 (2020): 25–29. http://dx.doi.org/10.46660/ojs.v10i4.348.

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Gold wash through panning or washing in the fluvial sediments or sands is done on the river banks inSkardu, Hunza and other places. The method of gold washing is very crude, primitive and most of the gold is washedaway back into the river. The current study mainly focused on extraction of placer gold deposits. Pneumatic machinesfrom Passu to Shimshal (Hunza valley) Gilgit-Baltistan. The mercury amalgamation and cyanide leached methods havebeen used for placer gold deposits extraction from the concentrate obtained from shaking table. The amount of goldrecovered from amalgamation method with mer

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Makarov, V. N. "Formation of technogenic hydrochemical flows during the development of tin deposits in the Arctic regions of Yakutia." Arctic: Ecology and Economy 14, no. 4 (2024): 549–61. https://doi.org/10.25283/2223-4594-2024-4-549-561.

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The article analyzes the results of studying technogenic hydrochemical dispersion flows arising during the development of ore and placer tin deposits in the Arctic regions of the North-East of Yakutia. Most of the large tin deposits are located beyond the Arctic Circle: primary (Deputatskoye, Dyakhtardakhskoye, Kester, Ulakhan-Egelyakhskoye, Churpunnya, Ege-Khaya) and placer (Smolnikova, Tasappa, Tirekhtyakh, Chokurdakhskaya) deposits. Development of tin deposits leads to a sharp change in the chemical composition of natural waters and the formation of extensive technogenic hydrochemical flows

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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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Angusamy, N., J. Dajkumar Sahayam, M. Suresh Gandhi, and G. Victor Rajamanickam. "Coastal Placer Deposits of Central Tamil Nadu, India." Marine Georesources & Geotechnology 23, no. 3 (2005): 137–74. http://dx.doi.org/10.1080/10641190500192102.

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Angusamy, N. "Placer Deposits of Southern Tamil Nadu Coast, India." Marine Georesources & Geotechnology 24, no. 2 (2006): 77–102. http://dx.doi.org/10.1080/10641190600704350.

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Tan, Teong Hing, and Kin Leong Lim. "Environment of placer gold deposits in northern Pahang." Bulletin of the Geological Society of Malaysia 26 (April 30, 1990): 1–11. http://dx.doi.org/10.7186/bgsm26199001.

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Sutherland, Donald G. "Geomorphological controls on the distribution of placer deposits." Journal of the Geological Society 142, no. 5 (1985): 727–37. http://dx.doi.org/10.1144/gsjgs.142.5.0727.

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Litvintsev, Viktor, Vladimir Alekseyev, and Irina Kradenykh. "The technology of development of residue objects of precious metals placer deposits." E3S Web of Conferences 56 (2018): 01005. http://dx.doi.org/10.1051/e3sconf/20185601005.

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The domestic and foreign experience has been analyzed, showing that the problem of development of geographically close residue goldore deposits was practically not investigated. The necessity of finding new methodological and technological-economic approaches to effective and large-scale integrated management of territorially-contiguous residue placer deposits has been substantiated. A number of methodological provisions for the substantiation of this approach have been proposed, an algorithm and a computer program complex has been developed for calculating the technical and economic indicator

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Savva, Natalia E., Raisa G. Kravtsova, Galina S. Anisimova, and Galina A. Palyanova. "Typomorphism of Native Gold (Geological-Industrial Types of Gold Deposits in the North-East of Russia)." Minerals 12, no. 5 (2022): 561. http://dx.doi.org/10.3390/min12050561.

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This study presents the typomorphic features of native gold grains from three different geological-industrial types (GIT) of gold deposits in the North-East of Russia: (1) gold–arsenic-sulfide in black shale strata (Natalka, Degdekan, Karalveem, Maldyak deposits), (2) gold–quartz veins in granitoids (Dorozhnoye, Butarnoye, Shkolnoye, Maltan deposits), and (3) gold–silver adularia in volcanogenic strata (Kupol, Olcha, Kubaka, Burgali, Primorskoe, Dalnee deposits). The reliability of the geological interpretation is directly related to mineral associations, fineness variations, its internal stru

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