PROSPECTS FOR THE DEVELOPMENT OF THE GOLD MINING INDUSTRY OF UZBEKISTAN AT THE MODERN STAGE

2020 ◽  
Vol 1 (3) ◽  
pp. 37-41
Author(s):  
Oydinkhon akhtiyorzoda ◽  
Keyword(s):  
Rare Earth ◽  
Gold Mining ◽  
Rare Earth Metals ◽  
Mining Industry ◽  
The Past ◽  
Gold Industry ◽  
Further Development

The Article considered propects of the development of gold industry of Uzbekistan,which has received over the past two years a powerful push for further development. Analized the experience and achievements in the extraction of gold and other rare earth metals in Uzbekistan.

scholarly journals Conditions Affecting the Release of Heavy and Rare Earth Metals from the Mine Tailings Kola Subarctic

Toxics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 163
Author(s):  
Eugenia Krasavtseva ◽  
Victoria Maksimova ◽  
Dmitry Makarov
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Inductively Coupled Plasma ◽  
Risk Index ◽  
Rare Earth Metals ◽  
Hazard Index ◽  
Mining Industry ◽  
Potential Ecological Risk ◽  
Dust Particles ◽  
Geotechnical Characteristics

In the Kola Subarctic, a mining industry has developed, which is a source of environmental pollution with heavy metals. The objects of study were the tailings of three large mining enterprises in the region: apatite-nepheline, complex and loparite ores. The geotechnical characteristics were studied, and the granulometric composition of the samples was established. The main minerals that make up the material of ore dressing tailings have been determined. Using inductively coupled plasma mass spectrometry, the content of trace elements, in particular heavy metals and rare earth elements, has been established. The enrichment factor, the geoaccumulation indexes, the potential ecological risk index factor and the potential environmental hazard index have been calculated. Priority pollutants characteristics for specific objects have been identified. It is noted that the finely dispersed material of the tailings of loparite and complex ores is 1.5–3 times enriched in heavy and rare earth metals in comparison with the total material of the tailings. In laboratory conditions, experiments were carried out to simulate the process of interaction of dust particles with soil solutions containing different amounts of dissolved organic matter and at average seasonal temperatures. It was found that a decrease in the pH of the solution and an increase in the amount of organic carbon and temperature lead to the mobilization of heavy and rare earth metals from the tailings.

scholarly journals On the geological and economic assessment of the Lower Amur region (Russia)

2020 ◽  
Vol 192 ◽  
pp. 03013
Author(s):  
Viktor Kryukov ◽  
Irina Kradenykh
Keyword(s):  
Gold Mining ◽  
Construction Materials ◽  
Mining Industry ◽  
Mineral Resources ◽  
Economic Assessment ◽  
Resource Base ◽  
The Past ◽  
Steady Growth ◽  
Mineral Wealth

The development of regional economy is based on medium and long-term strategies (programs) for economic industrialization. These documents are of a sectoral or integrated nature. Republic of Sakha (Yakutia) and Kamchatka Territory have a scientifically substantiated strategy for the development of the mining industry. Despite its absence in Khabarovsk Territory, subsoil use in recent years has shown a steady growth in mining. The main volume of income comes from gold mining mainly in the northern and central parts of the region. Over the past 10 years, the most economically advantageous and geographically accessible minerals have been identified in the region. These include: coal, gold, platinum, tin, construction materials, groundwater. In the future, it is necessary to plan the development of copper-porphyry, alunite and polymetallic fields. The issues of increasing the resource base of liquid and strategic metals, formation of infrastructure, complexity of the use of mineral wealth and rational use of mineral resources remain problematic. A positive solution to problems is possible when developing and implementing an industry strategy. The basis for its formation is the geological and economic assessment of particular territories of the region.

scholarly journals Russian Gold Mining Output in 1901-1917: A Source Studies Aspect

2018 ◽  
pp. 679-691
Author(s):  
Pavel S. Grebenyuk ◽  
Keyword(s):  
Gold Mining ◽  
Mining Industry ◽  
The State ◽  
Pure Gold ◽  
State Institute ◽  
Gold Production ◽  
Archival Documents ◽  
Source Studies ◽  
The Russian Empire ◽  
Gold Industry

This paper explores the problem of gold mining output in the Russian empire in 1901-1917 drawing on published and archival data. The aim of the study is to clarify indicators of gold mining production, since in the leading studies the data vary due to the peculiarities of metal accounting. It draws on published materials and archival documents of the State Institute for Design of Enterprises of Gold and Platinum Industry of the Glavzoloto of the People's Commissariat of Nonferrous Metallurgy (Giprozoloto), prepared in 1944 as a ‘Collection of Materials on the Gold Industry: 1493 - 1943’ and stored in the State Archive of the Magadan Region. Materials of the Giprozoloto Institute contain calculations of gold production in Russia and the USSR from 1745 to 1943, as well as technical and economic information on national gold mining industry in the early 20th century. The analysis shows that gold mining indices in scientific literature and sources are given according to data from gold log-books or gold-smelting laboratories. Gold log-books did not reflect the volume of actual mining, they only showed the gold registered in mines; moreover, some gold was withheld, and then came in to laboratories for alloy. Accounting for metal in the gold-smelting laboratories showed higher and more accurate production figures, since it included artisanal mining gold. However, as the source study demonstrates, figures of gold production in 1901-1917 according to the Giprozoloto Institute (805.4 tons) and according to L.B. Kafengauz (814.6 tons) based on data of gold-smelting laboratories and incorporated volumes of uncleaned bullion gold entered in there. The results of the study change the views on the volume of gold mining in Russia in this period that prevail in the historiography. It should be noted, that according to calculations, confirmed indicators of industrial production of chemically pure gold in Russia in 1901-1917 amounted to 682.5 tons. Final figures of gold industry of the period in amount of chemically pure gold obtained in gold-smelting laboratories corresponded to indices of value of gold production used in the analysis industry dynamics, and is considered correct, when compared with the USSR gold-mining indices.

scholarly journals Pemisahan Logam Tanah Jarang dari Limbah (Tailing) Emas Poboya dengan Metode Pengendapan

KOVALEN ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 9-17
Author(s):  
Arianto ◽  
Husain Sosidi ◽  
Prismawiryanti ◽  
Dwi Juli Pusptasari
Keyword(s):  
Rare Earth ◽  
Gold Mining ◽  
Rare Earth Metals ◽  
Ammonium Hydroxide ◽  
Oxide Content ◽  
Mining Activities ◽  
Destruction Process ◽  
X Ray ◽  
Technological Developments ◽  
Gold Tailings

Gold tailings are waste generated from gold mining activities and contain minerals and rare-earth metals (REM) that are much needed in current technological developments. This research was conducted to determine the REM content contained in Poboya gold tailings, through the destruction process using sulfuric acid and precipitation using ammonium hydroxide. The results were showed that the level of REM contained in Poboya gold tailings was 6-7%. REM oxide content analysis performed with Scanning Electron Microscopy - Energy Dispersive X-Ray Spectroscopy (SEM-EDS) obtained 6 types of REM with the main REM levels namely Terbium (Tb): 77-80% dan Lanthanum (La): 13%, as well as other rare-earth metals with smaller amounts of Europium (Eu): 4-5%, Cerium (Ce): 2%, Neodymium (Nd): 0.02% and Gadolinium (Gd): 0.02%. Poboya gold waste can be used by the community as a source of REM  and used in various industries. Keywords: Gold tailings, rare earth metals (REM), destruction, precipitation

scholarly journals Investment Policy of the State Bank of Russia as a Factor of Monopolization of the Siberian Gold Industry

2018 ◽  
Vol 19 (3) ◽  
pp. 406-432
Author(s):  
Vadim Shakherov
Keyword(s):  
Gold Mining ◽  
New Technologies ◽  
Mining Industry ◽  
The State ◽  
Economic Life ◽  
Bank Loans ◽  
Investment Policy ◽  
Large Bank ◽  
Large Joint ◽  
Gold Industry

The article studies the issues of development of gold mining in the Leno-Vitimsky district in the late 19th - early 20th centuries. Monopolization of the fisheries has led to the emergence of large joint stock companies. Bank investments played a crucial role in expanding gold production and developing mining infrastructure. Lending to large gold industry contributed to the growth of the influence of the Irkutsk branch of the state Bank of Russia, increased its role in the economic life of the region. Large Bank investments led to the expansion of gold-bearing areas and contributed to the introduction of new technologies and technical devices in the mines. The article traces specific examples of the investment policy of the state Bank of Russia and the role of its regional branches in Irkutsk and Bodaybo. The constant increase in the cost of developing new mines, supply, hiring workers and purchasing equipment increased competition and helped monopolize the industry. As a result, large Bank loans played a more significant role. The state Bank of Russia not only saved «Lensky Gold Industrial Partnership» from financial collapse, but also contributed to its transformation into the largest gold mining enterprise in Russia with its favorable investment policy. By controlling the activities of «Lenzoto», the state, through Bank investments, not only received significant profits, but also strengthened its influence in the gold mining industry as an important area of the Russian financial system.

Sandwich complexes of naphthalocyanine with the rare earth metals

2003 ◽  
Vol 07 (07) ◽  
pp. 459-473 ◽  
Author(s):  
Jianzhuang Jiang ◽  
Wei Liu ◽  
Dennis P. Arnold
Keyword(s):  
Rare Earth ◽  
Recent Progress ◽  
Rare Earth Metals ◽  
Electron System ◽  
Current Status ◽  
Important Class ◽  
Sandwich Complexes ◽  
The Past ◽  
Significant Research ◽  
Sandwich Type

Over the past two decades and in particular the past five years, numerous sandwich-type rare earth complexes containing naphthalocyanine ligands have been synthesized. The more extended delocalized π-electron system of naphthalocyanine in comparison with phthalocyanine generates unique physical, spectroscopic, electrochemical and photoelectrochemical properties which have aroused significant research interest in these compounds. This review summarizes recent progress in research on this important class of molecular materials and overviews the current status of the field.

Perceived Burden of Informal Caregivers of a Chronically Ill Older Family Member

GeroPsych ◽  
2011 ◽  
Vol 24 (3) ◽  
pp. 143-154 ◽  
Author(s):  
Elmar Gräßel ◽  
Raffaela Adabbo
Keyword(s):  
Family Member ◽  
Informal Caregiver ◽  
Chronically Ill ◽  
Stress Model ◽  
The Past ◽  
Perceived Burden ◽  
Hypothetical Construct ◽  
Care Situation ◽  
The Impact ◽  
Further Development

The burden of caregivers has been intensively researched for the past 30 years and has resulted in a multitude of individual findings. This review illustrates the significance of the hypothetical construct of perceived burden for the further development and design of the homecare situation. Following explanations regarding the term informal caregiver, we derive the construct burden from its conceptual association with the transactional stress model of Lazarus and Folkman. Once the extent and characteristics of burden have been set forth, we then present the impact of perceived burden as the care situation. The question of predictors of burden will lead into the last section from which implications can be derived for homecare and relief of caregivers.

Magnetic susceptibility of liquid heavy rare earth metals

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-260-C5-261 ◽  
Author(s):  
M. Müller ◽  
E. Huber ◽  
H.-J. Güntherodt
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Rare Earth Metals ◽  
Heavy Rare Earth

ELECTRONIC RELAXATION IN RARE EARTH METALS AND ALLOYS - A NON-KRAMERS EXAMPLE : Tm3+

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-25-C1-31 ◽  
Author(s):  
N. S. Dixon ◽  
L. S. Fritz ◽  
Y. Mahmud ◽  
B. B. Triplett ◽  
S. S. Hanna ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Metals And Alloys ◽  
Electronic Relaxation
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