scholarly journals Uranium deposits of Mongolia, their exploration and mine development

2019 ◽  
pp. 50-57
Author(s):  
Dorjyunden Altankhuyag ◽  
Baldorj Baatartsogt ◽  
Batbold Munkhtur
Keyword(s):  
Hydraulic Control ◽  
Uranium Deposits ◽  
Tectonic Structures ◽  
Uranium Recovery ◽  
Energy Agency ◽  
Pilot Testing ◽  
Late Mesozoic ◽  
Well Production ◽  
The Government ◽  
Mine Development

Most of the known uranium deposits in Mongolia are related to volcano-tectonic structures of the Late Mesozoic and permeable sandstone aquifers of terrigenous sedimentary rocks in Late Mesozoic-Cenozoic basins. A young uranium deposit has been recently discovered at the surface in Quaternary alluvial sediments. Uranium deposits are classified here according to the International Atomic Energy Agency (IAEA) classification scheme. Beside of supergene and hydrothermal uranium discoveries, uranium mineralization can also be found in the Lower Cretaceous lignite seams, in Mesozoic alkaline intrusive rock related REE, Th, U enriched mineral systems and in metasomatic rocks, as well as in migmatites and pegmatites localized in Precambrian metamorphic rocks. Currently, no uranium can be produced in Mongolian facilities except pilot testing being done first. A pilot test was carried out at the Khairhan and Kharaat deposits in Mongolia and these experiments have demonstrated the ore to be amenable to acid leach (sulphuric acid) with the addition of an oxidizing agent. These tests confirmed that hydraulic control can be maintained and that the uranium solubilization and mobilization can be controlled. The results of the test were encouraging, with the well production rate, uranium concentration in produced solutions, chemical usage, and estimated uranium recovery all within ranges expected for normal commercial operations. There are a number of Mongolian uranium deposits are in the stage of mine development. The Government of Mongolia has approved the agreement of mine development of the Zuuvch ovoo and Dulaan uul deposits. Pilot testing on these deposits is underway and uranium will be extracted by in-situ leaching soon.

scholarly journals Pemuliaan Mutasi untuk Perbaikan terhadap Umur dan Produktivitas pada Kedelai

2016 ◽  
Vol 9 (3) ◽  
pp. 135 ◽  
Author(s):  
Asadi Asadi
Keyword(s):  
Cropping System ◽  
Mutation Breeding ◽  
Energy Agency ◽  
High Productivity ◽  
Drought Tolerant ◽  
Early Maturing ◽  
Seed Irradiation ◽  
New Varieties ◽  
The Government ◽  
Mutant Lines

<p>To support the government policy in<br />improving soybean production, it is suggested to plant early<br />maturing (&lt;80 days), drought tolerant and high yielding<br />varieties to be applied in the cropping system of rice-ricesoybean<br />and rice-rice-rice-soybean in lowland, and in<br />dryland cropping system of rice-soybean or rice-other<br />palawija crops. Mutation breeding in soybean for early<br />maturity and high productivity in soybean can be applied to<br />obtain some new varieties. The breeding procedures<br />included selection using bulk method for M1 population,<br />followed by the pedigree method for M2-M5 generations.<br />Evaluation of uniformity (homozygous) of lines is done on<br />the M4 generation. Yield and adaption testing are conducted<br />during M5-M8 generations. Through mutation breeding early<br />maturity soybean varieties were released elsewhere. In<br />national research institutes such as The National Nuclear<br />Energy Agency (Batan) Indonesia, soybean mutation breeding<br />activities were begun since 1972, while in Indonesian<br />Center for Agricultural Biotechnology and Genetic<br />Resources Research and Development (ICABIOGRAD), it<br />was started in 2009. Batan has released two early maturing<br />soybean varieties through seed irradiation such as Tengger<br />in 1991 and Meratus in 1998. While in 2011 ICABIOGRAD<br />through irradiation of calli-derived embryo zygotic has<br />selected 50 early maturing and potentially yielding soybean<br />mutant lines. While through seed irradiation in 2012, 15<br />soybean advanced lines that matured earlier and<br />demontrated higher yield were also obtained.</p>

Mining takes on renewed importance in Ecuador

2015 ◽  
Keyword(s):  
Foreign Investment ◽  
Economic Activity ◽  
Large Scale ◽  
Mining Sector ◽  
Content Type ◽  
Public Revenue ◽  
The Government ◽  
Laws And Policies ◽  
Mine Development ◽  
Increased Activity

Subject The mining outlook in Ecuador. Significance The collapse of world oil prices has forced the government of President Rafael Correa to search for new sources of public revenue and foreign investment. The mining sector, which remains underdeveloped, has the potential to make significant contributions on both of these fronts. Reflecting the growing importance of the sector, the government has a created a Mining Ministry and appointed a mining minister. While numerous challenges continue to face the industry, it has shown signs of increased activity in the opening six months of the year. Impacts Opponents of mining development will attempt to impede medium and large-scale projects, through the courts and on the streets. Changes to water laws and policies will face opposition due to fears they may facilitate mine development and threaten water supplies. While investment in the mining sector will boost economic activity, the economy will expand more slowly than expected in 2015.

scholarly journals Australian action to reduce health risks from radon

2020 ◽  
Vol 49 (1_suppl) ◽  
pp. 77-83
Author(s):  
S.A. Long ◽  
R.A. Tinker
Keyword(s):  
Action Plan ◽  
National Level ◽  
Individual Risk ◽  
Energy Agency ◽  
Safety Standards ◽  
Public Exposure ◽  
High Concentrations ◽  
The Government ◽  
The Individual ◽  
Radon Concentrations

In Australia, worker exposure to radon in underground uranium mines has been a focus of policy makers and regulators, and has been well controlled in the industry sector. That cannot be said for public exposure to radon. Radon exposure studies in the late 1980s and early 1990s demonstrated that the levels of radon in Australian homes were some of the lowest in the world. The International Basic Safety Standards, published by the International Atomic Energy Agency, requires the government to establish and implement an action plan for controlling public exposure due to radon indoors. When considering different policy options, it is important to develop radon prevention and mitigation programmes reflecting elements that are unique to the region or country. The Australian Radon Action Plan is being considered at a national level, and presents a long-range strategy designed to reduce radon-induced lung cancer in Australia, as well as the individual risk for people living with high concentrations of radon. In Australia, workers who are not currently designated as occupationally exposed are also considered as members of the public. In the Australian context, there are only a limited set of scenarios that might give rise to sufficiently high radon concentrations that warrant mitigation. These include highly energy efficient buildings in areas of high radon potential, underground workplaces, workplaces with elevated radon concentrations (e.g. spas using natural spring waters), and enclosed workspaces with limited ventilation. The key elements for a successful plan will rely on collaboration between government sectors and other health promotion programmes, cooperative efforts involving technical and communication experts, and partnering with building professionals and other stakeholders involved in the implementation of radon prevention and mitigation.

Modeling of filtration processes of technological solutions in block underground leaching

2021 ◽  
Vol 27 (4) ◽  
pp. 13-19
Author(s):  
А. Zozulya ◽  
◽  
V. Ovseychuk ◽  
Keyword(s):  
Uranium Deposits ◽  
Underground Leaching ◽  
Uranium Recovery ◽  
Leaching Process ◽  
Applied Technology ◽  
The Rich ◽  
Leaching Parameters ◽  
Chemical Association ◽  
Productive Solution ◽  
Underground Chamber

PAO “Priargunsky Production Mining and Chemical Association” has been working on reserves of uranium deposits of the Streltsovsky ore field for more than 50 years. During this period, most of the rich ores have been worked out by traditional mining and physical technology. The share of poor and ordinary ores remains significant, but traditional technology does not provide the necessary level of profitability. Therefore, the widespread introduction of physicochemical technology: underground block (BPV) and heap leaching (KV) can be a decisive moment in the continuation of the operation of these deposits. The applied technology of underground block leaching has one significant drawback – a low rate of uranium recovery into a productive solution, which significantly reduces the effectiveness of this technology in the development of poor uranium deposits. To increase the yield of uranium into the productive solution, it is necessary to analyze the entire preparation and leaching process and establish the main reasons for the low rates of transition of uranium to a mobile state. For this purpose, it is proposed to simulate the underground leaching process by building visual models of halos spreading of solutions along shrinked ore mining mass accumulated in an underground chamber. During the simulation, it was found that the distribution of the size classes of the broken ore pieces in the chamber can be predicted at the stage of drilling and blasting operations, and when determining the line of least resistance W and the distance between the ends of the wells, take into account the diameter of the controlled crushing zone R_p. At the same time, 3 zones of granulometric compositions are formed: a re-grinding zone, an optimum zone and a non-carbarite exit zone. The flow of solutions through these zones will differ the more significantly, the higher the height of the chamber. In a zone with larger crushing, an almost steep distribution of the solution spreading front is expected. Accordingly, the smaller the fraction, the lower the front to the horizontal is. The following functions are offered to simulate filtering processes: – it is possible to control the flow of working solutions to the fan of irrigation wells in order to achieve optimal leaching parameters, i.e. to quickly control the process; – knowledge of the law of distribution of irrigation flares makes it possible to select the optimal grid of location of single sprinklers

scholarly journals THE ANALYSIS OF ACCOUNTING TREATMENTS BASED ON GOVERNMENT ACCOUNTING STANDARDS (GAS) ON INTANGIBLE ASSETS (IA) IN NATIONAL NUCLEAR DEVELOPMENT AGENCY

2018 ◽  
Vol 1 (2) ◽  
pp. 180
Author(s):  
Budi Kaliwanto ◽  
Sri Agustini
Keyword(s):  
Government Regulation ◽  
Intangible Assets ◽  
Accounting Standards ◽  
Energy Agency ◽  
Accounting Standard ◽  
Government Accounting ◽  
Use Of Resources ◽  
State Administration ◽  
Nuclear Development ◽  
The Government

Government Regulation Number 71 of 2010 dated October 22, 2010 onGovernment Accounting Standard (GAS) states that the Government applies Accrual Based GAS and is declared in Statement of Government Accounting Standards (SGAS). While the technical accounting explanation used as a guide is published in the form of GAS Technical Bulletin. In the case of Intangible Assets (IA), the Government Accounting Standards Committee (GASC) issued Bulletin No. 17 on Accounting for Intangible Assets based on Accruals. The implementation of the Technical Bulletin was used as the basis for the preparation of the IA Report in the National Nuclear Energy Agency (BATAN). Management and Preparation of BATAN's Financial and State Property (BFSP) reports using management flows, consistency of established amortization methods, impairment, discontinuation and disposal of IA. In the preparation of the IA Report, BATAN as a government institution is increasingly required to adapt to changes in government management systems that demand accountabilityprinciples, in which every state administration must be accountable for theperformance or outcomes of all programs and activities to the community for the use of resources and authority given. The result of testing of research instrument showed that IA data processing in BATAN based on the grouping of 5 categories (Copyright, Patent, Software, Result of Research / Research, and other Intangible Assets) outlined the value of the Copyright asset has the smallest value and the other IA has the greatest value (can be seen on the results of the discussion on pages 9-15).

scholarly journals Geological, Geochemical, and Radiometric Study of Sandstone-Type Uranium Deposit Exploration in Menukung Area, West Borneo

2021 ◽  
Vol 1 (1) ◽  
pp. 1-12
Author(s):  
Wira Cakrabuana ◽  
◽  
Ekky Novia Stasia Argianto ◽  
Roni Cahya Ciputra ◽  
Dhatu Kamajati
Keyword(s):  
Uranium Deposit ◽  
Cost Effective ◽  
Uranium Content ◽  
Uranium Mineralization ◽  
Geological Mapping ◽  
Uranium Deposits ◽  
Coal Seams ◽  
Energy Agency ◽  
Uranium Exploration ◽  
Radiometric Data

BATAN has been carried out uranium exploration in West Borneo since 1969. So far, the exploration is focused on metamorphite-type uranium deposits in Kalan Area. The previous study concluded that mineralized uranium is originated from Sepauk Tonalite consisted of felsic-intermediate igneous rocks, and is hosted in medium-grade foliated and non-foliated metamorphic rocks of Pinoh Metamorphite. As uranium exploration develops, the International Atomic Energy Agency (IAEA) introduces the sandstone-type uranium mineralization concept that offers a more cost-effective mining process. The Melawi Basin becomes an attractive probable location for sandstone-type uranium deposit exploration since it is situated downstream of Schwaner Mountain's Sepauk Tonalite. The sandstone-dominated Tebidah Formation of Melawi Basin can be the host rock for sandstone-type uranium deposit if there is a reduction zone to trap the mobile uranium in the groundwater. The geological mapping, geochemical sampling, and radiometric survey were conducted in Menukung Area to prove the hypothesis. It is located in the eastern part of the Tebidah Formation, which contains abundant carbonaceous mudstones associated with coal seams. Mobile uranium content analysis showed the anomaly of 36–60 ppm at the central of Tebidah Formation at the study area, while radiometric data denoted the anomaly of 6.5–11.3 ppm eU. At those locations, coal and carbonaceous sandstone were observed. Those data indicate the presence of a reductive environment that gives the advantage to uranium trapping. It can be concluded that there is a possibility of the occurrence of sandstone-type uranium mineralization in the Menukung Area.

scholarly journals Tectonics of the Central Part of the Adycha-Taryn Fault Zone (Verkhoyansk-Kolyma Orogenic Belt, NE Asia)

2021 ◽  
Vol 906 (1) ◽  
pp. 012109
Author(s):  
D.A. Vasiliev ◽  
A.V. Prokopiev ◽  
N.N. Ermakov
Keyword(s):  
Fault Zone ◽  
First Generation ◽  
Regional Scale ◽  
Strike Slip ◽  
Orogenic Belt ◽  
Tectonic Structures ◽  
Late Mesozoic ◽  
Deformation Stage ◽  
Fold And Thrust Belt ◽  
Dextral Strike Slip

Abstract The study area is located in the central part of the regional-scale Adycha-Taryn fault zone separating the Adycha-El’gi and Nera anticlinoria in the hinterland of the Verkhoyansk fold-and-thrust belt (central part of the Verkhoyansk-Kolyma orogenic belt). Detailed structural studies were conducted in large quarries in the lower reaches of the El’gi River (Indigirka R. basin). In the Adycha-El’gi anticlinorium, several generations of folds, faults, and cleavage are recorded. The intensity of deformation here is found to gradually increase in NE direction. The NE wall of the Adycha-Taryn fault is thought to be more strongly deformed. The results of our investigations revealed three structural parageneses. The first paragenesis includes thrusts, reverse faults, and intense NW-striking folds of the first generation. The second paragenesis consists of less intense superposed folds of the second generation, with subvertical axes, as well as sinistral strike-slip faults. The previously made assumption is confirmed about manifestation in the study area of at least two deformation stages. We also presuppose the existence of the third deformation stage in which dextral strike-slip faults were formed. A change in the intensity of tectonic deformations both along and across the Adycha-Taryn fault zone is first established. On the southwestern side of the fault zone, the intensity of deformation structures decreases from NW to SE. On the northeastern side, the deformation intensity first increases in that same direction but then tends to diminish. An assumption is made about a growing importance of reverse faults in NW direction, along the Adycha-Taryn fault zone. Orientation of paleostress axes responsible for the formation of tectonic structures in the study area is first determined. Folds and thrusts of the first deformation stage were formed under subhorizontal compression in NE direction. Sinistral strike slips and associated folds of the second deformation stage resulted from WE-oriented subhorizontal compression. The following dextral strike-slip motions occurred in the conditions of NW-directed subhorizontal compression and NE-oriented subhorizontal extension. The studied tectonic deformations were formed in Late Mesozoic time as a result of collision-accretion events in the central part of the Verkhoyansk-Kolyma orogenic belt.

Phosphates of the Streltsovsky ore field of South-Eastern Transbaikalia (Part I)

2021 ◽  
Vol 27 (2) ◽  
pp. 15-27
Author(s):  
Yu. Pavlenko ◽  
Keyword(s):  
High Reliability ◽  
Geological Structure ◽  
Raw Material ◽  
Adjacent Area ◽  
Tectonic Block ◽  
Uranium Deposits ◽  
Late Mesozoic ◽  
South Eastern ◽  
Eastern Transbaikalia ◽  
Phosphate Mineralization

The conclusions’ reliability of the geologists who created the largest uranium ore base in the country on the territory of the Streltsovsky ore field (SRP) in South-Eastern Transbaikalia, about the belonging of spatially isolated phosphate mineralization and powerful industrial mineralization to a single final stage of Late Mesozoic tectonomagmatitic activation, is clarified. The relevance of the research lies in the need to study the geological materials on the SRP and the adjacent area to assess the prospects for involving in the exploitation of phosphate mineralization developed on the flanks of uranium deposits developed under the state program of the TOP. The object of study is the “blind” Argunskoye and Zherlovoye deposits and their western flanks on the surface, and the subject is the phosphate mineralization developed in the block of terrigenous-carbonate rocks. The purpose of the research is to clarify the time and features of the formation of phosphates, and the task is to assess the industrial significance of phosphate mineralization to make a decision on the feasibility of additional study of this scarce raw material. The methodology of scientific research is based on the interpretation of geological facts given in the literature and stock materials, use of concepts, terms, creation of hypotheses and their consequences, consistency of the comparison of which with the established facts determines the relatively high reliability of geological results. We used a descriptive method that takes into account a system of interrelated consistent positions, and a method of theoretical modeling, which raises the strategic goals of nature cognition to a higher scientific level. The results of the research are presented in three articles (parts). The first part contains information about the structural and geological positions of the region, the ore field, and the geological structure of the Western tectonic block of the SRP and the Argun, as well as the Vent uranium deposits. It is established that phosphate mineralization is the product of metamorphic transformations of Riphean phosphorites and igneous apatites associated with the Middle Riphean moderately alkaline peridotite-gabbro-gabbrodiorite complex. Phosphate mineralization is older than the Late Mesozoic uranium and other types of industrial mineralization by at least 1 billion years

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