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1

Ibodov, Jasurbek Azamat o'g'li. "OPENING AND PREPARATION OF ORE DEPOSITS." CURRENT APPROACHES AND NEW RESEARCH IN MODERN SCIENCES 1, no. 4 (2022): 21–24. https://doi.org/10.5281/zenodo.7196907.

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Opening a mineral deposit is the execution of capital mining operations that open access to all or part of the mine from the surface and provide the opportunity to carry out preparatory work necessary for servicing the mine surfaces. The main goals of mineral extraction are to create transport links between parking areas (the place where minerals are extracted) and the point of receiving it on the surface, and to create conditions for the safe movement of people in mines and to provide workplaces with clean air. This article provides information on opening ore deposits and its preparation.
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2

Firmansyah, Salma Arjuan Yumna. "PROSEDUR PEMBUKAAN REKENING DEPOSITO PADA BANK BAPAS PUSAT 69." TRANSEKONOMIKA: AKUNTANSI, BISNIS DAN KEUANGAN 3, no. 1 (2023): 174–83. http://dx.doi.org/10.55047/transekonomika.v3i1.364.

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This study aims to determine the technique of opening and disbursing closing deposit accounts at BPR BAPAS 69 Magelang Head Office. The method in this study is Descriptive Analysis by defining, illustrating, or summarizing data points so that patterns that meet all data conditions can emerge. The results of this study are that the customer must come to the BAPAS 69 BPR office bringing the requirements (KTP/SIM/PASPOR/KITAS and NPWP), visit the Customer Service counter, submit the required files, and fill out a form for opening a BPR BAPAS 69 deposit account at the Head Office Magelang. As for deposits, filling out deposit slips, deposits at teller counters, and collecting deposits at Customer Service counters are examples of deposit procedures. Complete the KTP/SIM/PASPOR/KITAS and NPWP withdrawal requirements, bring a photocopy of one of the requirements and a stamp along with the deposit slip to the Customer Service counter, fill out the deposit withdrawal form, pay a fine if it is not due, and go to the teller counter to withdraw money at the time BPR BAPAS 69 deposit account disbursement procedure, Magelang Head Office.
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Ermakov, A. Yu, V. V. Senkus, Duc Thang Pham, Val V. Sencus, N. I. Abramkin, and E. A. Ermakov. "Combined Mining Technologies for Coal Deposits (Review)." Mining Science and Technology 4, no. 4 (2020): 230–50. http://dx.doi.org/10.17073/2500-0632-2019-4-230-250.

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The paper discusses the main disadvantages of strip and underground mining methods and possibilities of eliminating the disadvantages through introducing a combined technology of coal deposit mining. Combined coal mining technology is the method comprising elements of several geotechnologies, for example, underground and strip mining, as well as, possibly, underwater mining, borehole and other techniques of deposit mining. The combined coal mining technology provides for unified layout for opening, development, production and processing of reserves for the whole LoM on the basis of general technological solutions made in advance. Such complex solutions for opening and development of deposit reserves within the opencast and underground mining contour allows minimizing the volume of openings and reducing the time for commissioning, investment costs, as well as decreasing the costs for aerage, drainage, rock mass hauling and land reclamation. Substantiation of deposit opening options should comprehensively take into account technical, organizational, and economic factors [34–37]. Analysis of the options as exemplified by the Makar’evskoe coal deposit development in Kuzbass allows to conclude that the combined method is promising and promotes increasing optimal volumes of coal production, while reducing the deposit development time by about 15 %, and increase the net present value compared to underground and opencast mining options more than 5 times.
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4

Williams, K. J., S. J. Tait, and R. M. Ashley. "In-sewer sedimentation associated with active flow control." Water Science and Technology 60, no. 1 (2009): 55–63. http://dx.doi.org/10.2166/wst.2009.286.

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Active flow control using automated gates and weirs aims to utilise available dispersed storage within sewer systems to alleviate the severity and frequency of localised flooding incidents. Whilst a previous study has demonstrated its potential, a key operational concern before implementation was sedimentation. An experimental programme was designed to investigate the sediment deposition created when using a flow control device. Tests were also undertaken to examine the potential for rapid gate opening to flush away any resulting deposits. In catchments dominated by fine material in suspension, the use of an active flow control device can result in a uniformly thick deposit upstream of the gate. Rapid gate opening results in deposited material eroding in large sections starting at the gate and moving in an upstream direction. Granular sediment forms a series of discrete bedforms which are fairly uniform regardless of the flow conditions and a larger deposit further upstream. The potential for flushing granular deposits is limited and modification of the operation of the gate has shown little potential for increasing the effectiveness. Therefore, active flow control using a single downstream gate may only be suitable in systems with fine material moving in suspension during dry weather flow and not where there is significant granular sediment.
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5

Riswandari, Ira Mei, Suwarso Suwarso, and Nursyamsida Tohari. "Akuntansi Pencatatan Pembukaan dan Pencairan Deposito Berjangka pada PT. BPR Anugerahdharma Yuwana Cabang Ambulu Kabupaten Jember." ACCOUNT (Journal of Accounting and Finance) 1, no. 2 (2023): 63–73. http://dx.doi.org/10.31537/account.v1i2.1546.

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The purpose of this research is to determine the recording of opening and disbursement of time deposits at PT. BPR Anugerahdharma Yuwana Ambulu Branch, Jember Regency and compare it with theory. The research method used is descriptive qualitative with data collection techniques of interviews, observation, and documentation. The results of this study are the recording of the opening and disbursement of time deposits at PT. BPR Anugerahdharma Yuwana Ambulu Branch, Jember Regency uses the Cash Basis system, and the recording is also in accordance with the theory, except that there is a slight difference in the recording of account names and deposit interest taxes are not included in the interest payment journal in accordance with company policy.
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6

Jalaludin, Jalaludin. "The Review of Opening Procedures of Sharia Based Saving in Sharia Financial Services Cooperation BMT Mitra Sadaya Branch of Purwakarta." Journal of Economicate Studies 1, no. 2 (2018): 109–18. http://dx.doi.org/10.32506/joes.v1i2.180.

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This article describes the variation of syariah savings in the institution of the temple al-Maal wa al-Tamwil (BMT) Mitra sadaya. The approach used in this study is a qualitative approach and the type of data used in this study is descriptive. The object of this research is the analysis of the opening procedure of sharia savings at the institution of bait al-Maal wa al-Tamwil (BMT) Mitra Sadaya Purwakarta branch. The subject of the research is the source of data asked for the information according to the research problem. This study aims to determine the form of procedures, implementation procedures, the benefits of procedures and factors in running procedures in the opening of syariah savings. The results of this study are: Variations of Islamic savings at the institution of the temple al-Maal wa al-Tamwil (BMT) Mitra sadaya there are three contracts used: (1) principle akad wadi'ah, (2) Mudharabah contract principle, (3) Qard. Then for the opening procedure of syariah savings as follows: (1) Prospective customers / members come to the office or hold an appointment with marketing bait al-Maal wa al-Tamwil (BMT); (2) The prospective customer / member meets with the Customer Service section bait al-Maal wa al-Tamwil (BMT) Mitra sadaya; (3) Prospective customers / members fill out the application form of syariah account opening or savings account; (4) Prospective client / member shall sign the approval for opening of syariah saving account; (5) Entered and checked by the teller section; (6) Print sharia savings book in accordance with customer / member application; (7) The signing of officials related to the institution of al-Maal wa al-Tamwil (BMT) Mitra sadaya; (8) Calculate and give the first deposit money to the teller; (9) Input of initial deposit and deposit of deposit; (10) Re-check the nominal deposit with the amount of balance and stamp teller; (11) Account opening is completed and customers / members are welcome to go home. Shariah-compliant profit sharing of bait al-Maal wa al-Tamwil (BMT) Partners sadaya partner, if the form of ordinary sharia savings (other than deposits) gifts or profits are given equivalent to 35% of office income. However, if included in the category of gift deposits granted equivalent to 9% -13% per year. As well as deposits that fall into the category of capital of the institution of bait al-Maal wa al-Tamwil (BMT). Sadaya Partners that last from 4-5 years, the profits are equal to 30% -110%.
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7

Rogizny, Valery, Danila Kulikov, Maria Karpukhina, Alexey Cheremisin, and Vasily Khromov. "Investment appeal assessment of Pt-rich and Cu-Ni deposits of Monchegorsky ore district in current conditions." Ores and metals, no. 1 (May 21, 2021): 42–56. http://dx.doi.org/10.47765/0869-5997-2021-10003.

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Development potential and investment attractiveness of PGM deposits (Monchegorsky ore district) are discussed. By the late 2020, the reserves of these deposits were approved based on results of a feasibility study review assessment in the State Reserve Commission and TsNIGRI approval. In current mineral market conditions (including high Pd price), the most attractive development projects are Vuruchuaivench deposit comprising 4 areas (Plast 300, Vuruchuaivench, Yuzhnosopchinsky and Arvarench), NittisKumuzhya-Travyanaya occurrence and Loipishnyun area. In terms of reserves, ore grades and proximity to processing plants, these potential mining projects are less expensive if developed concurrently. The paper presents recommendations for PGM deposit opening, development and mining using advanced mining equipment in open-pit and underground mining operations, ore conveying and processing plant tailings disposal to infill underground workings. Economic estimates were made supporting development viability of the above deposits within Monchegorsky ore district.
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8

Zeitinova, Sh B., A. Zh Imashev, A. M. Suimbayaeva, R. H. Alzhanov, and D. R. Makhmudov. "Assessment of the stability of the underworked sides and ledges of the quarry to determine the area of possible location of the shaft." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 325, no. 2 (2022): 72–79. http://dx.doi.org/10.31643/2023/6445.20.

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As known, the main methods of developing solid minerals are open and underground methods. However, an analysis of the world’s practice of developing deposits of solid minerals also indicates the widespread use of the combined method of development in the last 50-60 years. Combined development of deposits at domestic and foreign mining enterprises is used due to the variable depth of deposits, which is typical mainly for deposits of steep and inclined fall. The essence of the combined development is that the upper horizons are developed in an open way, and the lower ones are developed underground. In such deposits, the following scheme has become widespread: the initial development of the upper section of the deposit by a shallow quarry (up to a depth of 80-100 m, sometimes more), then the construction of an underground mine, carried out in parallel with the completion of the quarry reserves. When opening sub-quarry reserves subject to underground mining, the resulting quarry space can be used. The penetration of vertical and inclined opening workings, tunnels, and exits from the berm sides or directly from the bottom of the quarry has become widespread. In parallel mining of reserves by open and underground methods, the joint use of transport workings is widely used for the delivery of ore mass from the quarry and underground mine, the placement of an underground crushing complex, auxiliary, and repair facilities in the quarry itself. In addition, the method of refining sub-quarry reserves with the opening of the underground part outside the quarry space has been widely used. After the end of open-pit mining, underground horizons are opened by capital mining workings (vertical, inclined shafts, tunnels).
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9

Courtney-Davies, Liam, Cristiana L. Ciobanu, Simon R. Tapster, et al. "OPENING THE MAGMATIC-HYDROTHERMAL WINDOW: HIGH-PRECISION U-Pb GEOCHRONOLOGY OF THE MESOPROTEROZOIC OLYMPIC DAM Cu-U-Au-Ag DEPOSIT, SOUTH AUSTRALIA." Economic Geology 115, no. 8 (2020): 1855–70. http://dx.doi.org/10.5382/econgeo.4772.

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Abstract Establishing timescales for iron oxide copper-gold (IOCG) deposit formation and the temporal relationships between ores and the magmatic rocks from which hydrothermal, metal-rich fluids are sourced is often dependent on low-precision data, particularly for deposits that formed during the Proterozoic. Unlike accessory minerals routinely used to track hydrothermal mineralization, iron oxides are dominant components of IOCG systems and are therefore pivotal to understanding deposit evolution. The presence of ubiquitous, magmatic-hydrothermal U-(Pb)-W-Sn-Mo–bearing zoned hematite resolves a range of geochronological issues concerning formation of the ~1.6 Ga Olympic Dam IOCG deposit, South Australia, at up to ~0.05% precision (207Pb/206Pb weighted mean; 2σ) using isotope dilution-thermal ionization mass spectrometry (ID-TIMS). Coupled with chemical abrasion-ID-TIMS zircon dates from host granite and volcanic rocks within and enclosing the ore-body, a confident magmatic-hydrothermal chronology is defined. The youngest zircon date from the granite intrusion hosting Olympic Dam indicates magmatism was occurring up until 1593.28 ± 0.26 Ma. The orebody was principally formed during a major mineralizing event following granite uplift and during cupola collapse, whereby the hematite with the oldest age is recorded in the outer shell of the deposit at 1591.27 ± 0.89 Ma, ~2 m.y. later than the youngest documented magmatic zircon. Hematite dates captured throughout major lithologies, different ore zones, and the ~2-km vertical extent of the deposit support ~2 m.y. of hydrothermal activity. New age constraints on the spatial-temporal evolution of the formation of Olympic Dam are considered with respect to a mantle to crustal continuum model. Cyclical tapping of magma reservoirs to maintain crystal mushes for extended time periods and incremental building of batholiths on the million-year scale prior to main mineralization pulses can explain the ~2-m.y. temporal window temporal window inferred from the data. Despite the challenge of reconciling such an extended window with contemporary models for porphyry deposits (≤1 m.y.), formation of Proterozoic ore deposits has been addressed at high-precision and supports the case that giant IOCG deposits may form over millions of years.
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10

LUKOMSKYI, Vladyslav, and Mariia KURYLO. "GEOLOGICAL AND MINING CONDITIONS FOR THE EFFECTIVE DEVELOPMENT OF CONSTRUCTION AND CRUSHED STONE DEPOSITS WITHIN THE DISTRIBUTION OF GLACIAL SEDIMENTS." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3 (106) (2024): 57–61. http://dx.doi.org/10.17721/1728-2713.106.07.

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The study determined the feasibility of multucommodity deposits development of construction and crushed stone, which are localized within the distribution of glacial and fluvioglacial deposits. Overburden is studied as associated minerals, used in the construction industry and landscape design. The objects of the study are deposits of granites and labradorite, which have industrial reserves and are mined, as overburden rocks have enough thickness of fluvioglacial sediments. During the development of crystalline rock, fluvioglacial deposits in many cases are classified as overburden. Traditional mining methods of gravel-sand rocks are usually unsuitable or complicate the development, since the problem of extracting overburden fluvioglacial deposits, as a rule, does not exist at the stage of opening, but already in the mining process. The mining-geological features of fluvioglacial and glacial deposits make it necessary to adjust design solutions when developing crushed stone deposits to ensure the stability of the sides of the quarry and industrial safety requirements. There are the results of studying the geological structure of deposits of building stone and crushed stone within the boundaries of glacial deposits. These are the Sosnivske, Yaroshivske, Koshchiivske, Boguslavske deposits, the "Deshki" area, and the Ostriv deposit, as well as in the "Synii Kamin" block raw material deposit, where overburden rocks are presented by thick glacial and fluvioglacial layers of the flgPIIdn Dnieper climatolite. The following features of the geological structure within these deposits were fixed: 1) a significant change of the physical and mechanical properties of the rocks that make up the fluvioglacial deposits and their granulometric composition; 2) a variety of mining conditions, including the presence of layers of sandy-clay rocks; 3) different degrees of waterlogging of fluvioglacial deposits; 4) a significant change in quality indicators within one deposit. The timeliness and quality of the detection of these features affects the effectiveness of the development of fluvioglacial rocks as co-occurring or by-product mineral. For such reserves, it is recommended to develop and use cut-off parameters for mineral raw materials, which take into account specific mining and geological conditions, during geological and economic assessment.
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11

Tadjiev, Shukhrat, and Erkinjon Sharopov. "Assessment and selection of a rational option for the opening of near-contour reserves during open-underground mining of upland deposits." E3S Web of Conferences 525 (2024): 02004. http://dx.doi.org/10.1051/e3sconf/202452502004.

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The article considers a combined method of mining the Karakutan deposit and substantiates two systems of opening the contiguous reserves by the open-underground method. The development of short-circuit reserves provides for the use of the worked-out space of the quarry for the opening of ore zones by horizontal, vertical or inclined workings with the combination of open and underground mining cargo flows into a single cargo flow. The transition to underground mining is expected at the last stage of completion of the open pit. Due to the fact that there are more reserves behind the contours of the quarry, deposits that it is advisable to work out in an open-underground way.
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12

Pysmennyi, S., S. Chukharev, K. Kyelgyenbai, V. Mutambo, and A. Matsui. "Iron ore underground mining under the internal overburden dump at the PJSC “Northern GZK”." IOP Conference Series: Earth and Environmental Science 1049, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1755-1315/1049/1/012008.

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Abstract Deterioration of mining conditions at mining deposits by open pit methods (increased mining depths, reduced ore deposit thickness) leads to an increase in mining costs. In Ukraine, to reduce open pit mining costs, overburden is disposed in temporary internal dumps located directly in the open pit over the ore reserves. Reactivation of pit areas with the temporary internal overburden dump located on them results in a surge of mining operations and deterioration of technical and economic indicators. Increased energy consumption, a decrease in working site parameters, an increase in angles of open pit slopes and stripping lags lead to unprofitability of open pit mining. One of the solutions to the mentioned scientific and engineering problem involves combined mining of deposits by integrated open pit and underground mining operations. The combined open pit-underground mining method enables reducing mining costs and enhancing technical and economic indicators. The suggested schemes for opening reserves located under the internal overburden dump enhance technical and economic indicators of deposit mining through making the internal dump a permanent one. This allows further disposal of overburden into internal dumps. Implementation of scientific recommendations and technological solutions resulted from the research performed (exemplified by the deposit Hannivske, Ukraine) reduces the cost of ore by 1.33 USD/t. At the same time, the total cost of building an underground mine makes 16.4 M USD, which is 30% less than when applying traditional opening vertical shaft schemes.
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13

Benedykt, Pepliński. "External Costs of Opencast Brown Coal Mining in Agriculture and Agri-Food Industry (on the Example of Wielkopolska)." Central European Economic Journal 5, no. 52 (2019): 154–71. http://dx.doi.org/10.1515/ceej-2018-0018.

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Abstract The aim of the work was to analyse the external costs for agriculture and agri-food industry related to the possible launch of lignite deposits in Wielkopolska, that is, on the Ościsłowo, Dęby Szlacheckie and Oczkowice deposits. The duration of the mine’s impact on the environment includes the period of drainage of the deposit, its exploitation and the time necessary for the reconstruction of water relations around the open pit. The level of losses in agricultural production was estimated based on the production results achieved by agriculture threatened by the occurrence of external costs based on the Central Statistical Office (CSO) data. The studies adopted two variants of the impact of open pitches on agriculture, including: the area of the estimated depression hopper, that is, the area in which the water table lowered by at least one meter and the entire impact area of the outcrop. In total, the external costs in agricultural production and processing, which may arise as a result of the launch of extraction from the three analysed deposits, were estimated at PLN 7.7–32.3 bn, losses in non-produced agricultural production at PLN 31.8–113.0 bn, while when the value of lignite is PLN 83.7–111.6 bn. Such high costs mean that the opening of new lignite deposits in Wielkopolska raises economic doubts. This also applies to each deposit separately.
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14

Muslim, A. "OPENING OF A PRODUCTIVE RESERVOIR DURING DRILLING." Scientific heritage, no. 106 (February 5, 2023): 62–63. https://doi.org/10.5281/zenodo.7607431.

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When opening a formation during drilling, it is important to prevent the penetration of drilling fluid into the formation. The quality of the formation opening, along with high-quality cementing of the production column, repair and insulation work, well development, completion are factors affecting oil recovery and oil recovery coefficient (ORC), allowing to obtain correct data on the oil and gas content of individual productive deposits, the effective thickness of the formation. Technologies for opening and testing promising subsurface areas should allow preserving the natural state of the reservoir in order to obtain reliable results of testing for industrial oil and gas inflow.
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15

PTASHNIK, YU P., A. I. PTASHNIK, and A. I. KOSOLAPOV. "TECHNOLOGICAL SOLUTIONS FOR THE EFFECTIVE INVOLVEMENT OF MINERAL RAW MATERIALS OF CARBONATE ROCK DEPOSITS." Mine Surveying and Subsurface Use, no. 3 (2024): 4–11. http://dx.doi.org/10.56195/20793332_2023_3_4_11.

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The article presents the results of studies of an effective technology for the development of elongated deposits of carbonate rocks, the novelty of which lies in the sequence of combined opening of the deposit, combined with the features of the separation of cargo flows of overburden rocks and minerals, as well as in the placement of primary processing facilities in the area of the worked-out space of the quarry and underground workings, together ensuring a reduction in the average coefficient of overburden and the earth capacity of open mining operations. It is proved that by varying the depth of the concentration horizon in the established technological corridor, depending on the deterministic group of the quarry, it is possible to achieve a reduction in the level of total operating costs up to 7.5%, which for large deposits amounts to tens of billions of rubles. The results of the research can be useful in substantiating the technology of the development of a deposit of carbonate rocks.
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Shishkov, R. I., V. A. Fedorin, and V. Ya Shakhmatov. "SURFACE-UNDERGROUND METHOD FOR OPENING AND PREPARING SHALLOW COAL DEPOSITS." Ugol', no. 10 (October 8, 2020): 13–16. http://dx.doi.org/10.18796/0041-5790-2020-10-13-16.

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17

Tadjiev, Shukhrat, Olimjon Kobilov, Erkinjon Sharopov, Jurabek Choriyorov, and Abdugoffor Bahriddinov. "Classification of systems for opening reserves beyond the limit contour of the quarry of upland deposits." E3S Web of Conferences 417 (2023): 01006. http://dx.doi.org/10.1051/e3sconf/202341701006.

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The article considers the systems of opening the contiguous reserves of upland deposits and develops their classification. Proposed classification takes into account the development of both portside and sub-quarry reserves in an open-underground way using the quarry space. Opening workings of sub-quarry reserves are carried out outside the boundaries of the quarry.
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18

Cherepanov, V. A., and I. A. Glebov. "Factors influencing the opening scheme deep horizons of quarries with the use of sloping underground transport development." Mining informational and analytical bulletin, no. 3-1 (March 20, 2020): 351–67. http://dx.doi.org/10.25018/0236-1493-2020-31-0-351-367.

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The questions of improving the technology of completion of deposits are closely associated with an increase in the efficiency of technological processes and introduction of new methods and means of mechanization, optimization of process parameters to minimize the cost and increase the intensity of mining works in conditions of changing parameters of the working area depth of mining. For different conditions of completion of deposits by open-underground method, depending on the volume of traffic and parameters of quarries, it is proposed to use the appropriate underground transport workings. Optimization of the parameters of the sides of the quarry allows to increase the slope angle and increase the cost-effective depth of open-pit development. As one of the possible ways of refining deposits, the use of inclined underground transport workings is proposed by developing a quarry with a tunnel opening zone, or using underground mining operations, but without building capital vertical shafts. The article presents the factors that influence the opening scheme deep horizons of quarries with the use of sloping underground transport development with using articulated trucks and road trains. The factors are the basis for further search of rational parameters of openunderground technology of completion of instrument and sub-barrier reserves. To assess the depth of the transition to the opening scheme using the tunnel opening zone, it is necessary to take into account a number of factors: mining, technical, and economic. The results of such calculations are given in the article. The application of the proposed technology will increase the completeness of field development due to the involvement in the development of instrument and sub-barrier reserves, which is an urgent task in connection with the upcoming achievement of the stage of completion of deposits at many mining enterprises, both in the near future and in the long term.
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Samsudin, Nurul Asma, Zulkarnain Zainal, Hong Ngee Lim, et al. "Capacitive performance of vertically aligned reduced titania nanotubes coated with Mn2O3 by reverse pulse electrodeposition." RSC Advances 8, no. 41 (2018): 23040–47. http://dx.doi.org/10.1039/c8ra03513j.

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20

Nikiforova, N. A., I. L. Safronov, V. I. Stetsuk, and V. O. Momot. "Study of covering rocks of novo-dmitrovsk deposits of brown coal with the purpose of using as building materials." Science and Transport Progress, no. 40 (April 25, 2012): 135–39. http://dx.doi.org/10.15802/stp2012/7023.

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Bui, Huy Hoang, and Quang Tuan Nguyen. "Early-Middle Jurassic lithological and depositional facies of the Da Lat back-arc basin." Petrovietnam Journal 3 (April 18, 2022): 4–13. http://dx.doi.org/10.47800/pvj.2022.03-01.

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The Da Lat back-arc basin formed on a deformed lithosphere caused by subduction of the Paleo-Pacific plate under Eurasia in the Mesozoic.
 Lithology and sedimentary structure analysis from field works and UAV imaging show that the Early-Middle Jurassic deposits in this area can be divided into 7 types of litho-depositional facies: (i) coastal conglomerate; (ii) channel/shallow lake sandstone; (iii) shoreface sandstone; (iv) estuarine siltstone and mudstone; (v) deep marine shale; (vi) mass transport deposits; and (vii) turbidite.
 These facies’ spatio-temporal distributions are closely related to their grain size. In the basin margin, Early Jurassic coarse-grained deposits are exposed, marking the opening of the basin, grading upward into shallow marine-shelf deposits. In the Middle Jurassic, the basin margin was uplifted corresponding to continental depositional environment, while the basin centre was filled by outer shelf deposits, reflecting a deepening process. Interbedding with these deposits are near shore and estuarine deposits.
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Tomić, Aleksandra. "Ranking of potential coal deposits in order to make investment decisions to open new mines in Serbia." Podzemni radovi, no. 39 (2021): 43–56. http://dx.doi.org/10.5937/podrad2139043t.

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For investments in the field of coal exploitation in the Republic of Serbia, in the future investment analyzes show significant results, although the "Green Agenda" aims to reduce until the end of this process in 2050. New ore and mineral deposits are also emerging, which will also require the opening of new mines in the future, and the choice of investment variant by ranking potential deposits directly depends on the amount of reserves but also on high environmental standards.
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23

Hegde, Kavita R., Adam C. Puche, Henryk Szmacinski, et al. "Fluorescence Lifetime Imaging of Human Sub-RPE Calcification In Vitro Following Chlortetracycline Infusion." International Journal of Molecular Sciences 24, no. 7 (2023): 6421. http://dx.doi.org/10.3390/ijms24076421.

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We have shown that all sub-retinal pigment epithelial (sub-RPE) deposits examined contain calcium phosphate minerals: hydroxyapatite (HAP), whitlockite (Wht), or both. These typically take the form of ca. 1 μm diameter spherules or >10 μm nodules and appear to be involved in the development and progression of age-related macular degeneration (AMD). Thus, these minerals may serve as useful biomarkers the for early detection and monitoring of sub-RPE changes in AMD. We demonstrated that HAP deposits could be imaged in vitro by fluorescence lifetime imaging microscopy (FLIM) in flat-mounted retinas using legacy tetracycline antibiotics as selective sensors for HAP. As the contrast on a FLIM image is based on the difference in fluorescence lifetime and not intensity of the tetracycline-stained HAP, distinguishing tissue autofluorescence from the background is significantly improved. The focus of the present pilot study was to assess whether vascular perfusion of the well tolerated and characterized chlortetracycline (widely used as an orally bioavailable antibiotic) can fluorescently label retinal HAP using human cadavers. We found that the tetracycline delivered through the peripheral circulation can indeed selectively label sub-RPE deposits opening the possibility for its use for ophthalmic monitoring of a range of diseases in which deposit formation is reported, such as AMD and Alzheimer disease (AD).
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Nguyen Phi, Hung, and Thang Pham Duc. "Using Topographic Advantages in Formulating a Strategy to Access Ore Bodies at Ban Phuc Nikel Mine." E3S Web of Conferences 174 (2020): 01013. http://dx.doi.org/10.1051/e3sconf/202017401013.

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There are various types of underground mining that are categorized based on the kind of shafts used, the technique of extraction and the process used to get to a deposit. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. To start the mining, the first step is to make the path to go down. Development, the work of opening a mineral deposit for exploitation is performed. With it begins the actual mining of the deposit. Access to the deposit must be gained either by stripping the overburden, which is the soil and/or rock covering the deposit,to expose the near- surface ore for mining or by excavating openings from the surface to access more deeply buried deposits to prepare for underground mining. The type of underground mining technique used is typically based on the geology of the area, especially the amount of ground support needed to make mining safe. When using to exploit ore body by underground mining method, the textbook guide in universities of Vietnam had had 4 main strategies include: access by horizontal tunnel lines, access by incline shaft, vertical shaft and combination of above access method. In this study, we developed a solution outside of four above approaches, to take advantage of the topography, transport potential energy, and advantages when constructing sloped incline, backward from outside to inside.
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Latif, Dnya Abdualwahab, Yousif Osman Mohammad, and Musher Mustafa Baziani. "Mineralogy and Origin of the Manganese Deposit in the Sulaimani Province, Kurdistan Region of Iraq: Insight to Serpentinization-Induced Manganese Production Scenario." Iraqi Geological Journal 55, no. 1F (2022): 178–200. http://dx.doi.org/10.46717/igj.55.1f.15ms-2022-06-30.

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The Manganese deposits in Sulaimani metallogenic province mainly occur within the top Qulqula Radiolarite chert unit of the Penjween ophiolite complex as strata bound type deposits near Kani Saif village, 15 km south of the Penjween district within the Imbricated zone, Kurdistan Region of Iraq. A restricted occurrence of massive manganese boulders was identified, 1 km north to the Mawat District, associated with the Oligocene Merga Red beds Group. The Qulqula Radiolarite represents the Middle Jurassic-Early Cretaceous sedimentary cover of Neo-Tethys oceanic crust deposits throughout the early to mature stages of the Neo-Tethys ocean opening along the northern and eastern margins of the Afro-Arabian plate. The field and petrographical data indicated that the nature of manganese mineralization in the area is of various forms including veins, brecciated, micronodules, banded and massive types. Reflected light microscopy, high resolution scanning electron microscope and X-ray diffraction reveal that the mineral assemblages are dominated by barunite, rhodinite, hematite, quartz and carbonate for the massive metamorphosed type deposit in the Mawat area. Meanwhile, the mineralogy of the vein, micronodule and banded types are simple and dominated by pyrolusite, hollandite minerals close to Kain Saif village. Combinations of the modal manganese minerals, filed and textural observations, a paragenetic-time model suggests that the manganese deposit in the area formed via a sequence of multiple processes (1) serpentinization of the upper mantle at mid oceanic ridge during the Cretaceous period, (2) deposition from diluted hydrothermal fluids in the Neo-Tethys mature oceanic basin, (3) the diagenetic modification of the manganese bearing sediment and (4) metamorphism of sediment a combing Zagros orogeny in Paleogene. Overall data suggest that the manganese deposits in the Kurdistan region of Iraq are cogenetic and spatially related to those which occur along the entire margin of the Arabian plates from Oman to Turkey associated with the radiolarite facies.
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Badina, Tenny, Ina Indriana, and Yeni Januarsi. "DAMPAK OFFICE CHANNELLING TERHADAP KENAIKAN THIRD PARTY DEPOSITS DAN RETURN ON ASSETS UNIT USAHA SYARI'AH." Media Riset Bisnis & Manajemen 9, no. 2 (2009): 201–16. http://dx.doi.org/10.25105/mrbm.v9i2.1082.

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The objectives of the research is to study and to analyze empirically the influence of office channelling on third party deposits and return on assets in Indonesian sharia business unit. Third party deposits and return on assets are used as indicators of sharia business unit performance after opening new branchs through office channelling program. The research uses korelasional method.The number of sharia business units taken as samples in the research cover about 10 sharia business unit in Indonesia which already publicate theirs own financial statements separated from their conventional banks financial statements. The data were analyzed using Ordinary Least Square Method.The result show that, firstly, office channelling statistically significant influence third party deposits, but secondly, office channelling statistically insignificant influence return on assets. This unpredicted result shows that the increase of third party deposits through office channelling program not automatically could increase return on assets. We found that the sharia business unit couldn't yet opfimally response the increase of third party deposits. The increasing of third party deposits were not followed yet by the good atocafions of fund.Keywords : Office channelling, Third party deposits, Return on assets, Sharia business unit, Performance
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27

Panchenko, V., and V. Yakovleva. "Exploration and estimation of amber deposits in 1979-1980 (to 155th anniversary of Pavlo Tutkovsky’s birthday)." Ukrainian Geologist, no. 2(42) (August 15, 2013): 155–59. http://dx.doi.org/10.53087/ug.2013.2(42).246146.

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Федорин, В. А., В. Я. Шахматов та Р. И. Шишков. "АНАЛИЗ ГЕОТЕХНОЛОГИЧЕСКИХ СТРУКТУР ОТКРЫТО-ПОДЗЕМНОЙ РАЗРАБОТКИ УГОЛЬНЫХ МЕСТОРОЖДЕНИЙ КУЗБАССА". Вестник Научного центра ВостНИИ по промышленной и экологической безопасности, № 4-2020 (25 грудня 2020): 80–86. http://dx.doi.org/10.25558/vostnii.2020.21.22.003.

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Рассмотрена технология отработки пологих пластов угольных месторождений открыто-подземным способом с продольно-поперечной системой вскрытия разреза в совокупности с применением шахтных участков. Приведено описание и ключевые характеристики технологических решений освоения угольных месторождений открытым и комбинированным способами. The technology of shallow seams mining of coal deposits by the open-underground method with a longitudinal-transverse system of opening the section in combination with the use of mine sites is considered. The paper provides a description and key characteristics technological solutions for the development of coal deposits by open and combined methods.
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Ostapenko, N. S., and O. N. Neroda. "ON THE ROLE OF ENDOGENOUS AND EXOGENOUS FACTORS IN THE FORMATION OF HIGH-GRADE ORES AND ORE SHOOTS IN VEIN BODIES OF THE TOKUR LOW-SULFIDE GOLD DEPOSIT (PRIAMURYE, RUSSIA)." Tikhookeanskaya Geologiya 44, no. 2 (2025): 51–71. https://doi.org/10.30911/0207-4028-2025-44-2-51-71.

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Using the Tokur low-sulfide gold-quartz deposit as an example, the long-debated problem of genesis and relationships of primary and secondary ore shoots at low-sulfide gold-quartz deposits (with sulfide contents range from 0.5 to 2.5 %) is considered as the basis for assessing their potential for economic mineralization and choosing a strategy for exploration or follow-up exploration of ore targets of this mineragenic type. The study has found that native gold in primary and oxidized ores from vein bodies of the deposit is identical in size of gold particles, primary mineral parageneses, spatial distribution of gold within vein bodies, and composition of fluid inclusions in gold. That is, near-surface gold mineralization at the deposit formed at the hydrothermal stage. No economically important dispersion halos of gold practically occur in the oxidation zone, due to the low grades of gold finely disseminated in sulfides of primary low-sulfide ores (on average, at a level of 15–35 g/t) and small amounts of sulfides in such ore bodies. Consequently, outcrops of high-grade oxidized gold ores found on the surface of low-sulfide deposits should, with a high degree of probability, be considered a reliable indicator of primary ore shoots being localized in them and, consequently, the potential of these vein bodies to host mineralization at depth. This is important to take into account when choosing directions for further exploration at depth and additional in-mine exploration of the deposits which were previously mined only at near-surface levels. Based on the results of studies on the distribution of gold in numerous eroded and «blind» vein bodies of the deposit, the formation of primary gold-ore shoots was spatially and genetically correlated with the zones of maximum cavity opening, that is, the bulging within these vein bodies. The opening of the cavities led to a sharp decrease in fluid pressure in them, its supersaturation with gold and a change in the forms of its transfer. We believe that gold was transported in fluids from the places of the onset of sharp decreases in its pressure to higher levels of localization of ore shoots not only in the form of soluble complexes, but also in a solid-phase form by a mechanism of its natural gas flotation, with the formation of nanonuclei of hydrophobic gold and their associates «Auсr + gas bubbles» on evaporation barriers along the peripheries of released and growing gas bubbles during boiling, heterogenization, degassing and supersaturation of the fluid with gold, gases and other components. We modeled this mechanism of effective solid-phase gold transfer during ore formation in laboratory experiments.
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Khatsenovich, A. M., Y. Tserendagva, E. P. Rybin, et al. "Excavations in the Main Chamber of Tsagaan Agui Cave in 2024." Problems of Archaeology, Ethnography, Anthropology of Siberia and Neighboring Territories 30 (2024): 354. https://doi.org/10.17746/2658-6193.2024.30.0354-0360.

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Tsagaan Agui Cave is a unique archaeological site in North and Central Asia, since it contains Upper and Middle Pleistocene deposits with well-preserved paleontological material and cultural remains down to its oldest layers. Since 2021, we have studied the northern part of the main chamber of Tsagaan Agui. Excavation pit 2 is located under an opening in the cave ceiling, open to the sky, which makes it possible to trace the boundary between relatively undisturbed layers and deposits affected by water and surface sediments flowing in through the opening. In 2021–2023, Pleistocene vertebrate species previously unknown in the region were discovered there, as well as lithic industries in layers 5.2, 5.3, and 7 associated with the bipolar knapping technique. In 2024, our work in excavation pit 2 focused on reducing and removing limestone blocks in the lower part of layer 7. The excavation depth was significantly greater than that recorded in the longitudinal profile along line A in this unit, thus we assume that the cave floor dips toward the cave’s northern wall. Thirty-three lithic artifacts were found in the deposits studied in 2024, all derived from sand lenses. They are the products of bipolar and simple unidirectional-transverse and orthogonal knapping. The 2024 toolkit is represented by a single perforator. Faunal remains were almost absent at the depths excavated. The presumed remains of a giant frog were found. The study of modern natural and climatic conditions prevailing in the Tsagaan Agui region makes it possible to interpret the erosion of layer 1 as the result of water entering from the opening in the northern part of the main chamber of the cave.
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Deng, Jun, Kun-Feng Qiu, Qing-Fei Wang, et al. "IN SITU DATING OF HYDROTHERMAL MONAZITE AND IMPLICATIONS FOR THE GEODYNAMIC CONTROLS ON ORE FORMATION IN THE JIAODONG GOLD PROVINCE, EASTERN CHINA." Economic Geology 115, no. 3 (2020): 671–85. http://dx.doi.org/10.5382/econgeo.4711.

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Abstract The Jiaodong gold province, the largest gold producer in China, formed in a setting dominated by a 30-m.y. episode of Izanagi plate rollback and widespread extension, concomitant with late Mesozoic craton destruction. This study presents new high precision in situ sensitive high-resolution ion microprobe (SHRIMP) U-Th-Pb and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U-Pb ages for hydrothermal monazite from the largest of the Jiaodong gold deposits, which were previously dated as indicating ore formation over a few tens of millions of years when applying sericite Ar-Ar, zircon U-Pb, and less robust analytical techniques. Our U-Pb dating on monazite from the Jiaojia and Linglong deposits in western Jiaodong yielded consistent ages at ca. 120 Ma. The new geochronologic results, coupled with recently reported in situ monazite dates from smaller deposits in western Jiaodong, reveal that the deposits that host most of the ≥4,000-t Au resource formed during a relatively brief period at ca. 120 Ma. In eastern Jiaodong, the much smaller resource may have formed about 5 m.y. later, recorded by 114.2 ± 1.5 Ma gold mineralization at the Rushan deposit. The postsubduction opening of a slab gap at ca. 120 Ma is the most likely cause of the extensive gold mineralization in Jiaodong. The gap induced a local and rapid devolatilization of the hydrated mantle wedge at submelt temperatures. The transient event included release of a major volume of gold-transporting aqueous-carbonic fluid that was stored in the wedge into major NNE-trending structures in the overlying lithosphere.
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Sautkin, R. S., R. A. Khamidullin, and N. I. Korobova. "Fracturing of rich organic formation of north slope South-Tatarian high." Moscow University Bulletin. Series 4. Geology, no. 1 (February 28, 2016): 92–97. http://dx.doi.org/10.33623/0579-9406-2016-1-92-97.

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The problem of studying Domanik deposits and the collection potential is one of the most important. Opening in similar rocks hydrocarbon fields at various depths, considerable variability of reservoir properties, the ambiguity of the establishment of effective thickness - the researchers set the task of their more reliable evaluation.
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Nurzhanova, Gulmira, Galym Myssirov, Olga Zakharova, Tatiana Butova, Zeinegul Yessymkhanova, and Shakizada Niyazbekova. "Features of the security deposit and its impact on sustainable development of economic systems." E3S Web of Conferences 371 (2023): 05052. http://dx.doi.org/10.1051/e3sconf/202337105052.

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The demand for sustainable insurance activities is growing. What could this mean for the future of the insurance business ? This is at the heart of the idea of insurance, and it is necessary to innovate with new products, such as sustainable deposits, which help direct funds to where it is most important for sustainable development. Currently, in the world, the growth rate of leasing different types of vehicles is increasing, For this purpose, the owners of vehicles leasing them need to reduce financial and operational risks. In reducing the risk of leasing vehicles, opening a security deposit for the period of vehicle rental is a positive way out. In this article, we looked at some of the features of a security deposit for a vehicle rental period, depending on the size of the security deposit, the class of vehicle, rental period, and more. Also, considered the risk situations when operating a rental vehicle.
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34

Bugueño, Felipe, Daniela Calle-Gardella, Diana Comte, et al. "Subsurface Insights of the Maricunga Gold Belt through Local Earthquake Tomography." Minerals 12, no. 11 (2022): 1437. http://dx.doi.org/10.3390/min12111437.

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With the advancement of the use of geophysical methods in mining exploration, the possibility of restudying known mineral deposits that could have greater potential than that previously estimated is opening up, as is the case in the Maricunga Belt (MB), which is a metallogenic belt located east of Copiapó, Chile, with a length of 200 km and oriented in the NNE-SSW direction. This belt hosts significant gold deposits classified as porphyry gold (-copper), epithermal gold (-silver) of a high sulphidation type, and transitional gold, in some districts. In this work we studied the characteristics of the MB through local earthquake tomography (LET), which revealed a clear spatial correlation between low Vp/Vs anomalies and the gold deposits, demonstrating that lithologic interpretation using Vp and Vs values of the seismic tomography makes sense for the most common rocks associated with the genesis of porphyry-type deposits. Furthermore, high Vp/Vs anomalies were correlated to the main regional faults around the study zone, which seem to have a robust structural control regarding the location of the deposits.
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35

DUSAR, Michiel, Vital LANGENAEKER, and Laurent WOUTERS. "Permian - Triassic – Jurassic lithostratigraphic units in the Campine basin and the Roer Valley Graben (NE Belgium)." Geologica Belgica 4, no. 1-2 (2002): 107–12. http://dx.doi.org/10.20341/gb.2014.047.

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Permian to Lower Jurassic strata, deposited between Variscan and Cimmerian deformation phases, subcrop in the northeastern Campine basin and Roer Valley Graben (NE Belgium). Total preserved thickness attains 550 m (of which 520 m drilled) in the Campine basin and ca. 1500 m (of which 1250 m drilled) in the Roer Valley Graben. Discovery of these concealed deposits is due to coal exploration of the Campine basin; further interest is linked to their potential for energy production or storage. Permo-Triassic sediments displaying Germanic facies were deposited on the southern margin of the Southern Permian Basin; Pangaea break-up associated with opening of the North Atlantic created conditions for deposition of the fully marine Jurassic sediments. Therefore, the stratigraphical succession in northeastern Belgium is closely related to the Dutch stratigraphical nomenclature.
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Ksendzenko, Lyudmila. "Factors influencing the characteristics dependence of zonal structure rock failure around lined opening." E3S Web of Conferences 56 (2018): 02028. http://dx.doi.org/10.1051/e3sconf/20185602028.

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For the safe mining operations, it is necessary to take into account a large number of negative factors, one of which is zonal failure (disintegration) of rocks that occurs after developing deposits at great depths.Therefore, investigation of the behavior of zonal mesostructures regularities around deep mine openings is relevant.In this paper dependences from influencing factors of the first failure zone radial extent, of the depth of the contour zone and the first failure zone merging, and the depth of the second failure zone appearance are established based on the non-Euclidean model of the zonal failure rock mass around deep lined openings and the Odintsev’s criterion of the failure under compression.The influencing factors are the uniaxial compression strength of the rock σс (MPa); the opening depth H (m); the ratio of empirical coefficients γ3 / γ1 ; the values of the rocks elastic modulus, E, and the Poisson’s ratio, γ. The study was carried out both for hard and weak rocks at values resistance of support 0.5 and 1 MPa.
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Herbei, Mihai Valentin, Roxana Claudia Herbei, and Larisa Ofelia Filip. "Spatial Representation of Useful Minerals Deposits." Mining Revue 27, no. 2 (2021): 84–92. http://dx.doi.org/10.2478/minrv-2021-0019.

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Abstract Starting from the fact that in the mining industry and in general in the field of underground constructions, the topographic activity, regardless of which of its manifestations, conditions and substantiates the achievement of economic and technological objectives, implicitly resulting in the dependence between topographic precision and qualitative and quantitative performance of mining. The level at which the professional responsibility of the topographic activity, as a whole is engaged in the achievement of some proposed objectives, depends on the framework resulting from the technological complexity of the mining activity in the conditions of its restructuring and efficiency. Spatial representations of useful mineral deposits in the earth's crust, which meet the quality conditions necessary for the design of underground mining works, can be used to choose the most efficient methods of opening, preparation and exploitation of useful mineral deposits. These analyzes are the basis for the realization of underground topographic networks that have a precise connection with the topographic base at the surface. The use of stereographic projection and stereographic networks can be achieved by faithfully representing the tectonics and positioning of deposits of useful mineral matter inside the earth's crust.
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38

Rooyakkers, Shane M., John Stix, Kim Berlo, and Simon J. Barker. "Emplacement of unusual rhyolitic to basaltic ignimbrites during collapse of a basalt-dominated caldera: The Halarauður eruption, Krafla (Iceland)." GSA Bulletin 132, no. 9-10 (2020): 1881–902. http://dx.doi.org/10.1130/b35450.1.

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Abstract Deposits of the ca. 110 ka Halarauður eruption of Krafla caldera (reconstructed volume = 7 ± 6 km3 dense rock equivalent) include the only spatter-rich ignimbrite known in Iceland, and an exceptionally rare lava-like basaltic ignimbrite. We present a revised stratigraphy and new whole-rock major-element data set for products of this unusual event, one of only three Quaternary ignimbrite eruptions identified in Iceland. Compositions of Halarauður products span a broad range (50.0–74.6 wt% SiO2), reflecting mixing of rhyolite with underplating basalt. Small-volume, valley-ponded, basal pumice- and spatter-bearing lithic breccias and ignimbrite (rhyolite to andesite) reflect rapid column collapse during early opening of ring-fault vents. A transition to voluminous, regionally dispersed spatter agglomerates (dacite to basaltic andesite) marks an abrupt eruptive intensification, as gas-poor magma was squeezed into a developing ring-fault system by the subsiding chamber roof. Spatial heterogeneities in ascent rates and outgassing through this variably dilated fault system caused coeval formation of collapsing plumes and spatter fountains at separate vents. Spatter was entrained into flows from the more explosive vents, which deposited proximal spatter agglomerates and more distal spatter-bearing ignimbrite. Overlying lava-like ignimbrite deposits (basaltic andesite to basalt) reflect a final opening of vents, as mafic magma from deep levels of the chamber was squeezed through a dilated ring-fault system by the subsiding roof block and erupted at uncharacteristically high mass flux. Development of a mature ring-fault conduit system during early tapping of silicic magma appears to be a prerequisite for the emplacement of welded basaltic ignimbrites, and it should be considered as a possible eruption scenario in basalt-dominated systems where silicic magma has been known to also accumulate. Poor preservation of the Halarauður deposits exemplifies the challenges of studying ignimbrite eruptions in frequently glaciated regions like Iceland, where they may be more common than the geological record suggests.
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39

KARAZHANOVA, M. K., and A. G. KASSANOVA. "THE PROBLEM OF PRESERVING THE RESERVOIR PROPERTIES OF PRODUCTIVE HORIZONS – THE CURRENT STATE." Neft i Gaz 138, no. 6 (2023): 93–100. http://dx.doi.org/10.37878/2708-0080/2023-6.10.

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The reasons for the deterioration of reservoir properties of productive layers during their opening are considered. Special attention is paid to the study of geological properties of emulsions of the drilling mud filtrate – oil type. Productive deposits on the example of the fields of Southwestern Turkmenistan are characterized by a complex and ambiguous composition of rocks, waters and drilling mud and oil. Each of the components, interacting with the filtrate of the drilling mud, determines the deterioration of reservoir properties and a decrease in the flow rates of hydrocarbon fluids. Oilbased solutions were used to open productive horizons while maintaining natural permeability, as well as for drilling in particularly unstable clay saline deposits. In such solutions, the dispersion medium is represented by diesel fuel, and the dispersed phase is finely ground oxidized bitumen. The results obtained make it possible to clarify the mechanism of reducing the reservoir properties of productive formations due to the penetration of filtrate of drilling fluids, as well as to formulate new requirements for technologies, composition and properties of drilling fluids for opening productive formations.
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40

Wrobel-Daveau, Jean-Christophe, and Graeme R. Nicoll. "PLATE TECTONICS AS A TOOL FOR GLOBAL SCREENING OF MAGMATIC ARCS AND PREDICTIONS FOR RELATED PORPHYRY DEPOSITS." Economic Geology 117, no. 6 (2022): 1429–43. http://dx.doi.org/10.5382/econgeo.4944.

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Abstract The formation of most mineral deposits is closely linked to a geodynamic context—for example, the association of porphyry Cu-Au-Mo deposits with subduction and development of volcanic arcs. This paper proposes a new approach to the global screening of volcanic arcs and their duration, as a predictive method for a mineral systems-based approach (e.g., discovery of potential porphyry occurrences). The method utilizes geospatial and temporal analytics run on a combination of large global data sets and a global plate tectonic model (covering the time period 600 Ma to present) containing plate boundaries. The method involves (1) calculating present-day arc volcano-to-trench distances and obtaining average volcanic-arc widths in both continental and intraoceanic settings, (2) applying these values to the paleotrenches contained in the plate tectonic model on 53 time intervals spread throughout the Phanerozoic, (3) unreconstructing the results back to present day, and (4) summing up all magmatic arc occurrences using their cumulative durations. This results in a spatiotemporal model of the total cumulative duration of magmatic arc activity at the global scale, back to 600 Ma, that is updatable and can serve as a proxy to predict porphyry deposit likelihood. The model output is tested against a porphyry copper occurrence data set to validate the approach as a predictive proxy for arc-related porphyry deposits. The alignment of the model results with data control is high for most geologic time periods throughout the Phanerozoic—up to 90% in the case of buffered (1σ) magmatic arcs and up to 100% in the case of buffered magmatic arcs with an additional search distance (2σ). Recent advances in plate tectonic model quality and detail now offer a higher level of precision and confidence than ever before and enable tools for the prediction and screening of porphyry deposit locations, as well as opening the potential to screen for other geodynamic context-dependent commodities (e.g., orogenic gold, volcanogenic massive sulfide, or Ni and platinum group element-sulfide deposits), particularly in the search for poorly exposed or subsurface orebodies.
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Osacký, Marek, Tomáš Binčík, Tomáš Paľo, Peter Uhlík, Jana Madejová, and Adriana Czímerová. "Mineralogical and physico–chemical properties of bentonites from the Jastrabá Formation (Kremnické vrchy Mts., Western Carpathians)." Geologica Carpathica 70, no. 5 (2019): 433–45. http://dx.doi.org/10.2478/geoca-2019-0025.

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Abstract In the past years an increasing demand for bentonites resulted in the opening of new bentonite deposits in the Jastrabá Formation. The shortage of information, in particular analytical data, on the bentonites from the newly opened Jastrabá Fm. deposits was the motivation for the current study. Smectite is the predominant mineral in all bulk bentonites from the new deposits. Its amount varied between 43 and 90 wt. %. The bulk bentonites also contain variable amounts (10–57 wt. %) of mineral admixtures such as feldspars, mica, opal-CT, kaolinite, quartz and sometimes goethite. The smectite mineral comprising the studied bentonites was montmorillonite. The octahedral Al in the structure of montmorillonite was partially substituted by Mg, and to a lesser extent by Fe. The interlayer space of montmorillonite is occupied predominantly by divalent exchangeable cations (Ca2+ and Mg2+). The dehydroxylation temperature of smectites (>600 °C) determined on the DTG curves indicates the presence of the cis-vacant variety of montmorillonites. The mean crystallite thicknesses of smectites (TMEAN) calculated by BWA analyses ranges from 7.2 to 11.5 nm. The shape of the crystallite thickness distributions (CTDs) for smectites is lognormal in all cases. Cation exchange capacity (CEC) and total specific surface area (TSSA) increases with increasing amount of smectite. The CEC of 101 meq/100g and TSSA of 616 m2/g correspond to bulk bentonite from the Stará Kremnička III deposit containing 89 wt. % of smectite.
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Stern, Karen B. "Opening Doors to Jewish Life in Syro-Mesopotamian Dura-Europos." Journal of Ancient Judaism 9, no. 2 (2018): 178–200. http://dx.doi.org/10.30965/21967954-00902004.

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Analyses of the synagogue discovered in the ancient town of Dura Europos commonly emphasize connections between the construction and decoration of the building and aspects of Jewish life along the Roman eastern frontier. By focusing on lesser-known data from the synagogue, including burial deposits found inside its doorways, as well as examples of non-monumental writings and art (graffiti) from its interior, this article offers distinct insights into the cultural horizons of those who used and visited the structure. Closer consideration of the locations and contents of associated finds and their comparisons with analogues discovered in Dura and throughout the Syro-Mesopotamian world collectively advance new hypotheses about how visitors to the synagogue behaved inside its varied spaces and used acts of object-burial and writing to manipulate and reshape its walls, doorways, thresholds, and floors. The impetus to reconsider deposits of writing and objects from the Dura synagogue from this vantage, in its Syro-Mesopotamian context, owes to the recent publication of additional finds from other parts of the town. These augmented local comparisons for the synagogue evidence particularly reveal dynamic and otherwise unidentified continuities between devotional behaviors and spatial practices conducted by local and regional Jews and Christians, neighboring Durenes, and other inhabitants of Syrian, Mesopotamian, and Persian cities. These similarities, at times, can overshadow connections traditionally emphasized between daily life in Dura and the provincial world of Rome. Working outwards from the synagogue evidence, this approach ultimately demonstrates that many Durenes, whether Jews or their neighbors, engaged in daily devotional acts, in distinctive locations, which reflected, transformed, and responded to their local Syrian, Mesopotamian, and Arsacid cultural orbits.
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43

Stognii, P. V., N. I. Khokhlov, and I. B. Petrov. "Numerical modelling of wave processes in multilayered media with gas-containing layers: the comparison of 2D and 3D models." Доклады Академии наук 489, no. 4 (2019): 351–54. http://dx.doi.org/10.31857/s0869-56524894351-354.

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Today the Arctic region exploration is one of the most important courses for research in our country because large amounts of unexplored oil and gas deposits are located there. Large deposits of hydrocarbons are situated in water areas of the North seas. Gas explosions complicate the development of hydrocarbon deposits in these water areas. They occur as a result of an accidant opening and further spread of gas. It is impossible to carry out the frequent exploration of the area with gas layers, then the numerical modelling of the area with already detected gas deposits is conducted. In this work, we present the results of numerical modelling of seismic waves spread in multilayered geological models with gas-containing inclusions during the four-year period with the use of the grid-characteristic method. Then, the wave patterns of seismic reflections and seismograms for the described problem were obtained. We conducted the comparison of wave patterns and seismograms for the 2-dimensional and 3-dimensional cases. The results demonstrated a good coincidence.
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Senécal, Jean-François, Frédérik Doyon, and Benoît St-Onge. "Discrimination of canopy gaps and non-regenerating openings in old-growth temperate deciduous forests using airborne LiDAR data." Canadian Journal of Forest Research 48, no. 7 (2018): 774–82. http://dx.doi.org/10.1139/cjfr-2017-0340.

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The use of LiDAR in the study of gap regimes has seen significant progress in recent years. Researchers have assumed that canopy gaps detected in this manner are ecologically equivalent to gaps sampled in situ by more traditional methods. However, those latter methods usually include canopy gaps only and ignore non-regenerating openings that are produced by causes limiting tree establishment. We developed a predictive model capable of discriminating between canopy gaps and non-regenerating openings using LiDAR-derived data. Selected predictive variables were related to conditions that limit tree establishment such as zones of moisture accumulation and steep slopes or to the resulting vegetation physiognomy. The model was applied to three old-growth maple forests to predict the fractions of canopy openings belonging to these two types. On average, non-regenerating openings represented 19.5% of the total area detected as canopy openings and occupied 1.37% of the sites. Canopy gaps formed 80.5% of the total area in canopy openings and covered 5.71% of sites that were studied. The non-regenerating opening seemed more frequent on thin surficial deposits. The canopy gap fraction was similar among study sites but had lower values than usually reported for temperate deciduous forest.
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45

Heinz, Sanda S., and Elsbeth M. van der Wilt. "Defining the Foundation Deposit in the Late and Ptolemaic Periods." Journal of Egyptian Archaeology 105, no. 2 (2019): 227–41. http://dx.doi.org/10.1177/0307513320902479.

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In this article, we take a closer look at the process and contents of caching in the Sacred Animal Necropolis at North Saqqara. Most of the contents of the approximately 68 caches are unpublished, but we are using the information preserved in the excavation archive held at the Egypt Exploration Society in London. This study has three parts. First, we take a closer look at the conceptual categorization of caches, followed by a review of a particular deposition practice, that of foundation deposits. Then we consider in detail four caches of bronzes found during British excavations at the North Saqqara Sacred Animal Necropolis. Finally, we argue that these caches point towards a conceptual blending of foundation deposits with other categorizations of caches in the Late and Ptolemaic periods, opening up the possibility that new types of foundation deposits, otherwise unrecognized, may be added to the known corpus.
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Vaziri, Seyed Hamid, and Marc Laflamme. "Lithostratigraphy and sedimentary environment of the Precambrian Kushk Series of central Iran." Canadian Journal of Earth Sciences 55, no. 11 (2018): 1284–96. http://dx.doi.org/10.1139/cjes-2017-0234.

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The Kushk Series is a distinctive late Ediacaran succession occurring in the Bafq and Behabad regions of central Iran that has yielded an extensive community of diverse Ediacara biota, including several Precambrian (Chuaria) and Ediacaran (Cloudina, Corumbella) index fossils. The Kushk Series reaches a thickness of up to 518 m and consists of shallow to deep subtidal deposits along a homoclinal carbonate ramp during a transgression–regression cycle. These deposits accumulated as part of an extensional rift basin complex resulting from the opening of the Proto–Paleotethys Ocean in northeastern Gondwana. Latest Ediacaran fossils occur in the deep-water calcareous marine shales and represent a thriving community at the dawn of animal life.
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47

Glebov, A. V. "TECHNOLOGICAL PECULIAR FEATURES IN DEPOSIT OPENING OF SOLID MINERALS WHILE USING ARTICULATED DUMP TRUCKS." Science & Technique 17, no. 3 (2018): 238–45. http://dx.doi.org/10.21122/2227-1031-2018-17-3-238-245.

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The paper provides an analysis for production of four-wheel drive dump trucks with an articulated frame and it also describes a practical experience pertaining to operation of dump trucks as mining automotive transport. Technical characteristics for some models of articulated dump trucks manufactured in Russia and Belarus are presented in the paper. The paper gives examples for transportation of run-of-mine ore at enterprises of Russia and abroad. The attention has been focused on specific features concerning organizational, technological and design decision making while introducing and promoting articulated dump trucks. It has been established that articulated dump trucks make it possible to improve an efficiency of mine development during construction period and when ore mining and processing enterprises are put into operation especially in geographically remote and inaccessible areas. The paper proposes technological solutions allowing to expand the scope of articulated dump truck application at mining enterprises while using them for quarry development excavating deep deposits of solid minerals. It has been revealed that reduction in overburden volume can be achieved by transition from a certain depth to lower capacity dump trucks or special dump trucks operating on elevated slopes of roads. The paper shows that one of perspective directions for development of mining technology on kimberlite deposits is an opening of lower quarry horizons by peripheral road tunnels of spiral shape while using articulated dump trucks. The presented technological solutions require further research and design consideration and study and they will allow to ensure resource efficiency and safety of surface mining while extracting minerals at previously uneconomic ore deposits. In order to realize an import substitution program for four-wheel drive dump trucks with an articulated frame it is necessary to carry out marketing research on potential market for machines of this class required for open-pit mining in order to justify prospects for provision of the Russian production market.
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Chetvertneva, I. A., A. Yu Abusal Yousef, A. D. Kondrashina, M. A. Bukin, R. R. Mukhammadiev, and A. N. Giniyatullin. "OVERVIEW OF UNDERBALANCED WELL COMPLETION TECHNOLOGIES." Problems of Gathering Treatment and Transportation of Oil and Oil Products, no. 3 (June 20, 2025): 9–26. https://doi.org/10.17122/ntj-oil-2025-3-9-26.

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Depletion of oil fields, increase in the number of inclined and horizontal wells makes the problem of improving the quality of opening up productive deposits increasingly urgent. One of the ways to solve this problem is to develop specialized solutions for well completion, providing minimal contamination of the near-wellbore area by reducing the level of repression and filtration. The article is devoted to the analysis of oil well completion technologies under conditions of low reservoir pressures, which provide for opening up productive formations under depression conditions. When applying this technology, the conditions required to prevent possible gas, oil and water shows by regulating the properties of the drilling fluid when affecting the bottomhole formation zone are considered. The values of the critical density of drilling fluids are proposed to maintain the stability of clay rocks when using the technology under depression conditions when opening up productive formations. Methods for opening up formations under depression using coiled tubing drilling and booster technology are presented, the disadvantages and advantages of these technological solutions for increasing well productivity are considered.
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Ju, Nan, Gao Yang, Dongfang Zhao, et al. "Geology, Mineralization and Development Potential of Rare and Uncommon Earth Ore Deposits in Southwest China." Minerals 15, no. 5 (2025): 459. https://doi.org/10.3390/min15050459.

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The southwestern region of China is tectonically situated within the Tethyan tectonic domain, with the eastern part comprising the Upper Yangtze Block, while the western orogenic belt forms the main part of the Tibetan Plateau. This belt was formed by the subduction of the Paleo-Tethys Ocean and subsequent arc-continent collision, and was later further modified by the India-Asia collision, resulting in complex geological structures such as the Hengduan Mountains. The lithostratigraphy in this region can be divided into six independent units. In terms of mineralization, the area encompasses two first-order metallogenic domains: the Tethyan-Himalayan and the Circum-Pacific. This study synthesizes extensive previous research to systematically investigate representative rare earth element (REE) deposits (e.g., Muchuan and Maoniuping in Sichuan; the Xinhua deposit in Guizhou; the Lincang deposit in Yunnan). Through comparative analysis of regional tectonic-metallogenic settings, we demonstrate that REE distribution in Southwest China is fundamentally controlled by Tethyan tectonic evolution: sedimentary-weathered types dominate in the east, while orogenic magmatism-related types prevail in the west. These findings reveal critical metallogenic patterns, establishing a foundation for cross-regional resource assessment and exploration targeting. The region hosts 32 identified REE occurrences, predominantly light REE (LREE)-enriched, genetically classified as endogenic, exogenic, and metamorphic deposit types. Metallogenic epochs include Precambrian, Paleozoic, and Mesozoic-Cenozoic periods, with the latter being most REE-relevant. Six prospective exploration areas are delineated: Mianning-Dechang, Weining-Zhijin, Long’an, Simao Adebo, Shuiqiao, and the eastern Yunnan-western Guizhou sedimentary-type district. Notably, the discovery of paleo-weathering crust-sedimentary-clay type REE deposits in eastern Yunnan-western Guizhou significantly expands regional exploration potential, opening new avenues for future resource development.
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Bragina, O. A., V. A. Moiseev, V. P. Nizovtsev, I. D. Tashkevich, A. G. Vakhromeev, and S. A. Sverkunov. "Methods of post-opening increase of rocks permeability in productive terrigenous and carbonate deposits." Construction of Oil and Gas Wells on Land and Sea, no. 8 (2021): 52–59. http://dx.doi.org/10.33285/0130-3872-2021-8(344)-52-59.

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