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1
Eroshenko, Nikolay V., Natalya S. Areshina y Alexander G. Kasikov. "Improvement of the deleading roasting nickel dust technology of the Joint Stock Company “Kola Mining and Metallurgical Company”". Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences 13, n.º 1/2022 (27 de diciembre de 2022): 85–89. http://dx.doi.org/10.37614/2949-1215.2022.13.1.014.
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The article deals with the problem of reducing the loss of silver during the deleading of fine kiln dust from the nickel production of the Kola MMC. It has been shown that an increase in the degree of silver recovery is achieved by using sodium sulfate solutions or filtrates of water leaching of dust purified from selenium and tellurium as sulfate-containing reagents at the stage of lead sulfate precipitation. This ensures the subsequent separation of silver and lead by sulfite leaching and the production of selective concentrates.
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Skripnik, Igor, Dmitry Savelev, Tatyana Kaverzneva y Nina Rumyantseva. "Implementation of a risk-based OHS management system at IMC mining company". E3S Web of Conferences 376 (2023): 05031. http://dx.doi.org/10.1051/e3sconf/202337605031.
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IMC mining company produces gold and silver. In mining operations that are carried out every day in the workplace, there must be dangers and risks. All these hazards are more related to the transport systems and transport used in the mining process. International mining company (IMC) underground mines definitely have operations division jobs with a high level of risk against work accidents, for example, maintenance of transport installations and the systems. Therefore, it is important to identify hazards, risk assessments, and determine the type of risk control in the section where work accidents are found. Hazard Identification and Risk Assessment Determining Control is a prevention program against fatal incidents. Risk Management at IMC is based on the Hazard Identification and Risk Assessment Determining Control (HIRADC) methodology which focuses on managing mining safety risks. This article aims to find out what the potential hazards and risks are contained in the work of the engineering and transport of underground mining division as well as provide preventive measures to reduce these risks.
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Aditya, Muhammad, Elwisam Elwisam y Kumba Digdowiseiso. "The Influence of Profitability, Liquidity, Capital Intensity, Solvency and Company Size on Tax Aggressiveness in Mining Sector Companies Listed on the Indonesian Stock Exchange for the 2015–2019 Period". Jurnal Syntax Admiration 4, n.º 2 (25 de febrero de 2023): 406–23. http://dx.doi.org/10.46799/jsa.v4i2.886.
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Indonesia is Wrong One country Which own riches source Power the largest natural and human resources in the world with a mining industry material the excavation originate from oil And gas earth, coal, copper, gold, silver, nickel and tin. It is conditions like this that attract entrepreneurs to establishing companies in Indonesia, both local and foreign companies with exists existence company the can give profit for Indonesia in increase income country specifically from sector tax. Matter This is interesting for the author to analyze the influence of profitability, liquidity, capital intensity , solvency And size company to aggressiveness tax on mining sector companies listed on the Indonesian Stock Exchange period 2015-2019. In this research the author used secondary data in get from site www.idx.co.id with amount Population Company Which reaching 49 companies in the mining sector listed on the Stock Exchange Indonesia. This research sample used purposive sampling and was selected of 21 sample companies according to certain criteria. Results of this research showing that profitability, liquidity, capital intensity, solvency and size the company has a significant influence on tax aggressiveness.
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Damayanti, Lucyana Salsabilla, Elwisam Elwisam y Kumba Digdowiseiso. "The Influence of Profitability, Liquidity, Capital Intensity, Solvency and Company Size on Tax Aggressiveness in Mining Sector Companies Listed on the Indonesian Stock Exchange for the 2015–2019 Period". Jurnal Syntax Admiration 4, n.º 2 (25 de febrero de 2023): 386–400. http://dx.doi.org/10.46799/jsa.v4i2.885.
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Indonesia is Wrong One country Which own riches source Power the largest natural and human resources in the world with a mining industry material the excavation originate from oil And gas earth, coal, copper, gold, silver, nickel and tin. It is conditions like this that attract entrepreneurs to establishing companies in Indonesia, both local and foreign companies with exists existence company the can give profit for Indonesia in increase income country specifically from sector tax. Matter This is interesting for the author to analyze the influence of profitability, liquidity, capital intensity , solvency And size company to aggressiveness tax on mining sector companies listed on the Indonesian Stock Exchange period 2015-2019. In this research the author used secondary data in get from site www.idx.co.id with amount Population Company Which reaching 49 companies in the mining sector listed on the Stock Exchange Indonesia. This research sample used purposive sampling and was selected of 21 sample companies according to certain criteria. Results of this research showing that profitability, liquidity, capital intensity, solvency and size the company has a significant influence on tax aggressiveness.
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Mouat, Jeremy. "Creating a New Staple: Capital, Technology, and Monopoly in British Columbia’s Resource Sector, 1901-1925". Victoria 1990 1, n.º 1 (9 de febrero de 2006): 215–37. http://dx.doi.org/10.7202/031017ar.
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Abstract This paper examines the mining industry of British Columbia, the province's leading staple during the period when the region was brought within the network of world trade. Specifically, it describes the emergence of zinc production as the most profitable sector of the industry, from the early 1900s through to the mid-1920s. A good deal of importance was attached to discovering some means of treating zinc ore in the early 1900s. Increasing amounts of zinc were being found in the silver-lead ore of eastern British Columbia. Zinc was seen as a contaminant, and smelters penalised mine-owners who shipped ore that was over 10 per cent zinc. The presence of zinc rendered relatively valuable ore (in terms of its silver and lead content) uneconomical. Concern over “the zinc problem” was such that, by 1905, the federal government, responding to the lobbying efforts of mine-owners, appointed a commission “to Investigate the Zinc Resources of British Columbia and the Conditions Affecting Their Exploitation”. During the next twenty years, mining companies in the Kootenays explored a number of different ways to overcome zinc's unfortunate impact upon the mining industry. These efforts to discover an adequate means to treat zinc ore illustrate the way in which technology and capital became the key ingredients of a distinctively new mining industry. The paper argues that the emergence of zinc mining reflected a fundamental restructuring of the industry, as the focus shifted from the discovery and exploitation of bonanza deposits of gold and silver to the less spectacular production of copper, lead, and zinc. Technology, economies of scale, and substantial capital investment were the hallmarks of the new industry. Not only was the industry profoundly altered — experiencing what other scholars have described as the second industrial revolution — but new vertically integrated companies displaced the traditional mining company. The paper describes the clearest example of this trend, outlining the early career of the Consolidated Mining and Smelting Company of Canada [Cominco], a subsidiary of the Canadian Pacific Railway. Cominco was able to put in place the necessary technology to tap its enormous lead-zinc deposit at Kimberley, and successfully treat zinc at its Trail refinery. Within two decades, and largely as a result of its ability to treat zinc, Cominco became the most profitable mining company ever to operate in British Columbia. The conclusion suggests some consequences of Cominco's ascendancy.
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Zheng, Yuxiang y Xiu Chen. "A Study on Brand Personality of Coastal Tourism Destinations: Text Mining Approach". Journal of Economic Science Research 5, n.º 2 (6 de julio de 2022): 18. http://dx.doi.org/10.30564/jesr.v5i2.4775.
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As the core element of the brand, brand personality is closely related to the personality of tourists. Unique and distinctive brand personality has become an important means for tourism destinations to enhance their core competitiveness. Through text analysis, the content of the online review content of three coastal tourist destinations in Yalong Bay, Silver Beach, and Gulangyu Islet were analyzed. The brand personality of coastal tourist destinations was identified from the perspective of tourist perception, and the selected 3 coastal tourist destinations were identified by correspondence analysis. Comparative analysis on a case-by-case basis.The research results show that the brand personality of coastal tourism destinations perceived by tourists is mainly concentrated in the two dimensions of “elegance” and “benevolence”, but different coastal tourism destinations have their own distinct and unique brand personalities. On this basis, directional suggestions for the development of brand personality in coastal tourism destinations are given.
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Paruki, Novia Rahmawati A. y Ahmad Ahmad. "Efektivitas Penegakan Hukum Tambang Ilegal". Batulis Civil Law Review 3, n.º 2 (26 de agosto de 2022): 177. http://dx.doi.org/10.47268/ballrev.v3i2.966.
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Indonesia is a country rich in mines, such as gold, silver, petroleum, mines, etc. Mining must be carried out by the government or the private sector. Every mining company is required to obtain a permit as regulated in Government Regulation Number 4 of 2009 concerning Mineral Mining in conjunction with Government Regulation Number 23 of 2010 concerning the Implementation of Mineral Mining. In fact, not all companies have a license. There are so many companies operating illegally. One of them is gold mining without a permit (illegal) in Tonala Village, Gorontalo Regency. The specification of this research is descriptive analytic. The method used is the normative as the primary approach and the juridical empirical method as the secondary approach. The data sources are secondary and primary. Data collection techniques used field studies with interviews for primary data and literature studies for secondary data. Then, the data were analyzed qualitatively in the form of qualitative descriptive.
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Talavera Cano, Andrés. "Bear Creek V. Peru and the Legality of the Investment as a (Implied) Requirement for the Investment Arbitration Tribunal’s Exercise of Jurisdiction". THEMIS Revista de Derecho, n.º 77 (21 de diciembre de 2020): 447–55. http://dx.doi.org/10.18800/themis.202001.024.
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Concerns about inconsistency in the application of standards in arbitral awards are strongly present in investment treaty arbitration. In particular, tribunals can regularly exercise a varying scope of jurisdiction when they determine the legality requirement that demands foreign investments to be made in accordance with the law of the host state.In this paper, the author seeks to analyze the decision rendered by the tribunal in Bear Creek v. Peru, in which the Canadian mining company alleged that the Peruvian State breach, inter alia, expropriation protections under the Canada-Peru Free Trade Agreement in relation to its investment in the silver mining project of Santa Ana. In order to achieve this aim, in the first chapter, he addresses three key issues regarding the tribunal’s jurisdiction, the rights on which the company based its claim and the arguably prerequisite of legality or good faith for the tribunal’s exercise of jurisdiction. In the second chapter, he analyzes the validity of the tribunal’s interpretation on the legality requirement for investment as an implicit element in the relevant treaty to determine the tribunal’s jurisdiction.
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Hauptmann, Andreas, Gabi Schneider y Christoph Bartels. "The Shipwreck of Bom Jesus, AD 1533: Fugger Copper in Namibia". Journal of African Archaeology 14, n.º 2 (12 de enero de 2016): 184–207. http://dx.doi.org/10.3213/2191-5784-10288.
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In AD 1533, the Portuguese trade vessel Bom Jesus sunk off the coast of southern Namibia, near the modern town of Oranjemund. Coming from Lisbon on its way to western India, it contained a multifold load of naval equipment and commodities for trade and exchange. Amongst the excavated materials recovered from the presumed shipwreck of the Bom Jesus, of paramount importance are 1845 copper ingots, showing the trademark of the Fugger company from the Freie Reichsstadt of Augsburg, Germany. Historical accounts testify to massive copper and silver production of the Fugger-Thurzo company in the area of Neusohl in the Slovak Ore Mountains. Geochemical analyses of 60 copper ingots from the wreck show an extraordinarily homogeneous composition with appreciable concentrations of lead, silver, antimony, nickel, and arsenic indicating the smelting of fahlores. Lead was found to be added deliberately to the copper to extract silver by the Liquation Process. This technological innovation is one of the numerous hallmarks of the Renaissance period and the “Age of Discovery”. Lead isotope abundance ratios point to an origin from lead deposits in Cracow-Silesia. The ore districts of Neusohl and Cracow-Silesia were intensively connected to mining and metal production during the postmedieval period. This study forcefully shows the advantage of combined historical and natural science studies.
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Salea, Theofilus y Irfan Ido. "Evaluasi Program CSR (Corporate Social Responsibility) Perusahaan PT. ANTAM Tbk UBPN SULTRA Kecamatan Pomalaa Kabupaten Kolaka (Studi Kasus Desa Tambea)". Journal Publicuho 2, n.º 1 (22 de abril de 2019): 51. http://dx.doi.org/10.35817/jpu.v2i1.6050.
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ABSTRACTTPT. ANTAM Tbk is a company engaged in the exploration of mining materials such as nickel, gold and silver, and bauxite. Tambea village is one of the areas in Pomalaa Subdistrict, Kolaka Regency, which is close to PT. ANTAM Tbk. The purpose of this study can evaluate the CSR program of PT. ANTAM Tbk in Tambea Village, Pomalaa District, Kolaka Regency. The method of determining the sample uses the System of Rising Intensification method with a population of 24 heads of households as respondents. The analytical method used to determine the relationship between the level of performance and level of expectation is the method of IPA analysis (Importance-Performance Analysis). The results of this study indicate that the company PT. ANTAM Tbk still has to improve its performance on the elements of program distribution and supporting elements of the program. Keywords: Evaluation, CSR Program and company PT. ANTAM Tbk.
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Winarko, Agus y Zulkifli Djunaidi. "ANALYSIS OF ACCIDENT DATA AT PT X FOR THE 2018-2022 PERIOD USING THE HFACS-MINING INDUSTRY FRAMEWORK METHOD". Jurnal Ilmiah Manajemen, Ekonomi, & Akuntansi (MEA) 8, n.º 2 (10 de mayo de 2024): 130–45. http://dx.doi.org/10.31955/mea.v8i2.3990.
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The mining industry is a high-risk industrial activity. Human factors have been identified as the most common cause of major accidents in the mining industry. The Incident Management System of PT X, which is a company in exploration, mining, processing, and marketing sector of copper, gold and silver concentrate, part of the state-owned mining holding enterprise Mining Industry Indonesia, documented 322 cases of accidents within the 2018-2022 period. This research aims to analyze accident data at PT X using the Human Factor Analysis and Classification System-Mining Industry (HFACS-MI) framework. Methods. This research collected qualitative data for 322 accident cases at PT X in 2018-2022 from the incident management system database categorized as recordable injuries. Factors causing the accident were coded using the HFACS-MI framework. Accident data analysis used descriptive statistics. Results. The study findings revealed that 84% of all accidents involved contractor workers and 16% involved permanent workers at PT X. The results of the analysis using the HFACS-MI framework showed that each layer or level contributes to accidents, namely external factors by 44%, organizational influence by 68%, unsafe leadership by 90%, preconditions for unsafe acts by 99%, and unsafe acts by 99.7%. Conclusion. These findings emphasize the need to reduce the number of human errors during mining operations to reduce the current accident trend. The HFACS-MI framework has proven to be a valuable tool for robust accident analysis of human factors in mining.
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García-Carrillo, Cristina, José Parga-Torres, Héctor Moreno-Casillas y Francisco S. Sellschopp-Sanchez. "Kinetics and Energy Consumption for a Three-Stage Electrocoagulation Process for the Recovery of Au and Ag from Cyanide Leachates". Metals 9, n.º 7 (5 de julio de 2019): 758. http://dx.doi.org/10.3390/met9070758.
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The most common processes used for the recovery of gold and silver from cyanide leachates are Merril-Crowe, activated carbon in pulp, and ion exchange resins; the process of electrocoagulation (EC) also is a promising new technique. EC is an electrochemical process whose mechanisms include oxidation, reduction, decomposition, deposition, coagulation, absorption, flotation, and precipitation. It has been used for the treatment of water and wastewater with different degrees of success. This study aimed to determine the kinetics of the reaction and the energy consumption at constant voltage, and at constant current using aluminum electrodes with two different distances between electrodes. EC was run in three stages for the removal of gold and silver from aqueous cyanide solutions from samples supplied by a Mexican mining company. Characterization of the sample showed initial concentrations of 49.48 and 383 mg/L of gold and silver, respectively. Results showed the effectiveness of the process by achieving removals up to 98.59% of gold and 99.43% of silver. Additionally, it was determined that the kinetics of the reaction is of zero order and that the lowest energy consumption can be achieved when working at constant voltage and with a separation of 0.8 cm between electrodes.
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Wittwer, Paul D. "Epithermal Precious Metal Deposits in South Korea—History and Pursuit". SEG Discovery, n.º 125 (1 de abril de 2021): 19–26. http://dx.doi.org/10.5382/segnews.2021-125.fea-01.
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Abstract The gold and silver endowment of Korea has historically been well known, with records alluding to production as far back as 1122 BC. The main gold production period was from 1925 to 1943 during the Japanese occupation of Korea, with more than 1 Moz recorded in 1939. Muguk was the most productive gold mining operation, located within the central region of South Korea, with a recorded 590 koz of gold produced from 1934 to 1998 (first mined in AD 912). The majority of the historical mining operations were closed by government order in 1943 during the Second World War and never reopened. A number of small mines operated between 1971 and 1998, with limited production during a period of gold prices generally lower than at present (~25–50% of current inflation adjusted prices, apart from a four-year period 1979–83). It is likely that significant resources remain within these historical mining areas. Gold-silver deposit types historically recognized and exploited in Korea include placers and orogenic and intrusion-related vein systems. Only more recently have epithermal vein and breccia systems been recognized. This is not surprising, given that the geologic and tectonic setting of the Southern Korean peninsula is prospective for epithermal precious metal deposits, spatially associated with basin-scale brittle fault systems in Cretaceous volcanic terranes. South Korea is an underexplored jurisdiction, with limited modern exploration and drilling until the mid-1990s, when Ivanhoe Mines Ltd. discovered the Gasado, Eunsan, and Moisan epithermal gold-silver deposits, all of which became mines. Exploration was limited for another 20 years until Southern Gold Ltd., an Australian Securities Exchange (ASX)-listed company, commenced regional-scale exploration for epithermal deposits, using a strategy similar to that successfully employed by Ivanhoe.
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Fuadiya, Sinta Luluk y Endang Pudji Widjajati. "Analysis of sag mill machine performance using overall equipment effectiveness and failure model and effects analysis method". International Journal of Industrial Optimization 3, n.º 2 (30 de diciembre de 2022): 141–53. http://dx.doi.org/10.12928/ijio.v3i2.6701.
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The mining company uses a variety of grinding machines to process minerals, whereas the most common type of machine is the Semi-Autogenous Grinding SAG Mill machine. This machine is employed for the mining process of hard rock as raw material into gold, copper, and silver. However, the SAG Mill machines are often broken, even suddenly not working, with an average loss time of 97.30 hours which impacts a decrease in efficiency and production quality of up to 40%. It can cause losses that do not reach the production target. This research aims to measure the effectiveness of the SAG Mill machine and determine the failure using the OEE and FMEA methods. The results showed that the SAG Mill machine is still under standardized based on the Japan Institute of Plant Maintenance (JIPM), which is 85%. The FMEA method and RPN value apply to analyze downtime losses, and idling is the loss that highly affects the effectiveness of SAG Mill machines. Recommendations for the company are to increase the number of equipment that aims to prolong the machine's age and accelerate production. This research contributes to another solution to help maintenance managers by measuring the effectiveness and determining the failure of the SAG Mill machine
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Masloboev, Vladimir, Sergey Seleznev, Anton Svetlov y Dmitriy Makarov. "Hydrometallurgical Processing of Low-Grade Sulfide Ore and Mine Waste in the Arctic Regions: Perspectives and Challenges". Minerals 8, n.º 10 (7 de octubre de 2018): 436. http://dx.doi.org/10.3390/min8100436.
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The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and processing technologies for heap leaching intensification in severe climatic conditions. The paper presents perspectives for heap leaching of sulfide and mixed ores from the Udokan (Russia) and Talvivaara (Finland) deposits, as well as technogenic waste dumps, namely, the Allarechensky Deposit Dumps (Russia). The paper also shows the laboratory results of non-ferrous metals leaching from low-grade copper-nickel ores of the Monchepluton area, and from tailings of JSC Kola Mining and Metallurgical Company.
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Yudhistyra, Wecka Imam, Evri Marta Risal, I.-soon Raungratanaamporn y Vatanavongs Ratanavaraha. "Using Big Data Analytics for Decision Making: Analyzing Customer Behavior using Association Rule Mining in a Gold, Silver, and Precious Metal Trading Company in Indonesia". International Journal on Data Science 1, n.º 2 (8 de junio de 2020): 57–71. http://dx.doi.org/10.18517/ijods.1.2.57-71.2020.
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Indonesia is facing many challenges in the fourth industrial revolution (4IR) era. One of them is related to big data technologies and implementation that can be seen clearly from Indonesia Industry Readiness Index (INI) 4.0. Therefore, focusing on implementing big data analytics in a gold, silver, and precious metal trading company is the objective of this manuscript to support daily business operations. To be more specific, the aim is to discover meaningful patterns and ensure high quality of knowledge discovery from the big data available in a company in Indonesia. It is needed to support the Making Indonesia 4.0 as a roadmap to implement industrial digitalization in Indonesia. The methodology used for the big data implementation in this manuscript is the combination of the CRISP-DM framework and key steps for customer analytics. The result of this research is a list of recommendations that facilitate strategic planning based on evidence of measurable big data analytics to achieve the business goals of a company.
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Parhusip, Masjon, Eddy Winarno y Edy Nursanto. "Implementasi Investasi Sosial Sektor Industri Pertambangan". COMSERVA Indonesian Jurnal of Community Services and Development 2, n.º 6 (4 de octubre de 2022): 497–509. http://dx.doi.org/10.59141/comserva.v2i6.354.
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PT Freeport Indonesia is a mining company which includes mining, processing and exploration of ore containing copper, gold and silver. PT Freeport Indonesia operates in the highlands of Mimika Regency, Papua Province, Indonesia. PT Freeport Indonesia is committed to providing benefits to the community around the operational area, these benefits are realized through various social investment activities carried out with partners. This study aims to provide an overview of PT Freeport Indonesia's commitment in implementing community development and empowerment that has been going on for the last three years. The research method is carried out using qualitative methods in general, describing a research to be simpler and subjective. Data processing was carried out by studying literature using data from the social investment annual report of PT Freeport Indonesia. The results of this study provide a general description of PT Freeport Indonesia's commitment to implementing community development and empowerment in the operational are.
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Parsons, Richard. "Copper King Mining Company: A Case Study In Using Loans And Equity To Finance A Start-Up". Journal of Business Case Studies (JBCS) 12, n.º 1 (14 de enero de 2016): 19. http://dx.doi.org/10.19030/jbcs.v12i1.9559.
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The proposed Copper King mine in south central Utah was expected to produce millions of dollars in copper, gold and silver. A nearby struggling town and thousands of speculators and large banks seized upon this promise. They all were willing to invest in developing the mine. Copper King tried a wide variety of financing approaches, one at a time, over a several year period during which a significant amount of funds were raised. The financing options employed allow a study of the technical financing requirements of each of the options (hard money loans, waterfall loans, private equity and public equity). Copper King Mining Company is a lesson in the difficulties of financing a start-up. Important theoretical concepts include the problem of banks dealing with asymmetric information and moral hazard, along with the tools they use to mitigate that risk. Asset valuation and the price of risk are also important lessons in this case.This case is most appropriate for classes in corporate finance, money and banking, investing and entrepreneurship.
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Vargas-Hernández, José G. "Cooperación y conflicto entre empresas, comunidades, nuevos movimientos sociales y el papel del gobierno. El caso de cerro de San Pedro (México)". HiSTOReLo. Revista de Historia Regional y Local 1, n.º 2 (1 de julio de 2009): 86–135. http://dx.doi.org/10.15446/historelo.v1n2.11579.
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El objetivo de este trabajo es analizar las relaciones de cooperación y conflicto entre la Compañía Minera (MSX) y las comunidades de San Pedro, Soledad y San Luis Potosí, los Nuevos Movimientos Sociales y los tres niveles de gobierno involucrados. La compañía Minera inició operaciones en una mina a cielo abierto de oro y plata con el apoyo de oficiales de los gobiernos locales, estatales y federal. Los habitantes de estas comunidades apoyados por grupos ambientalistas y Organizaciones No Gubernamentales argumentan que el proyecto contamina las fuentes de agua fresca, además de perturbar el medio ambiente y la ecología de la región. En tal sentido el artículo analiza el impacto, la interacción social y de conflicto entre los distintos actores desde una perspectiva local y socio-ambiental, previa contextualización histórica de subregión y el desarrollo de la industria minera.Palabras clave: Cerro de San Pedro, comunidad, conflicto, empresa, gobierno, medio ambiente.Cooperation and conflict among companies, communities, new social movements, and the role of the government. The case of Cerro de San Pedro AbstractThe objective of this work is to analyze the relationships of cooperation and conflict among the mining company MSX; the communities of San Pedro, Soledad, and San Luis Potosí; the new social movements; and the three levels of government involved. The mining company began operations in a gold and silver open-pit mine with the support of officials from the local, state, and federal governments. The inhabitants of these communities, backed by environmental groups and non-government organizations argued that the project contaminated sources of fresh water, while also perturbing the environment and the region’s ecology. In this manner the article analyzes the impact, the social interaction, and the conflict among the distinct actors from a local and social-environmental perspective, after the historical contextualization of the subregion and the development of the mining industry is presented. Keywords: Cerro de San Pedro, community, conflict, company, government, environment
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Pamungkas, Darmadi Prapto. "EFEKTIVITAS PENYIDIKAN TINDAK PIDANA PENAMBANGAN EMAS TANPA IZIN DI KABUPATEN SOLOK SELATAN (Studi pada Direktorat Reserse Kriminal Khusus Kepolisian Daerah Sumatera Barat)". UNES Law Review 1, n.º 2 (26 de diciembre de 2018): 134–47. http://dx.doi.org/10.31933/law.v1i2.22.
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Indonesia is the rich country of mine, such as gold, silver, petroleum, mine, etc. Management of mine should be done by government or private. Every mining company obligated to get license as regulated in the Regulation Number 4 Year 2009 about Mineral Mining Juncto the Government Regulation Number 23 Year 2010 about the Implementation of Mineral Mining. In fact, not all companies have license. There are so many companies operate illegal. One of them is gold mining without license (PETI). The specification of the research is descriptive analytic. The methods used are normative as primary approach and juridical empiric method as secondary approach. The sources of data are secondary and primary. The techniques of collecting data uses field study by interviewing for the primary data and library study for the secondary data. Then, the data analyzed qualitatively in descriptive qualitative form. From the research results obtained several conclusions: First, the effective of investigation gold mining without license by Directory of Reserve Special Criminal of West Sumatera Police based on the data got can be seen clearly effective because from 3 (three) cases all has been investigation and submitted to Court. Second, the obstacles faced by Directory of Reserve Special Criminal of West Sumatera Police in executing of gold mining without license (PETI) in South Solok Regency consist of: (a) no synergy in supporting the law enforcement together between instances and other because the agents of gold mining without license (PETI) are backed up by law enforcer, government until traditional viewers; and (b) limited tool such as no double garden cars or boat to reach field and no communication satellite which can be operated in the unreached location by phone signal.
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Sadagat Ibragimova, Sadagat Ibragimova. "SIGNIFICANCE OF THE METALLURGICAL INDUSTRY OF AZERBAIJAN IN THE NON-OIL SECTOR, THE ROLE OF AZERGOLD CJSC IN THE ECONOMY OF THE REPUBLIC". PIRETC-Proceeding of The International Research Education & Training Centre 16, n.º 06 (10 de noviembre de 2021): 63–70. http://dx.doi.org/10.36962/piretc1606202163.
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Geological surveys carried out by the Closed Joint Stock Company (CJSC) AzerGold for the exploration of new deposits and expansion of production areas are giving positive results. For an effective assessment of reserves at the fields, AzerGold CJSC conducts intensive exploration work and drills deep wells in these fields. Since 2017, AzerGold CJSC has been mining Chovdar, Agyokhush, Tulallar, Marakh, Filizchay etc others and Jayirchay gold, as well as it carries out various works on fine metal deposits. The latest financial indicators of AzerGold CJSC give reason to say that it is a stable company. It is expected that AzerGold CJSC will react faster to the growth rates in the world markets due to the work carried out at new gold deposits and efficient use of resources. The net profit of a Closed Joint Stock Company has been growing at a higher rate over the years. AzerGold CJSC produces ingots and coins from Azerbaijani gold and silver in various historical designs. Bars and coins are currently sold in stores owned by Italdizain Group, Levata Group and SI Luxury World, which have a long history of selling premium goods. AzerGold CJSC will soon become better known in the local and international markets as a gold producer of the country. AzerGold CJSC issues bonds, increases the company's technological capabilities for gold production and strengthens production in order to bring more gold to the world market. Recent financial indicators of AzerGold CJSC give grounds to say that it is a stable company. The company's revenue, net profit and total capital of the company in 2019 increased several times compared to 2018. Keywords: AzerGold CJSC, geological exploration works, drilling works, production works, efficiency.
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Leeuwen, Theo van. "Mineral Exploration and Mining in Sumatra, Indonesia—A Historical Overview". SEG Discovery, n.º 129 (1 de abril de 2022): 21–29. http://dx.doi.org/10.5382/segnews.2022-129.fea-01.
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Abstract Sumatra, Indonesia, has a long and checkered history of mineral exploration and mining that dates back to prehistoric times. These activities have been dominated by gold, involving both the local population and mostly foreign companies. The first documented mining activity was the reopening of the ancient silver-rich Salida gold mine in West Sumatra in 1669 by the VOC (Vereenigde Oost-Indische Compagnie), a Dutch trading company that for two centuries monopolized trade between Europe and Asia. The government of the Netherlands East Indies initiated geologic investigations and mineral exploration in 1850, and private industry followed 30 years later. Between 1899 and 1940, 14 gold mines were developed, most of which were short-lived and uneconomic. Total production between 1899 and 1940 was 101 t Au and 1.2 Mt Ag. During the Japanese occupation, in its aftermath, and for the first 20 years of Indonesia’s independence, there was very little activity. In 1967, introduction of new foreign investment and mining laws by the New Order government heralded a new era of exploration and mining activity that continues to the present day. Since 1967, there have been several peaks in exploration activity, viz. 1969 to 1973 (porphyry copper), 1985 to 1990 (gold), 1995 to 1999 (gold), and 2006 to 2010 (multi-commodity). A variety of previously unknown mineralization types were discovered, including porphyry Cu, high-sulfidation Au, sediment-hosted Au, and sediment-hosted Pb-Zn. Activity during the modern area has included the reopening of one of the old Dutch mines, development of four new gold discoveries including the giant Martabe district (310 t Au), and exploitation of several small Fe skarn deposits known from the Dutch time. By world standards, to this day Sumatra remains underexplored.
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Krymsky, V. V., E. V. Litvinova y J. G. Mingazheva. "Electropulse Processing of Gold-Bearing Ore". Materials Science Forum 870 (septiembre de 2016): 568–72. http://dx.doi.org/10.4028/www.scientific.net/msf.870.568.
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Experimental results for nanosecond electromagnetic impulses (NEMI) impact on precious metals leaching process from sulphidic ores are presented. A possibility of an intensification of leaching process of Au, Ag, Cu is established. The extraction of silver increases by 70 %, gold – by 40 %. The samples of sulphidic ores from the pit of JSC NPF "Bashkir gold mining company" are taken as objects of research. The use of economic electronic generators is suggested herein. They create impulses of 1 nanosecond, the front of 0.1 nanoseconds, amplitude of 6-15 kV impulses, 1 kHz frequency of repetition, consumed power from an electric network is less than 100 W. Energy in one impulse is 10–3 J. The pulse field changes the valence of metals of impurity towards decrease. It changes the current of chemical reactions in a mineral matrix. The local heating of the precious metals interspersed particles and destruction of a mineral matrix are also possible.
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Istiqomah, E., R. Aryanto y T. T. Purwiyono. "Mitigation in erosion control and management of ex-mining water through revegetation and sustainable environmental management technologies". IOP Conference Series: Earth and Environmental Science 882, n.º 1 (1 de noviembre de 2021): 012043. http://dx.doi.org/10.1088/1755-1315/882/1/012043.
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Abstract In the open-pit mining system that is being carried out by a company in the mining sector with gold and silver commodities, PT Citra Palu Minerals, land clearing can cause soil erosion which can lead to soil sedimentation, increased turbidity of water that will be released into the environment and potential entry soil eroded into the tailings pond at the Dry Tailing Management Facility (DTMF). Therefore, further action is needed to control erosion and sedimentation as well as water management so that the water to be released into the environment is following environmental quality standards that have been set by the government. Before determining and controlling erosion, it is necessary to know the rate of erosion that occurs at the research location, in this study the USLE (Universal Soil Loss Equation) method was used to predict the rate of erosion with the results obtained, namely 17.07 tonnes/ha on the North DTMF slopes and 21.04 tonnes/ha for DTMF South slopes. To reduce the rate of erosion, it is necessary to control erosion by revegetation of the land, create a water drainage system to the sedimentation pond and treat the collected water using biophytoremediation of land with the use of chemicals to accelerate the deposition process, constructed swamp forest to the latest sustainable technology recommended by the Indonesian Academy of Sciences (LIPI).
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ΔΗΜΟΥ, Ε. "The alogenide minerals atacamite, iodargyrite in the epithermal gold mineralization of Profitis Ilias Milos island and their importance". Bulletin of the Geological Society of Greece 34, n.º 3 (1 de enero de 2001): 835. http://dx.doi.org/10.12681/bgsg.17089.
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The present work refers to the mineralogical study of samples from borehole cores drilled in Profitis Ilias area at Milos island by the company "MIDAS" S.A., subsidiary of "Silver& Baryte Ores Mining Co" S.A., within the frames of the exploration for epithermal gold and silver. Intensely hydrothermally altered pyroclastic rocks of rhyodacitic composition occur in the area, transformed in a group of secondary minerals as alunite, jarosite, dickite, kaolinite, chrystobalite, chalcedony, adularla, quartz. Several quartz veins rich in barite and occasionally alunite traverse these rocks. The mineralization, located mainly into the quartz veins, is poor in metallic mineral proportion and consists of a few grains of hematite, pyrite, galena, chalcopyrite, bornite, chalcocine, tetraedrite, native gold, electrum, copper. Gold and silver of the order of 20ppm and 1300ppm respectively were observed in some core samples from boreholes of small depth (from 18 up to 21 m.). Initially, the exploration has been focused on the research for silver bearing minerals, taking also into consideration that high silver grades could not be explained by the restricted presence of electrum. However, the investigation proved that the high silver proportion derives from two rare silver alogenides minerals, Iodargyrite (Agi) and Chlorargyrite (AgCl), located into the cavities of the quartz veins or into fully altered-eroded voids of host rocks. These two alogenides present similar mineralogical properties and thus their identification was based mainly on the microanalyses. Moreover, Atakamite Cu2(OH)3Cl another alogenide mineral of emerald-green colour, has been found into the same samples. Its presence indicated increased grades in copper, since the metallic minerals of copper are almost absent. The presence of these alogenide minerals exclusively into cavities and the significant presence of alogene element iodine, suggest deposition, where the seawater (mixed or not with hydrothermal solutions) has played an important role. After the seawater intrusion into various formations (metamorphic basement, volcanic rocks) a high temperature are acquired, as well as enrichment in valuable metals (Au, Ag, Cu) which are deposited during its ascend in higher levels, mainly in form of alogenides. These rare alogenides display significant data on the general mineralization of the area and a different processing-recovery way of the valuable metals occurring into the epithermal mineralization.
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Nikoyan, Anas, La Ode Alwi y Yasnoni Yasnoni. "ANALISIS KINERJA PEMBERDAYAAN MASYARAKAT DALAM PROGRAM CORPORATE SOCIAL RESPONSIBILITY". Jurnal Sosial Ekonomi Pertanian 15, n.º 2 (25 de junio de 2019): 173. http://dx.doi.org/10.20956/jsep.v15i2.6443.
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ABSTRAKPT. ANTAM Tbk UBPN SULTRA merupakan perusahaan yang bergerak dalam bidang eksplorasi bahan-bahan tambang seperti nikel, emas dan perak, serta bauksit.Desa Hakatutobu merupakan salah satu wilayah yang terdapat di Kecamatan Pomalaa Kabupaten Kolaka yang berada dekat dengan PT. ANTAM Tbk UBPN SULTRA. Tujuan dari penelitian ini adalah untuk mengetahui kinerja pemberdayaan masyarakat dalam program corporate social responsibility (CSR). penelitian ini menggunakan metode Sample Random Sampling denganpengambilan sampel secara acak,dengan populasinya adalah masyarakat Desa Hakatutobu yang berada dikawasan binaan perusahaan PT. ANTAM Tbk UBPN SULTRA yang berjumlah 303 kepala keluarga (KK). Penentuan sampel dilakukan menggunakan teknik probability sampling dengan mengambil batas toleransi kesalahan 10% dari jumlah populasi yaitu 75 KK sebagai responden penelitian.Metode analisis yang digunakan untuk memetekan hubungan antara tingkat kinerja dan tingkat kepentingan yaitu metode analisis IPA (Importance Performance Analysis). Hasil penelitian ini menunjukkan bahwa perusahaan PT. ANTAM Tbk UBPN SULTRA melaksanakan kinerja pemberdayaan masyarakat dalam program CSR sudah sangat baik.Dengan adanya pemberdayaan masyarakat ini ,diharapkan agar perusahaan terus memberikan keterampilan kepada masyarakat desa dengan lebih baik,menempatkan masyarakat menjadi proaktif dalam menentukan arah kemajuan. Kata Kunci: Kinerja perusahaan, Pemberdayaan Masyarakat, Program CSR dan perusahaan PT. ANTAM Tbk UBPN SULTRA ABSTRACTPT. ANTAM Tbk UBPN SULTRA is a company engaged in the field of exploration of mining materials such as nickel, gold and silver, and bauxite. Hakatutobu Village is one of the areas found in Pomalaa District, Kolaka Regency, which is close to PT. ANTAM Tbk UBPN SULRTA. Thepurpose of this research is to know the performance empowerment of society in Corporate Social Responsibility (CSR) program. In this research use method Sample Random Sampling with taking sample in a manner random, with population of society in theHakatutobu village is located inarea guided company PT.ANTAM Tbk UBPN SULTRA, which amounts to 303 head family (KK). Determination of the sample use probability sampling technique and take the limit tolerances of the error are 10% from total population 75 household as respondent research.The analytical method used to determine the relationship between performance levels and importance levels is the Importance Performance Analysis method. The result of this research indicates that company PT. ANTAM Tbk UBPN SULTRA implemented empowerment society in program CSR is very good. Presences of empowerment society expected that company can give skills to society better. Make society to be proactive in determine direction progress. Keywords: Performance Company, Empowerment Community, CSR and Company Programs PT. ANTAM Tbk UBPN SULTRA.
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Fauzi, Febrian Adri Nur, Rukun Santoso y Di Asih I. Maruddani. "Pemodelan Data Time Series Menggunakan Pendekatan Regresi Polinomial Lokal Pada Data Harga Saham MDKA". Indonesian Journal of Applied Statistics 6, n.º 2 (16 de abril de 2024): 186. http://dx.doi.org/10.13057/ijas.v6i2.80118.
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<p class="AbstractEnglish">Investment is an important way to manage finances for profit. One of the most popular investments in Indonesia is buying and selling shares. In addition to getting profits, they also have risks. Therefore, analyzing stock prices before buying and selling is an important key in stock investing. Investors should buy stocks at a low price and sell them at a high price. One of the methods used is parametric regression analysis, but it has assumptions that must be met. A more flexible alternative is local polynomial regression without any particular assumptions. PT Merdeka Copper Gold Tbk with MDKA stock code is a company engaged in the mining and industrialization of gold, silver, and other associated minerals. The study of modeling the lowest daily price of MDKA shares using local polynomial regression showed excellent results. The high coefficient of determination exceeding 67% on the in-sample data indicates strong model performance, and the Mean Absolute Percentage Error (MAPE) value on the out-of-sample data is less than 10%, ensuring excellent model accuracy.</p><p class="AbstractEnglish"><strong>Keywords: </strong>local polynomial regression; MDKA shares; time series</p>
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Aviles Conesa, Ángel David y Mauricio Genet Guzmán Chávez. "Más de un Wirikuta pero menos de dos: Geopolítica versus cosmopolítica como estrategia de resistencia". Revista Murciana de Antropología, n.º 29 (20 de diciembre de 2022): 47–68. http://dx.doi.org/10.6018/rmu.521511.
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We propose a look at the socio-environmental conflict in the Sacred Natural Site of Wirikuta (SSNW), in the semi-arid zone of northern Mexico, caused by the mining exploitation project carried out by the Canadian company First Majestic Silver Corp. El Frente of Defense of Wirikuta (FDW), a social movement against this project, obtained the precautionary suspension of the mining concessions. This movement and the resistance it produced became a particularly symbolic and significant emblem of social resistance in Mexico and Latin America. The analysis we propose pays attention to the changes promoted in the general context of neoliberal policies that have given way to flexible national legislation on investment and looting of natural resources that has an effect that transforms the territories. This transformation will allow certain uses of the resources and sanction others depending on the actors who implant the meanings in the territories. The premise that weaves the discussion and leads us to an appreciation of what has been learned in this case refers to the importance of the sacred as a discursive and practical element for the defense of the territory. To delimit the proposed theme, we will carry out a deductive tour of the transformation processes of the territory, beginning extensively in Latin America, Mexico and finally to the specific threat in Wirikuta as contexts of relational action. En este artículo proponemos una mirada del conflicto socioambiental en el Sitio Sagrado Natural de Wirikuta (SSNW), en la zona semiárida del norte de México, originado por el proyecto de explotación minera que llevaría a cabo la empresa canadiense First Majestic Silver Corp. El Frente de Defensa de Wirikuta (FDW), movimiento social en contra de este proyecto, logró la suspensión cautelar de las concesiones mineras. Este movimiento y las resistencias que produjeron se constituyó como un emblema especialmente simbólico y significativo de las resistencias sociales en México y en América Latina. El análisis que proponemos presta atención a los cambios promovidos en el contexto general de las políticas neoliberales que han dado paso a legislaciones nacionales flexibles en materia de inversión y saqueo de los recursos naturales que tiene un efecto que transforma los territorios. Esta transformación va a permitir determinados usos de los recursos y a sancionar otros en función de los actores que implanten los significados a los territorios. La premisa que urde la discusión y nos conduce a una apreciación de lo aprendido en este caso remite a la importancia de lo sagrado como elemento discursivo y práctico para defensa del territorio. Para acotar la temática propuesta realizaremos un recorrido deductivo de los procesos de transformación del territorio comenzando de modo extensivo en América Latina, México y finalmente a la amenaza concreta en Wirikuta como contextos de acción relacionales.
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KAUNG, Pyae, Andrey SEMIKIN, Albert KHAYRUTDINOV y Andrei DEKHTYARENKO. "Recycling of industrial waste is a paradigm of resource provision for sustainable development". Sustainable Development of Mountain Territories 15, n.º 2 (30 de junio de 2023): 385–97. http://dx.doi.org/10.21177/1998-4502-2023-15-2-385-397.
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Introduction. In an era of economic transnationalisation, global shocks have a significant impact on economic subjects. Resource-dependent countries and economies are particularly sensitive to global shocks. There are common parallel between countries dependent on imported resources and regions with mineral resources on the verge of depletion. Recycling of industrial waste is a vector of mining development that reduces the dependence of economies on sharp fluctuations in commodity markets in times of global shocks. The proposed vector allows solving replenishment of the mineral resource base of the enterprise or countries dependent on the import of resources. The development of innovative technologies from simple minerals extraction from the subsoil to a full-cycle process of georesources exploitation, including full processing of industrial waste, will contribute to resource provision for sustainable development. Purpose of work. To identify industrial deposits, study and systematise their chemical and mineralogical composition and determine their recycling potential for the further recycling of industrial waste from mining and processing sectors. Methods and materials. The object of the study is industrial formations (tailing dump) which are part of a single mining holding Ural Mining and Metallurgical Company of Gayskaya, Sibayskaya, Uchalinskaya and Buribayevskaya plants. The laboratory and experimental part of the study was facilitated by various methods: theoretical (analysis, generalisation; classification, etc.); practical (observation; comparison; measurement; experiment, etc.). The study of tailings was carried out by simple sampling according to a preformed grid of pits. The pits were made on the tailing beaches (drained areas) on a 60x60 meter grid to a depth of 6 meters. The study comprised an assessment and visual approbation which consisted of interval-by-interval sampling of flotation tailings (test material) from the pits at each half-metre interval. To reduce the volume of test material, samples were averaged by simple quartering. Selected samples were sent to the laboratory for physical examination. The samples were examined by X-ray analysis. A DRON-3M instrument was used to analyze the samples. The study was conducted by Co-radiation with the use of Fe-filter. X-ray phase analysis was used to process the obtained spectral data where the Joint Committee on Powder Diffraction Standards (JCPDS) was applied. Microstructural research of the averaged sample mineralogy was conducted on material with a particle size of -1+0.25 mm using a Philips SEM 515 scanning electron microscope. The possibility of extracting a valuable component from tailings was assessed on the example of gold using double agitation cyanidation. Results of research. The results of the visual study show that horizontally layered structure is traced in all tailing dumps of all pits. This is due to the successive reclamation of the layers. At all the tailing dumps of the holding, industrial sulfates were found in all pits without exception. An active process of sulfate formation is observed down to a depth of 1-2 m. Laboratory tests have shown the percentage of valuable component content: copper; zinc; iron; sulphur; gold and silver, which make it possible to determine the approximate amount of useful components that are in industrial formations and are suitable for extraction. In order to fully characterize the industrial raw material, the qualitative indicator of valuable components was established, namely the possibility of their extraction was investigated (on the example of gold). The laboratory method established that the extraction of gold from tailings varies from 75,9 to 82,14% and depends on the investigated industrial raw material. Discussion. Analysis of the data obtained indicates that 50.88% of the gold in the flotation tailings of the Gaiskiy processing plant is in refractory form. No free gold has been identified for extraction. The results of phase analysis confirmed the presence of easily-cyanidable gold in the mineral assemblages. The easily-cyanideable gold is 49.12 % from the total volume of gold in the examined processing waste. The samples of laboratory analysis taken from the Buribayevskiy processing plant show that less than half of the gold in the industrial storage is in the refractory form (40.31 %). Also, free gold for extraction has not been identified. The easi-ly-cyanideable gold is 59.7 % from the total volume of gold in the investigated waste of the Buribayevsk processing plant. Conclusion. 1. The article examines the tailing dumps of the Ural Mining and Metallurgical Company and determines their material and mineralogical composition. The tailing dumps are united by the same type of processed material and, consequently, by a similar processing technology. 2. An approximate estimate of the valuable components left in industrial waste has been made. 3. It has been proven that industrial waste can be recycled to resource provision for sustainable development. 4. Industrial formations need to be studied in more detail in order to determine the distribution pattern of valuable components in the industrial mass and to investigate their extraction potential in more detail. Results. 1. Testing performed on industrial formations (tailing dumps) of the Southern Urals and laboratory studies of samples confirm the prospects of using industrial waste in recycling to extract the left valuable component. 2. The development, justification, and implementation of innovative technologies for the processing of low-value industrial raw materials is the basis for starting the manufactured exploitation of industrial accumulations. 3. The next stage in the study of industrial mass is a more thorough study of industrial accumulations and the identification of patterns in the distribution of valuable components throughout the mass (contouring) and a more detailed study of the possibility of their additional extraction.
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Moussaoui, Raja. "Lead Production in Morocco at the Zellidja Lead Smelter Company". International Journal of Current Science Research and Review 05, n.º 11 (18 de noviembre de 2022). http://dx.doi.org/10.47191/ijcsrr/v5-i11-23.
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The subsoil of Morocco is marked by a wealth of mineral resources (phosphate, lead, zinc, coal and others). For this reason, the mining sector is still considered one of the main pillars of the national economy. The Moroccan lead deposits are located mainly in the Atlas region and the Eastern region. The Zellidja lead smelter company has succeeded in distinguishing itself and being among the best lead smelters in Morocco. It is known nationally and internationally for its production of soft lead, antimonial lead oxide, fine silver, copper matte and triple alloy concentrate. The majority of its production is destined for international markets such as Europe, North Africa, Near East and Middle East. In addition, it is also recognized for its large capacity of processing lead concentrate from several mines. This capacity has obviously increased and decreased over time, depending on the number of mines exploited, the presence or absence of ore, the quality of the industrial equipment, the number of employees and other circumstances.
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Яроцкий, Г. П. y Х. О. Чотчаев. "THE VETROVAYAM VOLCANIC ROCKS AND THEIR ORE DISTRICT (SOUTH-WESTERN PART OF THE SOUTH-ESTERN KORYAK BELT)". Геология и геофизика Юга России, n.º 1 (22 de marzo de 2018). http://dx.doi.org/10.23671/vnc.2018.1.11251.
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В Корякском нагорье ярко проявлен прирост континента рядом вулканических северо-восточных орогенных поясов. Они лежат в Морской транзитали литосферы южной окраины СВ Азии и вмещают золото, серебро, самородную серу, медь. Пояса обособлены по простиранию отдельными вулканогенами, которые являются тектоно-магматическим субстратом рудных таксонов. Описан Ветроваямский вулканоген с его элементами системы «тектоника-минерагения» рудного Ильпинского района. Доказано положение вулканогена на тектоническом своде воздымающейся глыбы литосферы, заключённой поперечными межглыбовыми разломами. К востоку от вулканогена лежит территория сильных землетрясений Хаилинского и Олюторского (1991 и 2006 гг.), что определяет вероятную сейсмоопасность для возникающего в районе горнодобывающего предприятия по добыче рудного золота. Certain NE volcanic orogenic belts have contributed into emergence within the Koryak highlands. They are located in the sea transition zone of the lithosphere within the southern margin of NE Asia and host gold, silver, native sulphur, and copper. The belts are isolated along the strike by certain volcanic rocks that are tectonic-magmatic substance for ore taxons. The article describes the Vetrovayam volcanic rocks with their elements of tectonic-minerageny system in the Ilpinsky ore district. The paper provides evidence that the volcanic rocks are located on the arch of rising lithospheric block enclosed by transversal interblock faults. East of the volcanic rock there is a zone of the strong 1991 Khailinsky and 2006 Olyotorsky earthquakes, which allows to suppose probable seismic hazard to developing lode gold mining company constructed in that zone
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Hidayat, Muhamad Kaisya, Noor Fauzi Isniarno y Zaenal. "Pemodelan dan Estimasi Sumberdaya Bijih Emas di PT. DEF Kecamatan Simpenan, Kabupaten Sukabumi, Provinsi Jawa Barat". Bandung Conference Series: Mining Engineering 2, n.º 1 (20 de enero de 2022). http://dx.doi.org/10.29313/bcsme.v2i1.1573.
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Abstract. PT. DEF has a gold and silver mining concession located in Sukabumi district, West Java. Several open pit mining and conventional processing support the production of gold and silver bullion. The mining operations which started in 1995 have shaped the company's reputation as an industry in terms of safety, sustainability and operational performance. PT. DEF prioritizes environmental conservation and the interests of the community as an integral part of its mining cycle. To find out the gold potential of the company, exploration activities are needed which can then be carried out geological modeling of gold ore and calculating the amount of mineral resources. Resource modeling is a series of explorations in the mining sector. In this study, modeling of gold (Au) resources aims to identify, determine a geological picture and delineate in detail the size, shape, distribution, quality and quantity of the ore body in 3D obtained from pilot data in exploration activities. The data needed from exploration data to continue in the collection and processing are drill point coordinate data (collar), lithology data, grade (assay/geology), drill hole direction data, dip and azimuth (survey). In the processing and analysis of Au resources and reserves using the Ordinary Kriging estimation method with a model block size of 1x1x1 meters then calculations are carried out based on the Cut Off Grade (COG) value and classification using Kriging Efficiency. The results of data processing and lithological modeling show the distribution of tuff, breccia and andesite alteration, which tends to lead to the surface in the form of an outcrop. The results of data processing, resource estimates that have been carried out in the research area are divided into two blocks. Block A has a total volume of 243,373 BCM with a tonnage value of 511,083 tons with an inferred resource classification resulting in a volume of 185,849 BCM with a tonnage value of 390,282,9 tons, an indicated volume of 36,949 BCM with a tonnage value of 77,592,9 tons, a measured resource classification the resulting volume is 20,575 BCM with a tonnage value of 43,207.5 tons. Block B has a total volume of 133,460 BCM with a tonnage value of 280,266 tons with an inferred resource classification resulting in a volume of 75,159 BCM with a tonnage value of 157,833.9 tons, indicated a volume of 32,364 BCM with a tonnage value of 67,964.4 tons, a measured resource classification the resulting volume is 25,937 BCM with a tonnage value of 54,467.7 tons.
Abstrak. PT. DEF memiliki konsensi pertambangan emas dan perak terletak di kabupaten Sukabumi, Jawa Barat. Beberapa pit tambang terbuka dan pengolahan konvensional mendukung produksi emas dan perak batangan. Operasi tambang yang telah dimulai pada tahun 1995 telah membentuk reputasi perusahaan sebagai industri dalam hal keselamatan, keberlanjutan dan kinerja operasional. PT. DEF mengutamakan pelestarian lingkungan dan kepentingan masyarakat sebagai bagian integral dalam siklus penambangannya.Untuk mengetahui potensi emas pada perushaan tersebut diperlukannya kegiatan eksplorasi yang kemudian dapat dilakukannya pemodelan geologi bijih emas dan menghitung jumlah sumberdaya bahan galiannya. Pemodelan sumberdaya merupakan suatu rangkaian eksplorasi dalam bidang pertambangan. Pada penelitian ini, pemodelan sumberdaya emas (Au), bertujuan untuk mengidentifikasi, menentukan suatu gambaran geologi dan mendeliniasi secara rinci mengenai ukuran, bentuk, sebaran, kualitas dan kuantitas badan bijih dalam bentuk 3D yang didapatkan dari data-data percontohan dalam kegiatan eksplorasi. Data-data yang diperlukan dari data eksplorasi untuk melanjutkan dalam pengimputan dan pengolahan adalah data koordinat titik bor (collar),data litologi, kadar (assay), data arah lubang bor, dip dan azimuth (data bor). Dalam pengolahan dan analiasa sumberdaya dan cadangan Au menggunakan metode estimasi Ordinary Kriging dengan ukuran blok model yaitu 1x1x1 meter kemudian dilakukan perhitungan berdasarkan nilai Cut Off Grade (COG) serta pengklasifikasian menggunakan Kriging Efisiensi. Hasil Pengolahan data dan pemodelan litologi menunjukan sebaran tufa, breksi dan alterasi andesit, yang kecenderungan batuannya mengarah ke permukaan berupa suatu singkapan. Hasil Pengolahan data, estimasi sumberdaya yang telah dilakukan pada daerah penelitian yaitu dibagi kedalam dua blok. Blok A mendapatkan volume total sebanyak 243.373 BCM dengan nilai tonnase sebesar 511.083 ton dengan klasifikasi sumberdaya tereka dihasilkan volume sebesar 185.849 BCM dengan nilai tonnase sebesar 390.282,9 ton, tertunjuk dihasilkan volume sebesar 36.949 BCM dengan nilai tonnase sebesar 77.592,9 ton, klasifikasi sumberdaya terukur dihasilkan volume sebesar 20.575 BCM dengan nilai tonnase sebesar 43.207,5 ton. Blok B mendapatkan volume total sebanyak 133.460 BCM dengan nilai tonnase sebesar 280.266 ton dengan klasifikasi sumberdaya tereka dihasilkan volume sebesar 75.159 BCM dengan nilai tonnase sebesar 157.833,9 ton, tertunjuk dihasilkan volume sebesar 32.364 BCM dengan nilai tonnase sebesar 67.964,4 ton, klasifikasi sumberdaya terukur dihasilkan volume sebesar 25.937 BCM dengan nilai tonnase sebesar 54.467,7 ton.