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Journal articles on the topic "Pegmatites Pegmatites Pegmatites Mineral industries"
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Stepanyuk, L., O. Hrinchenko, B. Slobodian, V. Semka, S. Kurylo, and T. Dovbush. "GEOCHRONOLOGY OF LITHIUM-BEARING GRANITOIDS OF INGUL MEGABLOCK (UKRAINIAN SHIELD)." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3 (82) (2018): 23–28. http://dx.doi.org/10.17721/1728-2713.82.03.
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Rare-metal elements are strategic metals which, in general, are extremely important for economic development or maintenance of defence capability of any country at the modern level. The list of needs for these strategic metals ranges depending on the level of economic development of certain country, but in general it includes such elements as Li, Ta, Nb, Be, Sb, W, REE and others. The majority of these elements has the lithophilous nature and, therefore, is characterized by close genetic relations with granites and pegmatites associated with them. In the world, industrial production of lithium is shared between deposits to lithium-bearing brine of saline depositions of marine basins (Argentina, Chile), some granites (China) and rare-metal pegmatites (Australia, China, Zimmbabve). In pegmatites lithium mineralization is represented mainly by spodumene (LiAlSi2O6), But other lithium-containing metallic minerals can also play an important role in production of this metal – petalite (LiAlSi4O10), minerals of lepidolite (Sa [Li,Al]3[Si,Al]4O10[F,OH]2) and amblygonite-montebrasite (LiAlPO4 [F,OH]) series. Rare-metal pegmatite of Ingul megablock of Ukrainian Shield can be treated as unique (insufficiently studied in world practice) pegmatitic formations in which the main metallic mineral is represented by petalite. In metallogenic interpretations two ore districts can be distinguished within the megablok, that are specialized on rare metals (Li, Rb, Cs, Be, Ta, Nb, Sn) – Polohivka and Stankuvatka. Deposits and numerous ore manifestations of rare metals formed in rather similar geological and tectonic conditions and have many common features – both country rocks composition and mineralogic composition of ores. Within Ingul megablock (Shpola-Tashlyk rare-metal district) a number of lithium rare-metal deposits associated with pegmatites is discovered. In order to determine the age of lithium mineralization in granites of Lypniazhka, Taburyshche massifs and vein bodies of pegmatitic and aplito-pegmatitic granites, which are selected from different localities of this megablock, are dated by U-Pd isotopic method by monazites. It is established that emplacement of vein granites of Ingul megablock occurred within rather narrow age interval – 2040-2020 Ma and it is not significantly separated in time from formation of most granitoids they are spatially associated with. This fact, together with geological evidences, gives grounds to make the assumption that rare-metal lithium pegmatite are formed in the same age interval.
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Steiner, Benedikt. "Tools and Workflows for Grassroots Li–Cs–Ta (LCT) Pegmatite Exploration." Minerals 9, no. 8 (August 20, 2019): 499. http://dx.doi.org/10.3390/min9080499.
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The increasing demand for green technology and battery metals necessitates a review of geological exploration techniques for Li–Cs–Ta (LCT) pegmatites, which is applicable to the work of mining companies. This paper reviews the main controls of LCT pegmatite genesis relevant to mineral exploration programs and presents a workflow of grassroots exploration techniques, supported by examples from central Europe and Africa. Geological exploration commonly begins with information gathering, desktop studies and Geographic Information System (GIS) data reviews. Following the identification of prospective regional areas, initial targets are verified in the field by geological mapping and geochemical sampling. Detailed mineralogical analysis and geochemical sampling of rock, soil and stream sediments represent the most important tools for providing vectors to LCT pegmatites, since the interpretation of mineralogical phases, deportment and liberation characteristics along with geochemical K/Rb, Nb/Ta and Zr/Hf metallogenic markers can detect highly evolved rocks enriched in incompatible elements of economic interest. The importance of JORC (Joint Ore Reserves Committee) 2012 guidelines with regards to obtaining geological, mineralogical and drilling data is discussed and contextualised, with the requirement of treating LCT pegmatites as industrial mineral deposits.
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Silva, A. L., and E. W. V. Sousa. "New Route of Utilization of Pegmatites Tailings to Application as a Ceramics Raw Materials." Materials Science Forum 820 (June 2015): 18–23. http://dx.doi.org/10.4028/www.scientific.net/msf.820.18.
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The proposal to obtain a new route for exploitation of tailings from pegmatite emerged from the need of many companies that showed to reuse of these tailings as raw materials ceramics. The pegmatites represent a large part of available industrial minerals. These can be classified into: kaolin, feldspar, mica, quartz and metallic minerals such as tantalite / columbite and others. The consumer markets for these minerals are glassmaking, ceramic industries, paper, pulp, metallurgy, etc. Order for the product is fit for sale ceramics and metals companies must be of high purity of this raw material. Therefore, the process of separation of these minerals must be carried out as effectively as possible. In this study, surveys have been made to the development of a new process route which facilitates, an optimized manner, separation from pegmatite, concentrated in the waste process of extracting companies, so that a better product shall be passed through the ceramic industry.
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Baranov, P., O. Slyvna, and O. Matyushkina. "Eco-aesthetic features of mineral deposits." Journal of Geology, Geography and Geoecology 27, no. 1 (July 10, 2018): 20–29. http://dx.doi.org/10.15421/111826.
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The aim of work is a study of worked out fields, under development and explored deposits of minerals for the purpose eco-aesthetics.The basis of eco-aesthetics is the principle of utility (utility, expediency) and beauty (aesthetics).The criteria for assessing the eco-aesthetics of geological objects are economic, environmental and aesthetic characteristics. Developed deposits cause irreparable damage to the geological environment and the entire ecosystem. Extraction from the bowels of the earth of minerals violates the geochemical systems on many decades and centuries, and on occasion changes the landscape of locality. Developed deposits can be economically profitable, ecologically clean and esthetically attractive due to development to the aesthetic and historical aspects. An example is the Wieliczka mine in Poland, where business, ecology and aesthetics are harmoniously combined. A number of the largest worked out fields and developed fields in Ukraine are in extremely need of the development of this issue. Developed iron ore deposits are one of the important factors of industrial potential of Ukraine. Semiprecious stone material, jaspilite, is the aesthetic aspect of these fields. They have colossal reserves. Using their decorative properties, we have developed the laws of shaping for the design of natural stone, identified the main areas of application of jaspilites in decorative art. Implementation of the idea of creating a Jespilite room will allow Krivbas not only industrial, but also cultural and educational center. The achieved results will qualitatively improve the eco conditions for the local population, the development of stone carving art and will lead to business growth. The explored deposits of spodumene pegmatites in the Western sea of Azov in addition to lithium mineralization contain expansive fields of graphic microcline pegmatites, spodumene and albitic pegmatites. They contain samples of pink spodumene (kunzite), petalite from light green to pink, tourmaline (sherl). Thus, this deposits of spodumene pegmatites in Western Azov today require a comprehensive assessment of minerals, because in addition to ore mineralization there is also a gemstone-colored raw material.
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Zahradník, Jan, Jakub Jirásek, Jaromír Starý, and Martin Sivek. "Production, Reserves, and Processing of Feldspar and Feldspathoid Rocks in the Czech Republic from 2005 to 2019—An Overview." Minerals 10, no. 8 (August 17, 2020): 722. http://dx.doi.org/10.3390/min10080722.
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This paper aims to characterize and interpret the trends in reserves, resources, and mine production of feldspar and feldspathoid rocks during 2005–2019 in the Czech Republic. With over 101 Mt of total resources and 22 Mt of reserves, feldspar belongs to the crucial industrial minerals of the Czech Republic. With annual outputs of approximately 400–450 kt of feldspars and 20–35 kt of feldspathoid rocks (nepheline syenite), the Czech Republic ranks among the top European and world feldspar producers. Most of the production comes from leucocratic granitoid rocks (key active deposit: Krásno-Vysoký Kámen), followed by sedimentary rocks (key active deposit: Halámky), and granitic pegmatites (key active deposit: Luženičky). Nepheline syenite is mined at a single deposit. All deposits are extracted from open pits (quarries). Ongoing geological prospecting and exploration for new deposits are increasing available reserves and resources. The feldspar raw materials are used in the domestic glass and ceramic industries, while more than 50% is exported, generally to Poland and Germany.
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London, David. "Granitic pegmatites." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 87, no. 1-2 (1996): 305–19. http://dx.doi.org/10.1017/s0263593300006702.
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ABSTRACT:The primary focus of this review is on P-T conditions, mineralogical indicators of melt or fluid composition and textural evolution; lesser treatment is given to pegmatite sources or to pegmatite-wallrock interactions. Investigations of stable and radiogenic isotopes have revealed that the source materials for pegmatites are likely to be more heterogeneous or varied than previously thought, especially for peraluminous pegmatites, but that overall pegmatites bear a clear intrusive relationship with their hosts, as opposed to an origin in situ. The P-T conditions of crystallisation of some lithium-rich pegmatites have been constrained by lithium aluminosilicate stability relations in combination with stable isotope or fluid inclusion methods. Experimental studies have elucidated the effects of components such as Li, B, P and F, which are common in some classes of pegmatites, to liquidus relations in the hydrous haplogranite system. Experimentation has also provided corroboration of an old concept of pegmatite crystallisation—that pegmatites owe their distinctive textures and mineral/chemical zonation to relatively rapid crystallisation of melt from the margins inwards at conditions far from the equilibrium (i.e. from supercooled liquids). The origin of aplites, whether alone, layered, or paired with pegmatites, remains an active area of research. Studies of fluid inclusions, crystal-vapour equilibria and wallrock alteration have helped to define the timing and compositions of vapour phases in pegmatites and to aid in the economic evaluation of deposits.
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Glover, A. S., W. Z. Rogers, and J. E. Barton. "Granitic Pegmatites: Storehouses of Industrial Minerals." Elements 8, no. 4 (August 1, 2012): 269–73. http://dx.doi.org/10.2113/gselements.8.4.269.
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Popov, V. A., M. A. Rassomakhin, and S. V. Kolisnichenko. "A Unique Ore Locality of Polyakovite-(Ce) in the Ilmeny Mountains, South Urals – New Finds." МИНЕРАЛОГИЯ (MINERALOGY) 6, no. 1 (March 30, 2020): 17–32. http://dx.doi.org/10.35597/2313-545x-2020-6-1-2.
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A large crystal of the rarest mineral polyakovite was discovered in 2019 in the carbonatites-pegmatites of pit № 97 of the Ilmeny Mountains. Bodies of carbonatites, glimmerites, glimmerites-pegmatites and carbonatite-pegmatites are located within a small complex body of alkaline ultramafites and carry a unique range of mineral assemblages (rocks), as well as rare-metal and Ree minerals, which is unique for this famous mineral province. Figures 18. Tables 2. References 12. Key words: polyakovite-(Ce), rare-metal and Ree minerals, alkaline ultramafites, carbonatites, glimmerite, carbonatite-pegmatites, South Urals, Ilmen Mountains.
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Nie, Xiao, Zongqi Wang, Lei Chen, Gang Wang, and Zengda Li. "Geochemical Contrasts between Late Triassic Rb-Rich and Barren Pegmatites from Ningshan Pegmatite District, South Qinling Orogen, China: Implications for Petrogenesis and Rare Metal Exploration." Minerals 10, no. 7 (June 28, 2020): 582. http://dx.doi.org/10.3390/min10070582.
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The Ningshan pegmatite district in the South Qinling Orogen hosts numerous Rb-(Be) mineralized pegmatites. In this study, whole-rock geochemistry, mineral geochemistry, and zircon U–Pb isotopes of the Rb-rich and barren pegmatites were determined. The barren pegmatites consist mainly of muscovite, microcline, albite, quartz, and garnet, whereas the Rb-rich pegmatites are mainly composed of muscovite, albite, quartz, and beryl, with minor chrysoberyl, cassiterite and columbite-group mineral. The muscovite and albite are the main Rb-bearing minerals. The U–Pb zircon dating of the Rb-rich and barren pegmatites yielding an age of 212–203 Ma, which is similar to that of the neighboring two-mica monzogranites distributed in the Ningshan area. Compared with the two-mica monzogranites, geochemical features, such as the Zr/Hf, Rb/Sr and Nb/Ta ratios and trace element contents indicated that the Rb-rich and barren pegmatites derived from fractionation of the two-mica monzogranites. In combination, the current and previous results suggest that the fractionation of the two-mica monzogranites caused the generation of the affinitive residual melts that, finally, crystallized to form the pegmatites. Compared to those from the barren pegmatites, the apatite from the Rb-rich pegmatites have higher MnO (14.51–19.12 wt.%) and Cl (0.12–0.16 wt.%) contents and lower F/Cl rartios (20–29). We conclude that these differences reflect unique geochemical signatures, and the geochemical composition of the apatite can be used as exploration guidance for rare metal-rich pegmatites.
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Grew, Edward S. "The Minerals of Lithium." Elements 16, no. 4 (August 1, 2020): 235–40. http://dx.doi.org/10.2138/gselements.16.4.235.
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Lithium is rare in the cosmos, but the formation of continental crust has concentrated lithium into economic deposits. The 124 recognized Li mineral species occur largely in four geologic environments: (1) lithium–cesium–tantalum (LCT) granitic pegmatites and associated metasomatic rocks; (2) highly peralkaline pegmatites; (3) metasomatic rocks not directly associated with pegmatites; (4) manganese deposits. The geologically oldest Li minerals are reported from LCT pegmatites and date to 3,000–3,100 Ma, a critical period in the evolution of the continental crust and the rate of its generation. This suggests a link between the earliest appearance of LCT-family pegmatites and the onset of plate tectonics, consistent with the correlation between the observed abundance of LCT-family pegmatites and supercontinent assembly.
Dissertations / Theses on the topic "Pegmatites Pegmatites Pegmatites Mineral industries"
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Minnaar, Hendrik. "The exploitability of pegmatite deposits in the lower Orange River area (Vioolsdrif - Henkries - Steinkopf)." Pretoria ; [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02212007-143602.
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Senzani, Freeman Elther David. "Pegmatite-hosted mineral deposits of central and southern Africa : regional geological settings and preliminary exploration target considerations." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1006087.
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Review of literature shows that rocks of all ages from the Archaean to the early Phanerozoic host pegmatite-based mineralisation in the central and southern region of the African continent. The greatest concentrations occur in the Archaean and late Proterozoic orogenic belts, while early to middle Proterozoic granites do not, in general, host mineralisation. Pan-African mineralisation is present, but is not widespread. Some deposits previously considered to be of Pan-African have been shown to be of Proterozoic age. In common with occurrences of other regions, the deposits are closely associated with small, late- to post-tectonic granites. Therefore, preliminary assessment of the potential of granites as sources of pegmatite mineralisation should utilise satellite data or aerial photographs. The granites also tend to be alkaline and peraluminous. Thus, in the next stage, chemical analysis for selected major and trace elements should be conducted directly on granites if they occur as small plutons. For large granitic batholiths or terranes, preliminary stream-sediment surveys may be necessary to reduce the size of the target area. Subsequently, pegmatite zonation around suitable granites should be assessed as it allows attention to be focussed on areas likely to host the specific type of mineralisation being explored for.
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Whitworth, Martin P. "Magmatic and hydrothermal processes during petrogenesis and lithium mineralisation of granite pegmatites of SE Ireland." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/8796.
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Silva, Dilsom Barros da. "Aspectos sócio-econômico-ambiental do processo de extração do caulim no município de Junco do Seridó-PB." Universidade Federal da Paraíba, 2011. http://tede.biblioteca.ufpb.br:8080/handle/tede/5798.
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The paper entitled "Socio-Economic and Environmental Process Extraction of Kaolin in the Municipality of Junco do Seridó/PB" is a guided study on the extraction of kaolin in the municipality of Junco do Seridó/PB, which is the largest production center of this mineral in the state Paraíba. This activity is the basis of an extensive and complex supply chains that clay mineral widely used in industry, ceramics, refractories, rubber, paper and paint systems. The extraction of mineral resources is the main source of jobs and income for local people. Currently, about eight hundred men work in mines kaolin, risking their lives in the face of imminent dangers and risks of landslides and still subject to a daily wage of only thirty dollars. Other features consist of the use of tools craft inefficient production, lack of appropriate mining techniques, the expenditure of physical effort in excess, beyond the dismissal of personal protective equipment, even aware of the dangers of underground excavations. Workers are exposed to health hazards and even cases of fatal accidents inside the mines. In most cases, workers are relegated to the margins of legality and informality. To address the socio-economic-environmental process of extracting the kaolin in the municipality of Junco do Seridó/PB. Emphasized that the working conditions of miners in the extractive areas relating them to the sustainability indicators. To set the characterization of aspects, interviews with professionals in the areas of health, education, social class and cooperative. As a result, site visits were conducted to investigate the facilities and working conditions during the extraction process. This activity was characterized as being unsustainable for most of the indicators of sustainability. In light of this concept was performed to analyze the data collected during this study. Based on the Socio-Economic and Environmental extraction of kaolin indicated in this study showed the need for a scientific and technical contribution, planning and strategic management, public policy, training for operation and efficient organization in cooperatives to ensure this type of extraction a sustainable supply chain Junco do Seridó/PB.
O trabalho intitulado Aspectos Sócio-Econômico-Ambientais do Processo de Extração do Caulim no Município de Junco do Seridó/PB é um estudo pautado na extração do caulim no município de Junco do Seridó, que é o maior pólo produtor desse mineral no estado da Paraíba. Essa atividade é a base de uma extensa e complexa cadeia produtiva desse argilomineral muito utilizado nos setores industriais, cerâmicas, refratários, borrachas, papel e sistemas de tintas. A extração desse recurso mineral é a principal fonte geradora de trabalho e renda para a população local. Atualmente, cerca de oitocentos homens trabalham nas minas de caulim, arriscando suas vidas diante dos iminentes perigos e riscos de desabamentos e ainda submetidos a uma remuneração diária de apenas trinta reais. Outras características consistem na utilização de ferramentas artesanais pouco eficientes na produção, carência de técnicas de lavra adequadas, dispêndio de esforços físicos em excesso, além do desprovimento de equipamentos de proteção individual, mesmo conscientes dos perigos das escavações subterrâneas. Os trabalhadores se expõem aos danos à saúde e até mesmo casos de acidentes fatais dentro das minas. Na maioria dos casos, os trabalhadores estão postos à margem da legalidade e na informalidade. Para apontar os aspectos sócio-econômico-ambientais do processo de extração do caulim no município de Junco do Seridó/PB, enfatizaram-se as condições de trabalho dos garimpeiros nas áreas extrativistas relacionando-as com os indicadores de sustentabilidade. Para definir a caracterização dos aspectos, foram realizadas entrevistas com profissionais das áreas da saúde, educação, assistência social e cooperativa da classe. Na sequência, foram realizadas visitas in loco para averiguar as instalações e condições de trabalho durante o processo de extração. Essa atividade caracterizou-se como sendo insustentável na maioria dos componentes indicadores de sustentabilidade. À luz desse conceito foi realizada a análise dos dados coletados durante esta pesquisa. Com base nos aspectos Sócio-Econômico-Ambientais da extração do caulim apontados neste estudo, constatamos a necessidade de um aporte técnico-científico, planejamento e gestão estratégica, políticas públicas, capacitação para operacionalização e organização em cooperativas eficientes para que esse tipo de extrativismo garanta uma cadeia produtiva sustentável em Junco do Seridó/PB.
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Ranorosoa, Nadine. "Etude mineralogique et micromonometrique des pegmatites du champ de la sahatany (madagascar)." Toulouse 3, 1986. http://www.theses.fr/1986TOU30210.
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Le champ pegmatitique de la sahatany, d'age parafricain, se situe dans un ensemble de metasediments a tendances evaporitiques: les pegmatites potassiques et les pegmatites sodolithiques. Etude microthermometrique des inclusions fluides dans le quartz, la topaze et le spodumene. Ces fluides indiquent des conditions hydrothermales de temperatures elevees autour de 350-500**(o)c pour une pression de 2000-3000 bars. Les inclusions solides peuvent constituer des residus du stage magmatique
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Fernandes, José Augusto de Abreu Peixoto. "Potencialidades dos depósitos pegmatíticos de quartzo e de feldspato em Portugal." Doctoral thesis, Universidade de Aveiro, 2006. http://hdl.handle.net/10773/8958.
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Doutoramento em GeociênciasO principal objectivo deste trabalho consiste em caracterizar e avaliar as potencialidades dos quartzos e feldspatos provenientes de pegmatitos, tendo em conta a especificidade dos diferentes mercados a que se destinam e a crescente procura que se tem vindo a registar relativamente àquelas matériasprimas. Nesse sentido, essas matérias caracterizaram-se sob os pontos de vista químico e mineralógico, porque estes são os mais limitadores relativamente às aplicações industriais. Contudo, também se incluiu neste trabalho a caracterização geológica dos depósitos pegmatíticos, as ocorrências geológicas de quartzo e feldspato nacionais, uma selecção dos métodos de prospecção e pesquisa susceptíveis de aplicação nestes depósitos, a definição de métodos de extracção e tecnologias de tratamento a aplicar, a caracterização das produções e mercados do quartzo e feldspato, nacionais e estrangeiros, a definição de áreas e respectivos enquadramentos geográfico e geológico, com potencial para a exploração e produção daqueles materiais, as técnicas de análise, química e mineralógica, adequadas à caracterização dos materiais pegmatíticos, uma avaliação das possíveis aplicações dos materiais, rochosos ou não rochosos, associados às formações pegmatíticas numa óptica de exploração integral, uma abordagem económica função da paragénese dos depósitos em estudo e, por último, a definição de possíveis aplicações industriais para os quartzos e feldspatos aqui ensaiados. Foram seleccionadas áreas geográficas onde a ocorrência de quartzo e feldspato proveniente de depósitos pegmatíticos é mais frequente, tais como os distritos de Braga, Viseu, Guarda, Castelo Branco e Évora.
The main aim of this work is to characterize and evaluate the potentialities of the quartz and feldspar extracted from pegmatite, taking into account the specificity of the different markets they are destined for and the growing demand for these raw materials. To this end, these materials are characterized chemically and mineralogically, since these aspects are the most restrictive when it comes to industrial applications. Furthermore, this research also covers the geological characterization of the pegmatitic deposits; the geological occurrences of national quartz and feldspar; a selection of prospecting and research methods that can be applied to these deposits; the definition of extraction methods and processing technologies to be applied; the characterization of national and international quartz and feldspar productions and markets; the definition of areas and the corresponding geographical and geological settings, with the potential for the mining and production of these materials; the most appropriate analysis techniques, both chemical and mineralogical, when classifying pegmatitic deposits; an evaluation of the possible applications for the materials, rocky and non-rocky, associated with pegmatitic formations, from a full-mining perspective; an economic approach with regard to the paragenesis of the deposits at hand; and, finally, the definition of the possible industrial applications for the quartzes and feldspars here tested. The geographical areas were selected based on the most common occurrence of pegmatitic quartz and feldspar, like the districts of Braga, Viseu, Guarda, Castelo Branco and Évora.
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Phillips, David. "Mineralogy and petrology of the Townlands iron-rich ultramafic pegmatite." Thesis, Rhodes University, 1985. http://hdl.handle.net/10962/d1007617.
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The Townlands iron-rich ultramafic pegmatite is a relatively large pipelike body situated in the western corner of Rustenburg Section, Rustenburg Platinum Mines. It is characterised by a strong negative magnetic signature and transgresses the noritic layered sequence of the upper critical zone of the Bushveld Complex. The layered rocks are downwarped in the vicinity of the pipe and are in sharp contact with the pegmatitic material. The pegmatite varies in composition between dunite and wehrlite, with the marginal zones being more wehrlitic in composition. Olivine (Fo₃₀ - Fo₅₂) and clinopyroxene (Wo₄₅En₃₀Fs₂₅ - Wo₄₅En₃₇Fs₁₈) are the dominant constituents and accessory phases include ilmenite, Ti -magnetite, apatite, amphiboles, chlorite-group minerals, biotite, ilvaite and a host of unusual ore minerals. The Fe-Ti oxides exhibit exsolution textures typically found in slowly cooled igneous rocks and temperatures of formati on are consi dered to be in excess of 800°C. The UG2 chromitite leader layers intersected by borehole TLP.l are enriched in Fe and Ti and exhibit compositions intermediate between chromite and Ti-magnetite. The ore mineral assemblage includes a primary sulphide assemblage consisting of troilite, chalcopyrite, cubanite and pentlandite, and an array of unusual phases formed by late-stage secondary processes. The unusual sulphides mooihoekite and haycockite, that occur in certain parts of the pegmatite, are considered to have formed by partial replacement of the primary assemblage and a possible paragenetic sequence is discussed. Mineral compositions and whole rock geochemical data are consistent with an origin for the pegmatite by crystallization from a fractionated melt. It is suggested that intercumulus fluids, trapped during the crystallization of the noritic layered sequence, accumulated in an area of structural weakness, in response to an increasing overburden pressure and/or tectonic activity. Evidence is also presented that indicates that the Townlands pegmatite may consist of at least two separate, but adjoining pegmatite bodies.KMBT_363
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Barroso, Leonardo Santana. "Pesquisa mineral de pegmatitos na região leste de Minas Gerais em contexto de mineração de pequena escala." Master's thesis, 2019. http://hdl.handle.net/1822/64789.
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Dissertação de Mestrado em Geociências (Especialização em Valorização de Recursos Geológicos)O trabalho dedica-se à Prospecção e Pesquisa Mineral de pegmatitos na região leste de Minas Gerais- Brasil, em contexto de Mineração de Pequena Escala (MPE). Foram investigados 811 depósitos pegmatíticos (minas e garimpos), cadastrados pelo Projeto Leste (1998). Os jazigos descritos foram contextualizados com os Cenários de Geologia e Mineração, do Projeto de Ordenamento Territorial Geomineiro (2008) e, posteriormente, submetidos à análise de critérios de avaliação, que culminaram na seleção de 78 Pegmatitos com Relevante Interesse para Mineração (PRIM’s). A Prospecção Mineral dos pegmatitos foi desenvolvida por meio de ferramentas e técnicas de Geoprocessamento, que deram suporte a etapa de Geologia de Campo. Os métodos investigativos foram aplicados de acordo com a sequência gradativa das fases de prospecção: Estratégica, Tática e Pontual. A cartografia temática, desenvolvida nas duas primeiras fases de prospecção, permitiu identificar tendências e características intrínsecas dos Campos e Distritos Pegmatíticos investigados. A fase de prospecção pontual realizou a interceção dos pegmatitos no terreno, possibilitando a caracterização mineralógica e estrutural dos jazigos, descritos como controle das mineralizações. Para melhor compreensão das massas pegmatíticas em profundidade, foram executados serviços mineiros tradicionais, para abordagem direta das jazidas, através de galerias, cavas, poços e etc. Além desses, foi aplicado ainda o método de prospecção geofísica de Georadar (GPR), com intuito de reconhecer depósitos em subsuperfície e ainda, identificar anomalias geofísicas associadas a zonas de cavidades (bolsadas), produtoras de gemas e minerais de coleção. A Prospecção Mineral permitiu definir blocos de Reservas Minerais orientados ao aproveitamento mineral integrado dos pegmatitos. Os depósitos avaliados como aptos para o desenvolvimento de novos projetos mineiros foram encaminhados para regularização junto ao órgão regulador (DNPM/ANM). O objetivo principal do trabalho foi apresentar um estudo amplo e integrado dos pegmatitos da região com vista o aproveitamento mineral e o fomento mineiro e, por consequência, buscou-se criar uma metodologia de pesquisa replicável a outros depósitos pegmatíticos, inseridos em outras regiões do Brasil. Considerando o crescente valor estratégico atribuído aos recursos pegmatíticos, vislumbra-se a aplicabilidade efetiva para as metodologias e resultados aqui exploradas ,tanto para o Ordenamento Territorial de recursos geológicos, quanto para a atração de novos investimentos no setor mineral, incrementando o desenvolvimento intelectual, social e econômico do Brasil.
The work is dedicated to Prospection and Mineral Research of pegmatites in the eastern region of Minas Gerais, Brazil, in the context of Small Scale Mining (SSM). 811 pegmatitic deposits (mines and diggings), registered by Projeto Leste (1998), were investigated. The deposits described were contextualized with the Geology and Mining Scenarios of the Geomining Territorial Planning Project (2008) and were subsequently subjected to the analysis of evaluation criteria, which culminated in the selection of 78 Pegmatites with Relevant Interest for Mining (PRIM's). The Mineral Prospecting of the pegmatites was developed from tools and techniques of Geoprocessing, that supported the stage of Field Geology. The investigative methods were applied according to the gradual sequence of the phases of exploration: Strategic, Tactical and Specific. The thematic cartography developed in the first two phases of exploration allowed the identifications of trends and intrinsic characteristics in the Fields and Pegmatitic Districts investigated. The specific prospecting phase carried out the interception of the pegmatites on the ground, making possible the mineralogical and structural characterization of the deposits described as mineralization control. For a better understanding of the pegmatitic masses in depth, traditional mining services were performed, for direct approach to the deposits, through galleries, cavas, wells and others. In addition, geophysical prospecting (GPR – Ground Penetrating Radar) was applied to identify subsurface deposits and to identify geophysical anomalies associated with areas of pockets (pockets), producing gems and collection minerals. The Mineral Prospecting allowed to define blocks of Mineral Reserves oriented to the mineral utilization of pegmatites. The deposits assessed as eligible for the development of a new mining project were submitted to regularization with the regulatory body (DNPM / ANM). The main objective of this work was to present a comprehensive and integrated study of the pegmatites of the region with a view to mineral utilization and mineral development and, consequently, sought to create an integrated research methodology replicable to other pegmatitic deposits, inserted in other regions of the region. Brazil. Considering the increasing strategic value attributed to pegmatitic resources, it is possible to see the effective applicability to the methodologies and results explored here, both for the Territorial Ordering of geological resources and for the attraction of new investments in the mineral sector, increasing the intellectual, social development and economic development of Brazil.
Books on the topic "Pegmatites Pegmatites Pegmatites Mineral industries"
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Bannatyne, B. B. Industrial minerals in Rare-element Pegmatites of Manitoba. Manitoba: Energy and Mines Geological Services, 1985.
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Pekov, Igorʹ V. Lovozerskiĭ massiv: Istorii︠a︡ issledovanii︠a︡, pegmatity, mineraly. Moskva: Zemli︠a︡, 2001.
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Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrothermalites (Russian Mineral Localities Series). Ocean Pictures Ltd, 2004.
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B, Thompson Woodrow, ed. A Collector's guide to Maine mineral localities. Augusta, Me: Maine Geological Survey, Dept. of Conservation, 1988.
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B, Thompson Woodrow, ed. A Collector's guide to Maine mineral localities. 2nd ed. Augusta, ME: Maine Geological Survey, Dept. of Conservation, 1991.
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A collector's guide to Maine mineral localities. 3rd ed. Augusta, ME: Maine Geological Survey, Natural Resources Information and Mapping Center, Dept. of Conservation, 1998.
Find full textBook chapters on the topic "Pegmatites Pegmatites Pegmatites Mineral industries"
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Dittrich, Thomas, Thomas Seifert, Bernhard Schulz, Steffen Hagemann, Axel Gerdes, and Jörg Pfänder. "Geochemistry of LCT Pegmatites." In SpringerBriefs in World Mineral Deposits, 77–86. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10943-1_4.
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Dittrich, Thomas, Thomas Seifert, Bernhard Schulz, Steffen Hagemann, Axel Gerdes, and Jörg Pfänder. "Geochronology of Archean LCT Pegmatites." In SpringerBriefs in World Mineral Deposits, 87–94. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10943-1_5.
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Dittrich, Thomas, Thomas Seifert, Bernhard Schulz, Steffen Hagemann, Axel Gerdes, and Jörg Pfänder. "Introduction to Archean Rare-Metal Pegmatites." In SpringerBriefs in World Mineral Deposits, 1–21. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10943-1_1.
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Dittrich, Thomas, Thomas Seifert, Bernhard Schulz, Steffen Hagemann, Axel Gerdes, and Jörg Pfänder. "Geological Settings of Archean Rare-Metal Pegmatites." In SpringerBriefs in World Mineral Deposits, 23–59. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10943-1_2.
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Dittrich, Thomas, Thomas Seifert, Bernhard Schulz, Steffen Hagemann, Axel Gerdes, and Jörg Pfänder. "Genesis of Massive Pollucite Mineralisation in Archean LCT Pegmatites." In SpringerBriefs in World Mineral Deposits, 103–25. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10943-1_7.
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Laskou, M. D. "Chemical and mineralogical characteristics of tourmaline in pegmatites from Vavdos, Chalkidiki peninsula, N Greece." In Mineral Deposit Research: Meeting the Global Challenge, 769–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_196.
Full textConference papers on the topic "Pegmatites Pegmatites Pegmatites Mineral industries"
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Rudko, Georgii, Mariia Kyrilo, and Maksym Ozerko. "MULTICOMPONENT DEPOSITS WITH BY-PRODUCT AS THE MAIN SOURCE OF FELDSPAR RAW MATERIALS FOR MODERN TECHNOLOGIES." In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b1/v3/32.
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"Feldspar is raw materials with a growing volume of production every year, as well as a price for it. Feldspar consumption has been gradually increasing in ceramics, glass industry for solar panels, housing, and building construction. Feldspar raw materials include intrusive, effusive rocks, weathering crust of crystalline rocks, sedimentary altered and altered rocks, as well as partially medium and basic aluminosilicate rocks. It was defined an industrial application for each species of feldspar. Potassium feldspars (orthoclase, microcline, sanidine) are used in electroceramic, electrode, abrasive, and ceramics industries. For these productions, the potash module is fixed in a ratio of 2: 1. For some industries, in particular the manufacture of high-voltage ceramics, the necessary feldspars are as close as possible to pure potassium (with a modulus of at least 4: 1, which corresponds to 80% of the orthoclase component). Potassium-sodium raw materials, from a potassium modulus of at least 0.9, are used for building construction. Sodium minerals with non-standardized potassium modulus are used for the glass industry, the production of enamels, and products such as vitreous porcelain. Calcium feldspars, represented by plagioclase of higher numbers, have limited practical application and their presence in feldspar concentrates is undesirable. According to mineral associations, all types of feldspar raw materials can be divided into five types: 1) feldspar (syenites, trachitis); 2) quartz-feldspar (pegmatites, granites, sands, etc.); 3) nepheline-feldspar (nepheline syenites, alkaline pegmatites); 4) quartz-sericite-feldspar (shales, secondary quartzites); 5) quartz-kaolinite-feldspar (sands, alkaline kaolins, secondary quartzites). It is shown on the example of Ukrainian deposits of feldspar minerals that complex deposits with by-products become the main source for production. Especially if these are new mining operation facilities. The authors have identified three main types of such complex multicomponent deposits: 1) deposits of intrusive rocks where weathering crust of crystalline rocks are mined as a byproduct; 2) complex deposits, where feldspar rocks are enclosing or overburden and can also be considered as byproducts; 3) deposits where feldspar concentrate can be produced as a product of ore components processing."
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Pavlidis, Sofia Borisovna. "GEOLOGICAL AND GENETIC FEATURES CHAMBER PEGMATITES." In IV Международная научно-практическая конференция "Научные исследования и инновации". KDU, Moscow, 2021. http://dx.doi.org/10.31453/kdu.ru.978-5-7913-1168-9-2021-45-49.
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This article is devoted to the analysis of the genetic features of chamber pegmatites of Volyn. The author dwells in detail on their mineral composition, describes the connection of pegmatites with containing rocks. Special attention in the work is paid to pegmatite formation, the stages of formation of chamber pegmatites.
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Naumenko, Eu, A. Andreev, and S. Shnyukov. "QITIANLINGITE - A NEW MINERAL FROM THE GRANITE PEGMATITES OF THE VOLODARSK-VOLYN DEPOSIT." In Monitoring 2019. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201903182.
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Cawood, Tarryn, Amy C. Moser, and Ariel Borsook. "LARAMIDE THRUSTING IN SE CALIFORNIA: NEW AGE CONSTRAINTS FROM LATE SYN-KINEMATIC PEGMATITES AND ACCESSORY MINERAL PETROCHRONOLOGY." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-335996.
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