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Упит dcterms_subject_txt:borni minerali

475 items

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... Air. Mineral. Petrol. 1998, 62, 123-144. [CrossReft] Crystals 2023, 13, 278 l1of1l 24. 25. 26. 27. 28. Schaufuss, A.G.; Nesbitt, H.W.; Scaini, M.J.; Hoechst, H.; Bancroft, M.G.; Szargan, R. Reactivity of Surface Sites on Fractured Arsenopyrite (FeAsS) toward Oxygen. Am. Mineral. 2000 ...
    ... FeAsS; crystal structure; oxidation; XRPD; TEM 1. Introduction Arsenopyrite (FeAsS) is worldwide abundant natural sulphide, common in various mineral deposit types [1]. Arsenopyrite can incorporate significant amounts of metal ions, such as gold, cobalt, and nickel, either accommodated in the crystal ...
    ... so- lution or as micro-inclusions [2,3]. In particular, the ability of the Au incorporation renders arsenopyrite an economically relevant ore mineral and is the main reason for the extensive industry-driven research. Subjected to exploration and mining activities, arsenopyrite is also one of ...

  • Lamprofiri Kolaričke reke (Boranja)

    Luka Jović (2024)
    Lamprofiri su grupa egzotičnih ultrakalijskih stena poznatih po sadrţaju nekompatibilnih elemenata i elemenata retkih zemalja. U našem delu sveta pojavljuju se u okviru ultrakalijskih provincija u Španiji, Italiji, Srbiji, Makedoniji i Turskoj. U Srbiji su zastupljeni ponajviše u zapadnim delovima zemlje, oko opština Ljubovija i Mali Zvornik, ali i u široj okolini Rudnika, Kopaonika i u istočnoj Srbiji. Mnoga ispitivanja sprovedena su u rudnom polju Veliki Majdan u zapadnoj Srbiji sa čije jugoistočne strane protiče Kolarička reka. Ovaj lokalitet ...
    geohemija, lamprofiri, ultrakalijski magmatizam, elementi retkih zemalja, mešanje magmi, mineta, kersantit, flogopit
    ... Granodiorit Boranje mineraloški se sastoji od kvarca, plagioklasa, kalijskih feldspata, biotita i amfibola. Akcesorni minerali su sfen, apatit, alanit, cirkon, epidot i metalični minerali. Struktura Je neravnomerno zrnasta. Ovi granodioriti, naravno, izvršili su kontaktni metamorfizam na ostale stene ...
    ... alotriomorfnom osnovnom masom, i podređeno augit. Feldspati u Osnovnoj masi su izmenjeni. Takođe se zapažaju diseminacije metaličnog minerala. Od akcesornih minerala zapaženi su apatit ı magnetit, a od sekundarnih kalcit i hlorit. 2.2.9 Kvartar U sevemom i severoistočnom delu lista u kvartaru ...
    ... je od flogopita, biotita ı plagioklasa, sa sekundarnim kalcitom, hloritom, amfibolom i hidroksidima gvožđa. Akcesorni minerali su predstavljeni kvarcem i metaličnim mineralima. Struktura stene je hipokristalasto-porfirska i afirska, sa elementima serijalne i sa sitastom strukturom. U osnovnoj ...

  • Possible problems in mining industry of Serbia

    Jelenković Rade (2012)

  • Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?

    Alena Zdravković, Maja Milošević, Ivana Jelić (2021)
    ... the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not? | Alena Zdravković, Maja Milošević, Ivana Jelić | 8th Mineral Sciences in the Carpathians Conference, Acta Mineralogica-Petrographica, Miskolc, Hungary | 2021 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005499 Дигитални ...
    ... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Acta Mineralogica-Petrographica, Abstract Series, Szeged, Vol. 11, 2021 55 8th Mineral Sciences in the Carpathians Conference, May 13–14, 2021, Miskolc, Hungary REPLICA OF THE “GREAT TRIANGLE GOLD NUGGET” BELONGING TO BELGRADE UNIVERSITY ...
    ... in Moscow, Russia, Kremlin. The gold nugget replica, which is kept today in the Collection of Rocks and Minerals, is part of old and numerous mineral collection which numbered 1525 samples donated by the St. Petersburg’s State Mining Institute of the empress Catherine II (precursor of Saint ...

  • Determination mechanical properties of cement stone for permanent tightness cemented annulus

    Bošković Zvonimir, Čebašek Vladimir, Nuhanović Sanel, Crnogorac Jovana (2014)

  • Deformation and permeability of cement stone of diferent composition in hard formations

    Bošković Zvonimir, Čebašek Vladimir, Nuhanović Sanel, Crnogorac Jovana (2014)

  • Uticaj geološke neizvesnosti u razvoju rudarskih projekata

    Petar Marković, Dejan Stevanović, Mirjana Banković (2023)
    Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...
    ... sisteme izveštavanja: JORC Code, NI 43-101, PERC Code i dr.), [11 (CIM Definition Standards For Mineral Resources and Mineral Reserves, 2014) (Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (The JORC Code), 2012)|. Na žalost, predmetni Zakon ove pojmove nije ...
    ... Integrating joint multi-element geological uncertainty. Journal of Mining Science , 49, 68-81. [4] (2014). CIM Definition Standards For Mineral Resources and Mineral Reserves. Canadian Institute of Mining, Metallurgy and Petroleum. [5] Dimitrakopoulos R. (2018). Advances in Applied Strategic Mine ...
    ... Metallurgy , 3, 82-88. [7] Edwards A.C. (2001). Mineral resource and ore reserve estimation : the AusiIMM guide to good practice. Australasian Institute of Mining and Metallurgy. [8] Emery X., Ortiz J., Rodriguez J. (2006). Quantifying Uncertainty in Mineral Resources by Use of Classification Schemes ...

  • Deformation and permeability of cement stone of diferent composition in soft to medium hard formations

    Bošković Zvonimir, Čebašek Vladimir, Nuhanović Sanel, Crnogorac Jovana (2014)

  • Landslide Susceptibility Zonation in The Kolubara River Basin (Western Serbia) – Analisys of Input Data

    Dragićević Slavoljub, Carević Ivana, Kostadinov Stanimir, Novković van., Abolmasov Biljana, Milojković Branko, Simić Dušan (2012)

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... 3.). Tabela 6.3. Izračunate vrednosti indeksa zasićenja za odabrane minerale MINERALI Indeks zasićenja (SI) KARBONATNI MINERALI Min Max Kalcit CaCO3 -1.7 1.3 Dolomit CaMg(CO3)2 -3.1 3.8 SILIKATNI MINERALI Plagioklas Albit NaAlSi3O8 -3.9 3.18 Feldspati K-Feldspat KAlSi3O8 ...
    ... i drugi silikatni minerali se odlikuju velikom otpornošću, međutim ovi minerali ipak podležu procesima raspadanja, što dovodi do migracije kalijuma u podzemne vode. Kalijumova jedinjenja se rastvaraju u vodama u širokom opsegu pH i Eh vrednosti, međutim sorpcija na mineralima glina znatno smanjuje ...
    ... Izdvajaju se tri ključna perioda u formiranju ove mineralizacije: formiranje primarnih uranovih minerala u magmatskim stenama, alteracija i mobilizacija formiranih minerala, i formiranje sekundarnih minerala urana u sedimentim stenama donje jure koji leže transgresivno i diskordantno preko granitoida ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... 89% in all samples. 4.3. Mineralogy The Kovin lignite is characterized by medium (10–30%) to very high (>50%) mineral matter contents. XRD analyses of lignite ashes show that mineral matter in the coal seam I (Table 3; Figs. 2, 3; Table S­II of the Supplementary material; Figs. S1, S2 of the S ...
    ... parameters for individual samples are given in Table S-III of the Supplementary material to this paper. Table 4. Mineral composition of the Kovin lignite, based on data from SEM-EDS. Mineral phases Content I seam II seam III seam Sulphides Pyrite Sphalerite Galena m m m m m Sulphate Gypsum/Anhydrite ...
    ... m m M M m m m M m m M m M m M m Carbonates Calcite Siderite Dolomite Ankerite M M m m m M Phosphate Monazite m m M–major mineral (>1 vol.%); m–minor mineral (<1 vol.%) G eo lo g ia C ro a ti ca Geologia Croatica 72/158 Figure 4. SEM backscatter images with EDS data of minerals; a) ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... In Serbia, all mineral resources (including: coal, mineral water, therapeutic muds and geothermal resources) and hydrocarbon resources are property of the state. Consequently, legislation for the mineral industry is predominantly defined on the state level. Keywords: mineral resources, development ...
    ... during the Miocene. MINERAL RESOURCES OF SERBIA There are more then 5000 mineral deposits and mineral occurrences in the territory of Serbia (Jankovic et al. 2003; Jelenković et al. 2008; Jelenković & Mijatović, 2014; WEB GIS Mining and Geology; Figure 2). Metallic Mineral Resources: Commodities ...
    ... territory of Serbia, exploration level regarding mineral deposits, available measured and indicated mineral resources and ore reserves, quality and grade of mineral commodities etc.; • „Mining-technical parameters of exploitation and processing of mineral commodities in existing and newly discovered ...

  • Navigacija budućnosti: poslovni rizici i prilike u rudarskoj industriji

    Petar Marković, Dejan Stevanović, Mirjana Banković, Vuk Lazić (2024)
    Sektor rudarstva i metalurgije se globalno suočava sa brzo evoluirajućim okruženjem u 2024. godini, koje karakteriše jedinstvena međusobna zavisnost rizika i prilika. Sektor je u središtu globalne energetske tranzicije, uz rastuću potražnju za kritičnim mineralnim sirovinama poput litijuma, nikla i bakra, koji su od suštinskog značaja za tehnologije obnovljive energije i električna vozila. Međutim, ova sve veća odgovornost donosi brojne izazove, uključujući pojačanu pažnju na ekološke, društvene i upravljačke (ESG) faktore, fizičke i tranzicione rizike uzrokovane klimatskim promenama, i ...

  • Sepiolite – a by-product of exploitation as a potential raw material in Serbian industry

    Radmila Gaćina, Katarina Urošević, Jelena Zakonović (2019)
    This paper gives a brief overview of the sepiolite deposits, the basic properties, and the possibilities of using this mineral. Particular attention is paid to sepiolites from domestic production, especially the use of sepiolites suitable for the development of small businesses and technologies, with a focus on environmental protection. Aim of this paper is to point out importance of this mineral and to draw attention to the use of domestic raw materials. With appropriate mechanical and chemical pretreatments, sepiolite is ...
    sepiolite, by-product, small-scale mine, marginal costs,

  • Litijum u mineralnim vodama Srbije – potencijalna lekovita svojstva

    Jana Štrbački (2022)
    Litijum je biološki aktivan mikroelement u ljudskom organizmu: u malim koncentracijama doprinosi pravilnom funkcionisanju pojedinih enzima, hormona i vitamina, dok se u većim, terapeutskim dozama, koristi za lečenje i prevenciju nekoliko psihijatrijskih poremećaja. Eksperimentalno je dokazano da su litijumske mineralne vode bioraspoloživi izvor ovog mikroelementa, u smislu obezbeđivanja njegovog preporučenog dnevnog unosa. Proučavanjem zakonomernosti raspodele litijuma u mineralnim vodama Srbije konstatovano je da barem 50 pojava sadrži koncentracije litijuma potrebne za unapređenje opšteg zdravstvenog stanja ljudi.
    lekovite mineralne vode, hidrogeološka sredina, mikrodoze litijuma, dijetetski suplementi, Srbija

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... most common mineral is quartz, followed by illite/mica, plagioclase and feldspar. Less present phases are amphibole and calcite. SEM data of the investigated sample shows clay particles of different sizes, which are mostly arranged in a face-to-face pattern. Pseudo-hexagonal mineral layers and kaolinite ...
    ... generous support of Bulgarian sponsors: Assarel-Medet; Geotechmin; Pensoft Publishers Acknowledge for international support:  Society for Mineral Museums Professionals (SMMP) National Scientific Partners:  Geological Institute “Strashimir Dimitrov”, Bulgarian Academy of Sciences, Sofia ...
    ... of intangible cultural heritage, inscribed in the National register of ICH and as geoheritage in Serbia as well. The analysis of the phase, mineral composition and structure of the clay body was performed by optical microscopy on cross-sections perpendicular to the vessel walls. In order to confirm ...

  • Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings

    Vesna Cvetkov, Vladimir Simić, Stefan Petrović, Filip Arnaut, Milena Kostović, Dragan Radulović, Jovica Stojanović, Vladimir Jovanović, Dejan Todorović, Nina Nikolić, Jelena Senćanski, Grozdanka Bogdanović, Dragana Marilović (2024)

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... and exploitation permits and works in the mineral resources field, and represents a basis for archiv- ing and efficient handling of vector, raster and related thematic alphanumeric content in one place, as well as efficient management and usage of mineral resources.8 Google Maps API Web Services are ...
    ... information system of Serbia (GeolISS) 2008-2009, JEMCOV, I. & TRIVIĆ, B. 2009. 8 The project funded by the Provincial secretariat for energy and mineral resources: “Creation of the subsystem for the Autonomous province of Vojvodina within the framework of the geological information system of Serbia ...
    ... : subsection consisting of the gallery of photographs, presentations, and video clips and the subsection reserved for the presentation of jewelry mineral resources of Serbia9. Photo gallery of geological resources of Serbia was created with the use of PHP script language with the addition of Query ...

  • Application of softwares for drilling and blasting

    Stefan Milanović, Lazar Kričak, Milanka Negovanović, Nikola Simić, Jovan Marković (2019)
    U današnje vreme softveri se sve više primenjuju u rudarstvu kroz eksploataciju mineralnih sirovina, projektovanje rudnika, u obavljanju različitih operacija na terenu i sl. Među softverima za rudarstvo, postoje softveri za specifične rudarske operacije, kao što su operacije bušenja i miniranja. Ovi procesi su veoma važni u eksploataciji čvrstih mineralnih sirovina, jer predstavljaju najjeftiniji i najefikasniji oblik fragmentacije stenske mase. Kroz rad, predstavljeni su neki od softvera u kombinaciji sa modernim tehnologijama, koje se koriste širom sveta i koje ...
    softver, moderne tehnologije, miniranje, bušenje, minsko polje

  • Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија

    Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков (2018)
    ... (Luković и др., 2017), међутим наши експерименти за одрђивање магнети‐ чних минерала  указују  на другачији  састав. Мерења Киријеве  температуре показују да  се  током  првог грејања могу препознати два магнетична минерала, један на 409°C, други на Киријевој тем‐ ператури магнетита, на 580°C. Код хлађења ...
    ... за  текто‐ нику како би сазнали да ли је издвојена магнетизација настала у време или након убирања. Експе‐ рименти  за  одређивање  магнетичних  минерала  укључивали  су  мерење  Кријеве  температуре,  стицање изотермалне реманентне магнетизације (ИРМ) корак по корак и корак по корак термалну  дема ...
    ... је  магнетна фаза са нижом и променљивом Киријевом тачком хемоилменит, али процењени састав  са  таквим  Киријевим  тачкама  је  35  (оригинални  минерал)  или  40  (после  првог  грејања)  мол%  илменита.  Пошто  минералошка  и  магнетска  истраживања  нису  изведена  на  истом  узорку,  (али  јесу  ...