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Упит dcterms_subject_txt:early Toarcian Anoxic Event

137 items

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... Caminos, Department of Applied Mathematics, Madrid, Spain jelka.krusic @rgf.bg.ac.rs Abstract The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... lithosphere beneath the European upper plate (i.e., the Sava subduction system, Schmid et al. 2020). Coevally, following the Early Cretaceous W-ward subduction and late Early Cretaceous closure of the Ceahlău–Severin Ocean and Carpathians continental collision, the Supragetic Unit was thrusted over ...
    ... Based on the observed mineral assemblage and recrystallization features of the main rock-forming minerals, we estimate that the primary metamorphic event that affected the Northern Serbo-Macedonian Subunit was in the amphibo- lite facies at temperatures of 500–550 °C and pressure of 0.5–0.7 GPa, with ...
    ... and local sub-grain rotation in quartz and feldspar grains, as well as the mineral assemblage with retrograde chlorite indicate that the shearing event occurred at temperatures of ~400–450 °C and 0.3–0.5 GPa, indicating retrograde greenschist metamorphic facies which followed primary amphibolite ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... related to the latest Jurassic-earliest Cretaceous deforma- tion event. In contrast, Djokovic (1985) interpreted the same structures as being related to a Paleozoic deformation event. 5.3 Implications for the Late Jurassic-Early Cretaceous evolution of the Drina-Ivanjica thrust sheet Part of ...
    ... grain dating of detrital Wwhite micas in the Vardar Flysch unit also yielded an Early Cretaceous age group (c.a. 105—150 Ma) (Ilic et al. 2005). Our 130-150 Ma K/Ar ages suggest a slightly older metamorphic event that affected the Paleozoic and in the Northern Triassic unit of the Drina-Ivanjica ...
    ... the traces of Late Jurassic- Early Cretaceous tectonometamorphic events. We focus on the Drina-Ivanjica thrust sheet, where the conditions of the Cretaceous-Paleogene tectonic evolution are poorly understood. Moreover, the geological record of Late Jurassic-Early Cretaceous tectonometamorphic ...

  • FrameNet Lexical Database: Presenting a Few Frames Within the Risk Domain

    Aleksandra Marković, Ranka Stanković, Natalija Tomić, Olivera Kitanović (2021)
    U radu se daje kratak prikaz teorije semantike okvira, na kojoj je zasnovana leksička baza Frejmnet. Predstavljena je koncepcija ove mreže, kao i mogućnosti njene primene. Predstavljena je i leksička analiza koja se primenjuje u projektu izrade Frejmneta i ukazano na razlike između analize zasnovane na okviru u odnosu na analizu zasnovanu na reči. Zatim je prikazano nekoliko povezanih okvira koje prizivaju reči iz domena rizika. U radu je predstavljena i platforma NLTК pomoću koje se mogu koristiti ...
    Srpski jezik, semantika okvira, FrameNet, scenario rizika, rudarski korpus, obrada prirodnog jezika
    ... central to the RISK scenario or the Protagonist. The Protagonist takes a risk willingly or otherwise or runs the risk; possible Bad outcome or Harmful event; the Decision which may lead to a bad outcome; a Purpose; an Action; certain Circumstances in which the protagonist stands; an Asset (a person or an ...
    ... Infotheca Vol. 21, No. 1, September 2021 9 Marković A. et al., FrameNet Lexical Database. . . , pp. 7–33 belongs to, a description of the situation or event represented by the frame and creating a list of words whose meaning would be described with reference to that frame (Fillmore et al. 2003, 299).7 After ...
    ... lexicographer tries to describe the frame the LU belongs to more closely. After that, he writes the definition of the frame – a schematic description of an event which is central to a word, along with the names of participant roles called frame elements. The way in which frame elements are expressed in sentence ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... The second stage is related to hydrothermal activity when W and Fe were brought into the system probably by a boiling process in the volcanic event in the late Oligocene 23.9 Ma. Keywords: grandite, garnets, skarn, Rudnik. Introduction Study of the composition of common skarn minerals and ...
    ... we conclude that: • Rudnik skarns and hornfelses formed by contact-metamor- phism of carbonate rocks, clastic rocks and shales during volcanic event that took place in the late Oligocene; • The studied garnets from the Rudnik orefield show that in the first stage during garnet slow growth conc ...
    ... reactions controlled by fluid pathways. Zoned garnets with Al-rich cores and Fe-rich rims are the commonest in skarn systems, due to the tendency of early prograde garnets to be Al-enriched and retrograde in the first stage or later garnets to be Fe-enriched in the second stage (Einaudi et al. 1981; ...

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... The following sequence of techniques and procedures (Fig. 1) was implemented to that end ● Landslide inventorying: compiling long- term landslide event records throughout the city territory, from geotechnical reports, field campaigns (especially from 2014), remote sensing image analysis; using point ...
    ... related ground instabilities (especially subsidence), but the actual motivation for a detailed study was the 2014 massive flooding and landslidng event that affected the entire region (Fig. 3). More than 500 mm was precipitated in less than a month and a half, which is more than 6 months’ worth of ...
    ... represented to illustrate all these steps and demonstrate successful implementation of complete landslide assessment (from landslide inventory to risk or early-warning system). The practical example considers the case of the City of Tuzla in Bosnia and Herzegovina, which is known for instabilities due to ...

  • Tectonothermal evolution of an asymmetric extensional system: the Juhor Mts in Central Serbia (Northern Serbomacedonian massif)

    Miloš Radonjić, Uroš Stojadinović, Elco Luijendijk, Dejan Radivojević, Željko Golubović, Nikola Vuković (2018)
    асиметрична екстензија, панонски басен, српско‐македонски масив, термохронологија
    ... Radivojević,  2012).  Recent  thermochronological  studies  in  the  SE  Serbia  and  adjacent  countries  have  inferred  that  the  peak  metamorphic  event  in  the  Serbomacedonian  unit  is  Variscan  and  that  its  magmatism  had  a  long  Paleozoic  evolution  (Antić  et  al.,  2016a).  South  of  ...

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic

  • Geomagnetna bura kategorije G5 u maju 2024. godine

    Magdalena Marčeva (2024)
    Zemlja poseduje magnetno polje, koje je generisano u njenom spoljašnjem jezgru. Magnetno polje Zemlje je konstantno izloženo dejstvu sunčevog magnetnog polja i zračenja koje se sa Sunca emituje. Naelektrisane čestice koje pristižu sa Sunca stupaju u interakciju sa magnetosferom, što dovodi do različitih geomagnetnih poremećaja.Geomagnetna aktivnost direktno je proporcionalna intenzitetu sunčevog zračenja koje dolazi do Zemlje. Pod uticajem sunčevog korpuskularnog zračenja dolazi do pojave geomagnetnih bura koje su praćene porastom intenziteta magnetnog polja.Količina i jačina dolaznog sunčevog zračenja zavisi ...
    magnetosfera, sunčevo zračenje, geomagnetna bura, indeksi geomagnetne aktivnosti, polarna svetlost
    ... geomagnetic storm watch issued for unusual solar event. URL:https://www.cbsnews.com/news/severe-geomagnetic-storm-watch- issued- unusual-solar-event/ Colorado State University. Extreme geomagnetic storm. URL: https://satlib.cira.colostate.ecdu/event/extreme-geomagnetic-storm/ Cvetkov, V., 2022 ...
    ... Nove Kaledonije, Urugvaja, južnog Brazila i Namibije (ColoradoState University. Extreme geomagnetic storm. URL: https://satlib.cira.colostate.edu/event/extreme-geomagnetic-storm/). Slika 5.3.1. 4Auroralni oval iznad severnog pola ( https://satlib.cira.colostate.edu/wp-content/uploads/sites/23/2 ...

  • Back-arc underplating provided crustal accretion affecting topography and sedimentation in the Adria microplate

    Paolo Mancinelli, Vittorio Scisciani, Cristina Pauselli, Gérard M. Stampfli, Fabio Speranza, Ivana Vasiljević (2021)
    Supported by evidence of deep crustal sources for the observed magnetic anomalies in Central Italy and by outcropping gabbros in the Croatian archipelago, we model the observed gravity and magnetic anomalies in the Central Adriatic Sea and surroundings. We suggest that the major magnetic anomalies in the area are related to a wide underplating and propose that this volume represents the first stage of the back-arc Adria continental breakup in Early Permian times. During the Palaeotethys-Adria collision, underplating has ...
    Underplating, akrecija kore, Magnetske anomalije, Jadranska ploča

  • A necessary and sufficient condition for an algebraic integer to be a Salem number

    Dragan Stankov (2019)
    We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... interpretation was based on petro observations of cuhedral pyrite and galena, which they attributed to blastic recrystal during the Cretaceous metamorphic event. This paper presents the first fluid inclusi 1 microthermometric data in an attemptto decipherthe genetic conditions ofthe Око deposit. This work is ...
    ... case study from the Cambro-Ordovician sect Sahara) using U-Pb-LA-ICP-MSdetrital zircon Linnemann, U., Gerdes, A., Hofmann, M. & Marko, L. 2 to Early Cambrian crustal growth and orogenic zonih, Авсап Стаоп—Сопзтани from U-Pb zircon ages ani Germany). - Precambrian Research, 224, 236–278. Mioč, ...

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia

    Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović (2024)
    lokalni putevi, prirodni hazardi, otpornost na klimatske promene, MaPLoRds

  • Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања

    Стефан Милановић (2024)
    Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...
    линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елемената

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... source and mobility of arsenic in groundwa- ter. Its mobility depends on the highly-complex geochemi- cal processes that take place in the aquifer. An anoxic state of groundwater increases arsenic mobility [14]. Based on a review of different literature sources, regions featuring high arsenic concentrations ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... (THoMAS, 1998, 2003, 2007). This increase in vertical gradients can lead to a decrease of the oxygen Minimum zone (oMz) and the formation of almost anoxic conditions such as those in the Black Sea or the Gulf of Mexico (joyCE, 2000). The analyses conducted on foramini - fera confirmed the similar situation ...
    ... 1998. The biography of the Late Paleocene ben- thic foraminiferal extinction. In: AUBRy, M.-P., LUCAS, S. & BERGGREN, W.A. (Eds.). late Paleocene-early Eocene bi- otic and climatic events in the marine and terrestrial records. Columbia University Press, 214–243, THoMAS, E. 2003. Extinction and food ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... source and mobility of arsenic in groundwa- ter. Its mobility depends on the highly-complex geochemi- cal processes that take place in the aquifer. An anoxic state of groundwater increases arsenic mobility [14]. Based on a review of different literature sources, regions featuring high arsenic concentrations ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations