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Belgrade, Serbia

Sudar M.N.,University of Belgrade | Gawlick H.-J.,University of Leoben | Lein R.,University of Vienna | Missoni S.,University of Leoben | And 2 more authors.
Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen | Year: 2013

Below the Middle to lower Upper Jurassic ophiolitic mélange and their overlying ophiolite nappes of the Dinaridic Ophiolite Belt in the Zlatibor Mountain area occur olistoliths and slideblocks. These consist of Triassic carbonates and radiolarites of variable age and palaeogeographic provenance. The matrixes of these blocks are late Middle Jurassic radiolarites and clays. The different carbonate rocks were commonly interpreted to derive from the near-by Drina-Ivanjica Unit. In contrast, the radiolarites should represent the original sedimentary cover of the ophiolitic rocks of the Dinaridic Ophiolite Belt, i.e. the obducted oceanic crust of the Neotethys Ocean, originally located far to the east. The carbonate blocks in the Zlatibor (Sirogojno) mélange reach several tens to hundreds of metres in size, occasionally even kilometres. Several olistoliths and blocks contain well-preserved parts of the Middle Triassic sedimentary succession. Their stratigraphy and facies evolution allowed the reconstruction of a sedimentary succession originating from the same palaeogeographic provenance of a relatively proximal passive continental margin setting, located originally east of the Drina-Ivanjica Unit. Different red nodular limestones of the Bulog Formation were deposited on top of a drowned Middle Anisian (Pelsonian) shallow-water carbonate ramp; beside condensed sections of red nodular limestones equal-aged thick successions with megabreccias occur, indicating the creation of steep fault escarpments and rapid subsidence. In contrast to this continuous sedimentary succession, Triassic sections of the relatively autochthonous Drina-Ivanjica Unit indicate Late Pelsonian uplift of the Middle Anisian carbonate ramp. After a hiatus (Late Pelsonian to Early Illyrian), deposition of grey cherty limestones with shallow-water debris (newly described as Rid Formation) started in the Middle to Late Illyrian. The focus of this paper is on the age, the depositional environment and the facies characteristics of the Late Anisian hemipelagic successions. Based on this study it is concluded that in the Inner Dinarides domain the Middle Anisian Neotethyan break-up resulted in the generation of a horst-and-graben topography. Blocks were uplifted in a rift shoulder manner and asymmetric basins were formed. Mass flows and slide blocks were mobilized along normal faults of the evolving western passive continental margin of the Neotethys Ocean. © 2013 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany. Source

Pantic T.P.,Geological Survey of Serbia | Birke M.,Federal Institute for Geosciences and Natural Resources | Petrovic B.,University of Belgrade | Nikolov J.,University of Novi Sad | And 2 more authors.
Journal of Geochemical Exploration | Year: 2015

Geochemical exploration has been applied for studying thermal groundwater characteristics in the Serbian crystalline core region. Within this hydrogeological region, thermal groundwater with temperature higher than 20. °C occurs at seven locations. The maximum discharge temperature of the thermal groundwater is 105. °C which is the highest groundwater temperature encountered in Serbia. Geothermal reservoirs are present within andesite, schist, grus (the fragmental products of in-situ granular disintegration granite), marl and sandstone.Based on the concentrations of the major elements all of the water samples are of HCO3-Na to SO4-Na type. An elevated content of F, B, Ge and Rb is observed, while some samples also exhibit higher concentrations of As, Be, Cs, Ga, Ge, Li, V and W, and one has elevated concentrations of Nb, Zr and heavy rare earth elements (HREE). The groundwater is neutral to alkaline with TDS of 130-3822mg/L.Making use of various geothermometers, it was estimated that the temperatures in the selected aquifers of the Serbian crystalline core range from 45 to 146. °C.Activity concentration of 222Rn ranges from 10.4±0.9 to 104±15Bq/L and is higher in groundwater that is in contact with schist and along faults, while 226Ra has a smaller activity concentrations, within the range of 0.21±0.09 to 0.48±0.18Bq/L. © 2015 Elsevier B.V. Source

Miladinovic B.,Geological Survey of Serbia | Vakanjac V.R.,University of Belgrade | Bukumirovic D.,Stavalj Coal Mine | Dragisic V.,University of Belgrade | Vakanjac B.,Singidunum University
Archives of Mining Sciences | Year: 2015

The inflow of mine water to mining operations is often caused by random events such as precipitation. Consequently, the mine water inflow regime can be defined as a function of random events applying the theory of random processes. Regression models of the multiple linear correlation type have been used to simulate the inflow of mine water into mining operations, produce short-range predictions and facilitate rapid response inside the mine. The significance of such models lies in the ability to simulate and predict the consequences (mine water inflow), caused by events of a random nature (meteorological parameters: precipitation and air temperature). The presented prognostic models have been calibrated for mine water inflow to the Štavalj Coal Mine in southwestern Serbia. Mathematical dependencies were defined based on daily mine water inflow rates recorded during the period from 2003 to 2011, which can be used to generate short-range (1-7 day) predictions of mean daily mine water inflow rates to the Štavalj Coal Mine. A strong correlation (coefficient of correlation r = 0.93, Sig. = 0.00) was derived for the one-day forecast. The coefficients of correlation for predictions of mean daily mine water inflow rates related to time periods of two, three...seven days gradually declined to 0.63 (7-day mean daily inflow rate). © 2015 Archives of Mining Sciences. Source

Djokanovic S.,Geological Survey of Serbia | Abolmasov B.,University of Belgrade | Jevremovic D.,University of Belgrade
Bulletin of Engineering Geology and the Environment | Year: 2016

Landfill site selection is a complex process because it requires knowledge about a large number of criteria, parameters, and regulations. The aim of this study was to describe a methodology for landfill site selection and relevant criteria from a geological engineering point of view. To determine landfill suitability in the municipality of Pančevo, Serbia, we used the geographic information system (GIS) and analytical hierarchical method (AHP). Seven criteria and eighteen subcriteria are discussed, compared, and evaluated. The final map was obtained by overlaying and is reclassified into four classes: unsuitable, poorly suitable, moderately suitable, and most suitable. The results obtained show that 62.31 % of locations are unsuitable, 13.49 % are poorly suitable, 12.08 % are moderately suitable, and 12.12 % are most suitable. The analysis revealed geological engineering criteria as the most important, followed by hydrogeological and hydrological criteria. Geomorphological criteria were the least important. © 2016 Springer-Verlag Berlin Heidelberg Source

Kovacevic J.,Geological Survey of Serbia | Todorovic M.,University of Belgrade | Cuk M.,University of Belgrade | Papic P.,University of Belgrade
Carpathian Journal of Earth and Environmental Sciences | Year: 2016

This paper research the newly-discovered U, Th-REE mineralization in Jurassic sediments in Eastern Serbia, Carpatho-Balkanides geotectonic unit-Plavna granitoid. During 2009-2013 research was conducted using a range of geological and hydrogeological methods for geochemical and petrographical analyses of rocks. It was found that uranium mineralization occurs in breccia-conglomerates of continental facies, while Th-REE mineralization is located in quartz sandstones without organic matter (marine facies). Mineralized sediment levels are distinguished according to grain sizes and the presence of organic material, which had an important role in the deposition of uranium. The major uranium minerals were uraninite (pitchblende), coffinite, and urano-organic complexes. Electron microprobe analysis (EMPA) showed that monazite crystals vary in shape and typically are lower than 50 μm in size. The ICP ME-MS81 results of 209 geochemical samples revealed a wide range of U, Th and REE concentrations. The median U concentration was found to be 6 ppm, while maximum concentrations were over 1000 ppm. The median Th concentration was 19 ppm, while maximum was over 1000 ppm. Samples showed REE contents in the range of 14.94 ppm to 10125.86 ppm. Their chondrite-normalized REE patterns are steeply right-inclined with similar slopes, with strong LREE/HREE partitioning [(La/Yb)n=1.35-218.2)], and weak to high Eu depletion (δEu=1.26-0.04). Detailed hydrochemical investigations in the area of the Jurassic sediments have shown that the groundwaters are low-mineralized, with neutral pH values, and redox values between 0.075 V and 0.437 V. A high level of uranium was found in a borehole (48.8 μg/L), while Th concentrations were low in all samples (0.00025 - 0.039 μg/L). The sum of REE concentrations in the groundwater ranged from 10.01 to 308.87 ng/L. Hydrochemical research had aim to determine the chemical composition of groundwater in the study area. Source

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