Petrology and geotectonic significance of salic rocks preceding ophiolites in the Eastern Vardar Zone, Greece

1986 ◽  
Vol 35 (4) ◽  
pp. 217-242 ◽  
Author(s):  
K. Mussallam ◽  
D. Jung
Keyword(s):  
Vardar Zone

scholarly journals Tertiary plutonic rocks of southern Serbia Vardar Zone as dimension stone

2014 ◽  
pp. 85-92
Author(s):  
Lidja Kuresevic ◽  
Vladimir Simic
Keyword(s):  
Field Study ◽  
Laboratory Testing ◽  
Dimension Stone ◽  
Vardar Zone ◽  
Technical Requirements ◽  
Large Size ◽  
Geological Factors ◽  
Laboratory Examinations ◽  
Technical Properties ◽  
Plutonic Rocks

Three granitoid plutons of south-Serbian part of the Vardar Zone, of Tertiary age were studied in order to establish their potential for utilization as dimension stone. These rocks vary in composition from quartzmonconite to quartzdiorite. Field study aimed at establishing the geological factors - presence of fractures, harmful minerals, alterations, jointing type and fabric homogeneity in order to determine the possibility of obtaining large size blocks of stone from the plutons. Laboratory examinations comprised petrological analyses and testing of technical properties. Stone from these plutons has shown favourable results in both field and laboratory examinations. Evaluation of the rock based on obtained laboratory testing results is performed according to technical requirements of the Serbian standard B.B3.200. It has shown that rocks from these plutons can be used as dimension stone for the production of slabs for the exterior and interior paving and cladding.

scholarly journals The age of the brachiopod limestones from Guca, western Serbia

2010 ◽  
pp. 73-93 ◽  
Author(s):  
Rajka Radoicic ◽  
Vladan Radulovic ◽  
Dragoman Rabrenovic ◽  
Barbara Radulovic
Keyword(s):  
Planktonic Foraminifera ◽  
Western Tethys ◽  
Vardar Zone ◽  
Large Distribution

The asymmetric rhynchonellide brachiopod Cyclothyris? globata (ARNAUD, 1877) has a large distribution in the Coniacian, Santonian and Campanian outcrops of the western Tethys. The species has also been identified in Guca, (Vardar Zone, western Serbia), where it occurs together with the capillate terebratuloid ?Terebratula? sp. (gen. et sp. nov.). In addition to Serbia, this brachiopod association is found in many localities of northeastern Bulgaria (Shumen Formation). In older literature, in Romania and Bulgaria, ?Terebratula? sp. (gen. et sp. nov.) was confused with the Late Maastrichtian Terebratulina striata (WAHLENBERG, 1821). The present microfaunal study based on planktonic foraminifera showed that the age of the beds with Cyclothyris? globata and ?Terebratula? sp. (gen. et sp. nov.) in Guca may be dated as Lowermost Campanian, i.e., the Santonian/Campanian boundary.

2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys

2020 ◽  
Author(s):  
Nikola Stanković ◽  
Vesna Cvetkov ◽  
Vladica Cvetković
Keyword(s):  
Numerical Simulations ◽  
Late Cretaceous ◽  
Stokes Equations ◽  
Numerical Models ◽  
Upper Jurassic ◽  
Staggered Grid ◽  
Parameter Study ◽  
Ongoing Research ◽  
Magmatic Complex ◽  
Vardar Zone

<p>In this study we report interim results of our ongoing research that involves the application of numerical modeling for constraining the geodynamic conditions associated with the closure of the Vardar branch of the Tethys Ocean. The study is aimed at better understanding the ultimate fate of the Balkan ophiolites, namely at addressing the question whether these ophiolites represent relicts of an ocean that completely closed during Upper Jurassic/lowermost Cretaceous time (Vardar Tethys) or they also contain remnants of the ocean floor of a Late Cretaceous oceanic realm (Sava – Vardar) [Schmid et al., 2008].</p><p>In our numerical models we try to simulate a single intraoceanic subduction that commences in the Lower/Mid Jurassic and ends in the Lower Cretaceous, transitioning into oceanic closure processes and subsequent collision between Adria and Eurasia plates. These convergent-collision events should have led to the formation of ophiolite-like igneous rocks of the so-called Sava - Vardar zone.</p><p>A series of numerical simulations were performed with varying parameters. In the scope of our numerical simulations, the set of equations is solved: the continuity equation, the Navier-Stokes equations and the temperature equation. Marker in cell method was incorporated in solving this system with finite difference discretization of the equations on a staggered grid. To utilize this numerical method a thermo-mechanical code I2VIS [Gerya et al., 2000; Gerya & Yuen, 2003] was used for obtaining the final results. </p><p>Our actual 2D thermo-mechanical models cover the crust and the upper portion of the mantle with varying starting widths of the Vardar Ocean in the Lower Jurassic. The ocean is modeled with two segments: the western subducting slab and the eastern overriding slab. Slabs with different ages and thicknesses were used and the convergence rate is varied. The intraoceanic subduction is assumed to have been initiated along the mid oceanic ridge. Two continents (i.e. Adria and Eurasia) with different thicknesses of the continental lithosphere and crust are also modeled adjacent to a single oceanic realm between them.</p><p>The parameter study is in function of defining conditions under which the hypothesized scenario occurs. So far, we have succeeded in reproducing westward obduction onto the Adriatic margin, which is in accordance with the geological observations, i.e., with the top-west emplaced West Vardar ophiolites [see Schmid et al., 2008 for references]. However, our model is yet to produce sufficient amounts of back-arc extension along the Eurasian active margin and that is crucial for explaining the formation of the igneous provinces occurring within the Late Cretaceous Sava – Vardar zone and the Timok Magmatic Complex.</p>

Alpine tectono-metamorphic history of the continental units from Vardar zone: the Kopaonik Metamorphic Complex (Dinaric-Hellenic belt, Serbia)

2010 ◽  
Vol 45 (1) ◽  
pp. 59-77 ◽  
Author(s):  
Mario Zelic ◽  
Nicola Levi ◽  
Alessandro Malasoma ◽  
Michele Marroni ◽  
Luca Pandolfi ◽  
...  
Keyword(s):  
Metamorphic Complex ◽  
Vardar Zone ◽  
Metamorphic History ◽  
History Of

Ardennite in a high-P/T meta-conglomerate near Vitolište in the westernmost Vardar zone, Republic of Macedonia

2017 ◽  
Vol 29 (3) ◽  
pp. 473-489 ◽  
Author(s):  
Rainer Altherr ◽  
Christian Soder ◽  
Hans-Peter Meyer ◽  
Thomas Ludwig ◽  
Marcel Böhm
Keyword(s):  
Republic Of Macedonia ◽  
Vardar Zone

scholarly journals Reconsidering paleozoic differences between the Jadar block and the Drina-Ivanjica unit

2020 ◽  
Vol 81 (1) ◽  
pp. 1-9
Author(s):  
Darko Spahic ◽  
Tivadar Gaudenyi
Keyword(s):  
Oceanic Crust ◽  
Late Jurassic ◽  
Temporal Evolution ◽  
Ocean Model ◽  
Passive Margin ◽  
Late Paleozoic ◽  
Vardar Zone ◽  
Geographic Position ◽  
Tentative Evidence

The peculiar Jadar block has an intervening position separating the main Neotethyan West Vardar Zone (including ophiolites of Late Jurassic age) and a passive margin lithospheric segment of the Apulia/Adria microplate referred to as the Drina-Ivanjica block. The review aimed to reassess the peri- Neotethyan paleogeography affecting the evolution of the Neotethyan oceanic crust (?single? vs. ?multiple oceans? or single- vs. two ophiolite belts) by juxta - posing the key differences of the late Variscan temporal evolution (controlling early Alpine paleogeography) between the Jadar block and Drina?Ivanjica crystalline segment. The study goal is the questionable paleogeographic affinity of the Jadar block. Contrary to the recent inferences attributing the Jadar block as a segment of the Apulia/Adria microplate, the study examine whether and how the Jadar Late Paleozoic succession may allow for an alter - native paleogeographic solution of the Neotethyan relevance. According to this comparison survey of these late Paleozoic successions, it appears that the Jadar block may carry a (tentative) evidence of the proximity of the western Paleotethys. The comparison yields a putative paleogeographic position as - sociating the Jadar block with the post-Variscan European margin (not ?pulia/Adria microplate). The proposed shift of the Permian-Triassic paleo - geographic position of the Jadar block inevitably affects the obduction length i.e. questions a favourable protracted along strike-width of the overriding Neotethyan West Vardar ophiolites (?single ocean model?).

scholarly journals Trans-border (east Serbia/west Bulgaria) correlation of the morpho-tectonic structures

2011 ◽  
pp. 21-27 ◽  
Author(s):  
Platon Tchoumatchenco ◽  
Dragoman Rabrenovic ◽  
Vladan Radulovic ◽  
Barbara Radulovic ◽  
Nenad Malesevic
Keyword(s):  
Tectonic Structures ◽  
Vardar Zone ◽  
Moesian Platform

In the Bulgarian and Serbian geological literatures, many maps, both geological and tectonic, exist showing the structures, but limiting them nationally. There are very few publications correlating the structures from both sides of the border and they preserve the local Bulgarian or Serbian names. Our aim is to create a base for the unification of the names defining the major morpho-tectonic structures: the Moesian Platform, the Miroc - Fore-Balkan Unit, the Porec-Stara Planina Unit, the Krayna Unit, the Getic - Srednogorie Unit, the Supra Getic - Kraishtide Zone, the Serbo-Macedonian - Thracian Massif and the Vardar Zone, showing their synonyms from the Bulgarian and Serbian sides.

The westernmost Late Miocene-Pliocene volcanic activity in the Vardar Zone (North Macedonia) – geochronology, petrology and geochemistry of Pakoševo, Debrište and Šumovit Greben volcanic centers

2020 ◽  
Author(s):  
Kata Molnár ◽  
Stéphane Dibacto ◽  
Pierre Lahitte ◽  
Marjan Temovski ◽  
Samuele Agostini ◽  
...  
Keyword(s):  
Late Miocene ◽  
Isotopic Ratio ◽  
Crustal Contamination ◽  
Sedimentary Basins ◽  
Geochemical Data ◽  
Large Area ◽  
Quaternary Volcanism ◽  
Horizon 2020 ◽  
Vardar Zone ◽  
Wide Range

<p>Late Miocene to Pleistocene volcanism within the Vardar zone (North Macedonia) covers a large area, has a wide range in composition and it is largely connected to the tectonic evolution of the South Balkan extensional system, the northern part of the Aegean extensional regime. The scattered potassic to ultrapotassic volcanism developed south from the Scutari-Peć fault zone since 6.57 Ma [1]. The focus of this study is on three volcanic centers located on deep structures or thrust faults along the western part of the Vardar zone, for which there is none to very little geochronological and geochemical data available. Pakoševo and Debrište localities are represented as small remnants of lava flows cropping out at the southern edge of Skopje basin and at the western edge of Tikveš basin, respectively. Šumovit Greben center is considered as part of the Kožuf-Kozjak/Voras massif (6.5-1.8 Ma [1]), and it is located on its westernmost side, at the southern edge of Mariovo basin, which is largely comprised of volcanoclastic sediments. Here we present new eruption ages applying the unspiked Cassignol-Gillot K-Ar technique on groundmass, petrological and geochemical data, supplemented with Sr and Nd isotopes to complement and better understand the Neogene-Quaternary volcanism in the region. Obtaining the eruption ages of these volcanic centers could also help to better constrain the evolution of the sedimentary basins. All of the three centers belong to the shoshonitic series based on their elevated K-content. The oldest center amongst these three localities, as well as other Late Miocene centers within the region, is the trachyandesitic Debrište, which formed at ca. 8.1 Ma, and exhibits the highest Nd isotopic ratios (0.512441-0.512535). The trachybasaltic Pakoševo center formed at ca. 3.8 Ma and, based on its Nd isotopic ratio (0.512260), represents the strongest sign of crustal contamination. The rhyolitic Šumovit Greben center is a composite volcanic structure formed at ca. 3.0-2.7 Ma. Its youngest eruption unit has a slightly larger Nd isotopic ratio (0.512382), representing a less evolved magma at the end of its activity.</p><p>This research was funded by the GINOP-2.3.2-15-2016-00009 ‘ICER’ project, the French-Hungarian Cooperation Program TÉT-FR-2018-00018 and the HORIZON 2020 grant N 676564.</p><p>References:</p><p>[1] Yanev et al., 2008 – Mineralogy and Petrology, 94(1-2), 45-60.</p>

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