Geodynamic and petrogenetic evolution of Alpine ophiolites from the central and NW Dinarides: an overview

Pamić, Jakob; Tomljenović, Bruno; Balen, Dražen

doi:10.1016/s0024-4937(02)00162-7

Cited by 171 publications

(102 citation statements)

References 38 publications

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“…Geology modified after Schmid et al (2008) and Marchev et al (2005) for the Rhodopes Int J Earth Sci (Geol Rundsch) Vardar branch of the Neotethys Ocean must have closed by Mid-Eocene times or earlier, in accordance with what is known from the literature (e.g. Pamić et al 2002b;Ustaszewski et al 2009, in press). Hence, it is clear that the Late Eocene to earliest Miocene magmatism is post-collisional with respect to the closure of the Vardar ocean.…”

Section: Discussion Of Data Within the Regional Geodynamic Contextsupporting

confidence: 63%

Cenozoic granitoids in the Dinarides of southern Serbia: age of intrusion, isotope geochemistry, exhumation history and significance for the geodynamic evolution of the Balkan Peninsula

Schefer¹,

Cvetković

Fügenschuh

et al. 2010

Int J Earth Sci (Geol Rundsch)

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Two age groups were determined for the Cenozoic granitoids in the Dinarides of southern Serbia by high-precision single grain U-Pb dating of thermally annealed and chemically abraded zircons: (1) Oligocene ages (Kopaonik, Drenje, Ž eljin) ranging from 31.7 to 30.6 Ma (2) Miocene ages (Golija and Polumir) at 20. 58-20.17 and 18.06-17.74 Ma, respectively. Apatite fission-track central ages, modelling combined with zircon central ages and additionally, local structural observations constrain the subsequent exhumation history of the magmatic rocks. They indicate rapid cooling from above 300°C to ca. 80°C between 16 and 10 Ma for both age groups, induced by extensional exhumation of the plutons located in the footwall of core complexes. Hence, Miocene magmatism and core-complex formation not only affected the Pannonian basin but also a part of the mountainous areas of the internal Dinarides. Based on an extensive set of existing age data combined with our own analyses, we propose a geodynamical model for the Balkan Peninsula: The Late Eocene to Oligocene magmatism, which affects the Adriaderived lower plate units of the internal Dinarides, was caused by delamination of the Adriatic mantle from the overlying crust, associated with post-collisional convergence that propagated outward into the external Dinarides. Miocene magmatism, on the other hand, is associated with core-complex formation along the southern margin of the Pannonian basin, probably associated with the W-directed subduction of the European lithosphere beneath the Carpathians and interfering with ongoing Dinaridic-Hellenic back-arc extension.

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Section: Discussion Of Data Within the Regional Geodynamic Contextsupporting

confidence: 63%

Cenozoic granitoids in the Dinarides of southern Serbia: age of intrusion, isotope geochemistry, exhumation history and significance for the geodynamic evolution of the Balkan Peninsula

Schefer¹,

Cvetković

Fügenschuh

et al. 2010

Int J Earth Sci (Geol Rundsch)

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“…According to the current geotectonic models the formation of this unit took place in a MiddleLate Jurassic back-arc-basin within the Vardar Ocean, in the northwesternmost segment of the Neo-Tethys. The recent setting in a mélange in NE-Hungary is due to the Late Jurassic/Early Cretaceous subduction/collision related accretionary prism formation, and a later, Tertiary displacement from the Dinarides along the MidHungarian Lineament [12,13,18,19]. The radiometric age of the gabbro of the Szarvaskő Unit is 166±8 Ma [20], which is comparable with the ages obtained from ophiolitic rocks of the Dinaridic Ophiolites and also partly of the Vardar Ophiolites [18,21].…”

Section: Geological Settingsupporting

confidence: 53%

Fluid inclusion studies in datolite of low grade metamorphic origin from a Jurassic pillow basalt series in northeastern Hungary

2012

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Abstract:The Jurassic pillow basalt blocks in the Szarvaskő Unit in the SW-Bükk Mountains are incorporated into an accretionary mélange of Cretaceous age which had been displaced from the Dinarides to NE-Hungary during the Alpine-Carpathian collision. The pillow basalt series is a part of an incomplete remnant of an ophiolite-like sequence from which ultramafic units and sheeted dikes are almost completely absent. At the studied Egerbakta quarry, closely packed pillow, pillow fragmented hyaloclastite breccia and peperitic facies of submarine basaltic volcanism were recognized. Peperitic facies was formed by local admixture of unconsolidated siliciclastic sediment into the basaltic lava. Basaltic pillows contains short and thin prehnite-chlorite-carbonate-quartz veins formed during the interaction of seawater with the cooling lava, as well as cross-cutting datolite-prehnite-quartzchlorite-albite bearing veins. Calcite in the short cooling cracks crystallised from upheated seawater at around 160 • C temperature and 0.5-0.6 kbar pressure (water depth of about 5-6 km). Datolite precipitations in veins can be classified into at least three different textural-morphological types but all of them contain methane bearing primary fluid inclusion assemblages, with variable methane/water ratios, suggesting an inhomogeneous entrapment from a heterogeneous aqueous-carbonic fluid. End member primary fluid inclusions contain aqueous liquid with methane rich vapour phase and apparently methane only inclusions characterized by liquid phase on room temperature. A combination of results from fluid inclusion microthermometry, Raman spectroscopy (used not only for phase identification but also for determination of salinities) and temperatures calculated from chlorite compositions, show that the precipitation of datolite had taken place from low salinity (0.2-2 NaCl equiv. mass%) aqueous-methane fluids under increasing temperature and pressure (from 160 to 210 • C, and from 0.6 to 1.1 kbar) conditions. The elevated pressures and temperatures in comparison to the submarine hydrothermal processes suggest that the datolite bearing mineral parageneses had been formed during the progression of Alpine very low grade metamorphic processes.

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“…In the territory of western Serbia, there are two belts of ophiolitic mélange overlain by large ultramafic massifs. The more external belt is known as the Dinaridic Ophiolites or Dinaridic Ophiolite Belt (Pamić et al 2002;Karamata 2006) or as the Central Dinaridic Ophiolite belt (Lugović et al 1991). The more internal belt is referred to as the Vardar Zone Western Belt by Karamata (2006), but also referred to under a variety of names such as Inner Dinaridic ophiolite belt (Lugović et al 1991), External Vardar Subzone (Dimitrijević 1997(Dimitrijević , 2001 or simply Vardar Zone (Pamić et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Early Senonian radiolarian microfauna and biostratigraphy from the Western Vardar Zone (Western Serbia)

Djerić¹,

Gerzina²,

Gajić³

et al. 2009

Geologica Carpathica

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Abstract:The studied deposits represent the sedimentary cover of ophiolitic mélange of the Western Vardar Zone Belt. An association of sediments that correspond to a primary pyroclastic material occurs in the Upper Cretaceous carbonate sediments near the village of Struganik (Western Serbia). This is an interlayer within mainly carbonate sediments represented by limestone, clayey limestone and marlstone. It is made of the following succession: a lamina made of crystalline quartz, sanidine, plagioclase and biotite and a layer of clay. The clay is of the smectite type, highly crystalline. The age of the radiolarian assemblage from the clay layer is assigned to Early Senonian, based on the co-occurrence of radiolarian taxa: Dictyomitra formosa Squinabol, Dictyomitra koslovae Foreman, Dictyomitra torquata Foreman, Alievium sp. cf. A. superbum (Squinabol) and Pseudoaulophacus sp. cf. P. venadoensis Pessagno. The pyroclastic material was brought into the water environment by a cloud that was formed after an explosive eruption whose exact location cannot be determined at the moment. According to geological data, there are no indications of volcanic activity before the Late Cretaceous in the wider studied area. Marine sedimentation continued after gravitational differentiation of pyroclastic material. The results of petrological and sedimentological investigations reveal that Struganik Limestone originated in a deep-water environment and that the sedimentation area was on the continental slope.

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Geodynamic and petrogenetic evolution of Alpine ophiolites from the central and NW Dinarides: an overview

Cited by 171 publications

References 38 publications

Cenozoic granitoids in the Dinarides of southern Serbia: age of intrusion, isotope geochemistry, exhumation history and significance for the geodynamic evolution of the Balkan Peninsula

Cenozoic granitoids in the Dinarides of southern Serbia: age of intrusion, isotope geochemistry, exhumation history and significance for the geodynamic evolution of the Balkan Peninsula

Fluid inclusion studies in datolite of low grade metamorphic origin from a Jurassic pillow basalt series in northeastern Hungary

Early Senonian radiolarian microfauna and biostratigraphy from the Western Vardar Zone (Western Serbia)

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