Neogene–Quaternary magmatism and geodynamics in the Carpathian–Pannonian region: a synthesis

Seghedi, Ioan; Downes, Hilary; Szakács, Alexandru; Mason, Paul R.D.; Thirlwall, M. F.; Rosu, E.; Pécskay, Zoltán; Márton, Emő; Panaiotu, Cristian

doi:10.1016/j.lithos.2003.08.006

Cited by 251 publications

(252 citation statements)

References 67 publications

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“…9), Koroneos et al (2010) and Cvetković et al (2007b) proposed emplacement during the early stages of extension related to the formation of the Pannonian basin, the Bukulja intrusion being located in the footwall of a major core complex exhumed in early Miocene times (Marović et al 2007). Hence, the location of these S-type granites at the southern margin of the Pannonian basin, their Early Miocene age, and their association with core complex formation all argue for them being located in the backarc area of the W-directed subduction of the European lithosphere beneath the Carpathians, widely invoked to explain extension and magmatism in the main part of the Pannonian basin (Csontos 1995;Seghedi et al 2004). However, the locations of the Miocene S-type granitoids of the Inner Dinarides also come to lie into within the Late Eocene to earliest Miocene ([22 Ma) belt of predominantly I-type granitoids.…”

Section: Discussion Of Data Within the Regional Geodynamic Contextmentioning

confidence: 99%

“…The distribution of the Neogene magmatic rocks within the Alpine-CarpathianPannonian-Dinaridic region, on the other hand, is by far more dispersed, many but by no means all of them being related to subduction in the Carpathians and the contemporaneous opening of the Pannonian basin (e.g. Seghedi et al 2004). Only rarely is the Neogene magmatic activity spatially associated with Paleogene precursors, such as in the Pohorje region of Slovenia (Trajanova et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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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 Contextmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…Volcanic and/or intrusive activity took place since 21 Ma till 0.1 Ma with a distinct migration in time from west to east ( Figure 2). Volcanic forms show diverse compositions that were generated in response to complex syn-and post-collisional tectonic processes [1,2] involving subduction with roll-back, collision, slab breakoff, delamination, strike-slip tectonics and block rotations of two microplates [4][5][6][7]. Major groups of calc-alkaline rock-types (felsic, intermediate and mafic varieties) have been distinguished and several minor alkalic types also pointed out, including K-alkalic, shoshonitic, ultrapotassic and Na-alkalic.…”

Section: Geotectonic Settingmentioning

confidence: 99%

“…Reviews have been published treating the space/time evolution of volcanic activity [1,2], geotectonic evolution [3] and petrology and geodynamic setting of volcanic activity [4][5][6][7]. That is the reason that these subjects are covered only in the extent necessary for a proper understanding of volcanic form presentation.…”

Section: Introductionmentioning

confidence: 99%

Neogene-Quaternary Volcanic forms in the Carpathian-Pannonian Region: a review

et al. 2010

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Neogene to Quaternary volcanic/magmatic activity in the Carpathian-Pannonian Region (CPR) occurred between 21 and 0.1 Ma with a distinct migration in time from west to east. It shows a diverse compositional variation in response to a complex interplay of subduction with roll-back, back-arc extension, collision, slab break-off, delamination, strike-slip tectonics and microplate rotations, as well as in response to further evolution of magmas in the crustal environment by processes of differentiation, crustal contamination, anatexis and magma mixing. Since most of the primary volcanic forms have been affected by erosion, especially in areas of post-volcanic uplift, based on the level of erosion we distinguish: (1) areas eroded to the basement level, where paleovolcanic reconstruction is not possible; (2) deeply eroded volcanic forms with secondary morphology and possible paleovolcanic reconstruction; (3) eroded volcanic forms with remnants of original morphology preserved; and (4) the least eroded volcanic forms with original morphology quite well preserved. The large variety of volcanic forms present in the area can be grouped in a) monogenetic volcanoes and b) polygenetic volcanoes and their subsurface/intrusive counterparts that belong to various rock series found in the CPR such as calc-alkaline magmatic rock-types (felsic, intermediate and mafic varieties) and alkalic types including K-alkalic, shoshonitic, ultrapotassic and Na-alkalic. The following volcanic/subvolcanic forms have been identified: (i) domes, shield volcanoes, effusive cones, pyroclastic cones, stratovolcanoes and calderas with associated intrusive bodies for intermediate and basic calc-alkaline volcanism; (ii) domes, calderas and ignimbrite/ash-flow fields for felsic calc-alkaline volcanism and (iii) dome flows, shield volcanoes, maars, tuffcone/tuff-rings, scoria-cones with or without related lava flow/field and their erosional or subsurface forms (necks/ plugs, dykes, shallow intrusions, diatreme, lava lake) for various types of K-and Na-alkalic and ultrapotassic magmatism. Finally, we provide a summary of the eruptive history and distribution of volcanic forms in the CPR using several sub-region schemes.

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“…The studied volcano is situated at the junction between the Codru-Moma and Highiș-Drocea Mts., at the tectonic boundary between the South and North Apuseni tectonic units (see inset Figure 1) [4][5][6]. An extensional regime in the Apuseni area during Middle Miocene time [4,7,8] was responsible for magma generation due to decompression melting of upper lithosphere/lower crust during eastward translation and clockwise rotation of the Intra-Carpathian blocks [1,[9][10][11]. This was probably coupled to asthenosphere upwelling and a higher thermal regime favoring partial melting and mixing processes [1,11].…”

Section: Introductionmentioning

confidence: 99%

Note on the evolution of a Miocene composite volcano in an extensional setting, Zârand Basin (Apuseni Mts., Romania)

Seghedi

Szakács²,

Rosu

et al. 2010

Open Geosciences

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Bontǎu is a major eroded composite volcano filling the Miocene Zǎrand extensional basin, near the junction between the Codru-Moma and Highiș-Drocea Mountains, at the tectonic boundary between the South and North Apuseni Mountains. It is a quasi-symmetric structure (16-18 km in diameter) centered on an eroded vent area (9×4 km), buttressed to the south against Mesozoic ophiolites and sedimentary deposits of the South Apuseni Mountains. The volcano was built up in two sub-aerial phases (14-12.5 Ma and 11-10 Ma) from successive eruptions of andesite lava and pyroclastic rocks with a time-increasing volatile budget. The initial phase was dominated by emplacement of pyroxene andesite and resulted in scattered individual volcanic lava domes associated marginally with lava flows and/or pyroclastic block-and-ash flows. The second phase is characterized by amphibole-pyroxene andesite as a succession of pyroclastic eruptions (varying from strombolian to subplinian type) and extrusion of volcanic domes that resulted in the formation of a central vent area. Numerous debris flow deposits accumulated at the periphery of primary pyroclastic deposits. Several intrusive andesitic-dioritic bodies and associated hydrothermal and mineralization processes are known in the volcano vent complex area. Distal epiclastic deposits initially as gravity mass flows and then as alluvial volcaniclastic and terrestrial detritic and coal filled the basin around the volcano in its western and eastern part. Chemical analyses show that lavas are calc-alkaline andesites with SiO 2 ranging from 56-61%. The petrographical differences between the two stages are an increase in amphibole content at the expense of two pyroxenes (augite and hypersthene) in the second stage of eruption; CaO and MgO contents decrease with increasing SiO 2 . In spite of a ∼4 Ma evolution, the compositions of calc-alkaline lavas suggest similar fractionation processes. The extensional setting favored two pulses of short-lived magma chamber processes. Note on the evolution of a Miocene composite volcano in an extensional setting, Zǎrand Basin (Apuseni Mts., Romania) Keywords IntroductionIn the Apuseni Mountains, Neogene magmatism produced four NW-SE volcano-intrusive areas [1], between 14.7 to 7.4 Ma and ended with a brief small-volume eruption at ∼1.6 Ma (Uroi) [1][2][3]. The studied volcano is situated at the junction between the Codru-Moma and Highiș-Drocea Mts., at the tectonic boundary between the South and North Apuseni tectonic units (see inset Figure 1) [4][5][6]. An extensional regime in the Apuseni area during Middle Miocene time [4,7,8] was responsible for magma generation due to decompression melting of upper lithosphere/lower crust during eastward translation and clockwise rotation of the Intra-Carpathian blocks [1,[9][10][11]. This was probably coupled to asthenosphere upwelling and a higher thermal regime favoring partial melting and mixing processes [1,11]. The largest continuous volcanic area is ca. 100 km across and developed mainly in the Zǎrand dep...

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Neogene–Quaternary magmatism and geodynamics in the Carpathian–Pannonian region: a synthesis

Cited by 251 publications

References 67 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

Neogene-Quaternary Volcanic forms in the Carpathian-Pannonian Region: a review

Note on the evolution of a Miocene composite volcano in an extensional setting, Zârand Basin (Apuseni Mts., Romania)

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