Magmatic constraints on geodynamic models of subduction in the East Carpathians, Romania

Mason, Paul R.D.; Seghedi, Ioan; Szakács, Alexandru; Downes, Hilary

doi:10.1016/s0040-1951(98)00167-x

Cited by 116 publications

(97 citation statements)

References 61 publications

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“…the carpathian embayment was formerly underlain, according to most authors (e.g. balla 1982; Mason et al 1998), at least partly by oceanic lithosphere. subduction and slab retreat (e.g.…”

Section: Implications Regarding the Present-day Lithosphere-scale Conmentioning

confidence: 99%

A map-view restoration of the Alpine-Carpathian-Dinaridic system for the Early Miocene

Ustaszewski

Schmid

Fügenschuh

et al. 2008

Orogenic Processes in the Alpine Collision Zone

131

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A map-view palinspastic restoration of tectonic units in the Alps, carpathians and Dinarides reveals the plate tectonic configuration before the onset of Miocene to recent deformations. Estimates of shortening and extension from the entire orogenic system allow for a semi-quantitative restoration of translations and rotations of tectonic units during the last 20 Ma. Our restoration yielded the following results: (1) the balaton Fault and its eastern extension along the northern margin of the Mid-Hungarian Fault Zone align with the Periadriatic Fault, a geometry that allows for the eastward lateral extrusion of the Alpine-carpathian-Pannonian (ALcAPA) Mega-Unit. the Mid-Hungarian Fault Zone accommodated simultaneous strike-perpendicular shortening and strike-slip movements, concomitant with strike-parallel extension. (2) the Mid-Hungarian Fault Zone is also the locus of a former plate boundary transforming opposed subduction polarities between Alps (including Western carpathians) and Dinarides. (3) the ALcAPA Mega-Unit was affected by 290 km extension and fits into an area W of present-day budapest in its restored position, while the tisza-Dacia Mega-Unit was affected by up to 180 km extension during its emplacement into the carpathian embayment. the displacement of the Adriatic Plate indenter led to a change in subduction polarity along a transect through the easternmost Alps and to substantial Neogene shortening in the eastern southern Alps and external Dinarides. While we confirm that slab-pull and rollback of oceanic lithosphere subducted beneath the carpathians triggered back-arc extension in the Pannonian basin and much of the concomitant folding and thrusting in the carpathians, we propose that the rotational displacement of this indenter provided a second important driving force for the severe Neogene modifications of the Alpinecarpathian-Dinaridic orogenic system.

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“…the carpathian embayment was formerly underlain, according to most authors (e.g. balla 1982; Mason et al 1998), at least partly by oceanic lithosphere. subduction and slab retreat (e.g.…”

Section: Implications Regarding the Present-day Lithosphere-scale Conmentioning

confidence: 99%

A map-view restoration of the Alpine-Carpathian-Dinaridic system for the Early Miocene

Ustaszewski

Schmid

Fügenschuh

et al. 2008

Orogenic Processes in the Alpine Collision Zone

131

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“…In the southern part of the East Carpathians, the stress field changed in Pliocene (~5 Ma) times to a NNE-SSW to N-S contraction, coeval with large-scale slabbreakoff and tearing in the southern part of the East Carpathians (Mason et al, 1998;Maţenco & Bertotti, 2000). Breakoff and tearing of the slab at shallow levels (<50 km) in the extreme south of the arc and strike-slip tectonics, accompanied by an extensional stress regime at the surface of the upper plate (Gîrbacea & Frisch, 1998;Ciulavu, 1998;Maţenco & Bertotti, 2000), caused contemporaneous eruption of adakite-like calc-alkaline, shoshonitic and alkalic basaltic magmas (Mason et al, 1998;Seghedi et al, 2004).…”

Section: Geotectonic Backgroundmentioning

confidence: 99%

“…Breakoff and tearing of the slab at shallow levels (<50 km) in the extreme south of the arc and strike-slip tectonics, accompanied by an extensional stress regime at the surface of the upper plate (Gîrbacea & Frisch, 1998;Ciulavu, 1998;Maţenco & Bertotti, 2000), caused contemporaneous eruption of adakite-like calc-alkaline, shoshonitic and alkalic basaltic magmas (Mason et al, 1998;Seghedi et al, 2004).…”

Section: Geotectonic Backgroundmentioning

confidence: 99%

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review

Seghedi¹,

et al. 2004

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Mafic alkalic volcanism was widespread in the Carpathian Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was waning. Several groups of mafic alkalic rocks from different regions within the CPR have been distinguished on the basis of ages and/or trace-element compositions. Their trace element and Sr-Nd-Pb isotope systematics are consistent with derivation from complex mantle source regions, which included both depleted asthenosphere and metasomatized lithosphere. The mixing of DMM-HIMU-EMII mantle components within asthenosphere-derived magmas indicates variable contamination of the shallow asthenosphere and/or thermal boundary layer of the lithosphere by a HIMU-like component prior to and following the introduction of subduction components.Various mantle sources have been identified: Lower lithospheric mantle modified by several ancient asthenospheric enrichments (source A); Young asthenospheric plumes with OIB-like trace element signatures that are either isotopically enriched (source B) or variably depleted (source C); Old upper asthenosphere heterogeneously contaminated by DM-HIMU-EMII-EMI components and slightly influenced by Miocene subduction-related enrichment (source D); Old upper asthenosphere heterogeneously contaminated by DM-HIMU-EMII components and significantly influenced by Miocene subduction-related enrichment (source E). Melt generation was initiated either by: (i) finger-like young asthenospheric plumes rising to and heating up the base of the lithosphere (below the Alcapa block), or (ii) decompressional melting of old asthenosphere upwelling to replace any lower lithosphere or heating and melting former subducted slabs (the Tisia block).

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“…1) formed in response to the Alpine evolution of several continental blocks (Apulia, Adria, ALCAPA, Tisza, Dacia, as well as the European-Scythian-Moesian Platforms and the Anatolia block) separated by Tethysian oceanic branches. According to recent papers on tectonics, exhumation, and volcanism (Morley 1996;Bădescu 1997;Mason et al 1998;Hippolyte et al 1999;Sanders et al 1999; Ma enco Seghedi et al 2004;Golonka et al 2006;Gröger et al 2008;Schmid et al 2008;Merten et al 2010;Márton et al 2011) these blocks have drifted and collided since the Cretaceous, with a progressive reorientation of convergence directions (Mann 1997).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The post-Cretaceous geodynamic evolution of the study area should be closely related to the post-Cretaceous AfricaEurope convergence, to the direction of transport of tectonic units (usually embayment or tectonic escapes with a progressive reorientation from NE-ward until reaching the SE-ward), and to the NW-SE orientation of the tectonic lineaments after the first eastward tectonic escape due to the Cretaceous docking in the northern part of the European plate (Morley 1996;Bădescu 1997;Mann 1997;Mason et al 1998;Hippolyte et al 1999;Sanders et al 1999;Ma enco & Bertotti 2000;Gibson 2001;Seghedi et al 2004;Golonka et al 2006;Gröger et al 2008;Schmid et al 2008;Ma enco et al 2010;Merten et al 2010;Márton et al 2011). The progressive reorientation of convergence and the NW-SE orientation of the tectonic lineaments should give a local geodynamic framework in the Moldavidian Basin, varying from transpressive dextral strike-slip to sinistral strike-slip passing through a purely compressive strike-slip as will be exposed in detail below by correlation with the tectonic-influence intervals detected in the sedimentary record (Fig.…”

Section: Geodynamic Constraintsmentioning

confidence: 99%

Tectonic control on the sedimentary record of the central Moldavidian Basin (Eastern Carpathians, Romania)

Guerrera¹,

Martín²,

A.³

et al. 2012

Geologica Carpathica

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Abstract:The sedimentary record of the Tarcău and Vrancea Nappes, belonging to the flysch accretionary zone of the Eastern Carpathians (Eastern Carpathian Outer Flysch), registered Cretaceous-Miocene events during the evolution of the Moldavidian Basin. Our biostratigraphic data indicate that the deposits studied are younger than previously reported. The comparison of sedimentary record studied with the Late Cretaceous-Early Miocene global eustatic curve indicates that eustatic factor played a secondary role, after the tectonic one. Four main stages of different processes influenced by tectonics are recognized in the sedimentary record: (1) Campanian-Maastrichtian-earliest Paleocene; (2) latest Ypresian-Lutetian; (3) late Chattian-earliest Aquitanian, and (4) late Aquitanian-early Burdigalian. The late Chattianearliest Aquitanian and late Aquitanian-early Burdigalian records indicate a high tectonic influence. The first event was related to the foredeep stage of the sedimentary domain studied, and the second one to the deformation stage of the same domain. The sedimentary records of tectonic influence recognized during these stages are useful tools for geodynamic reconstructions. The stratigraphic correlation of Tarcău and Vrancea sedimentary records are used to propose some constraints in the timing of the deformation for the central Moldavidian Basin and close domains.

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Magmatic constraints on geodynamic models of subduction in the East Carpathians, Romania

Cited by 116 publications

References 61 publications

A map-view restoration of the Alpine-Carpathian-Dinaridic system for the Early Miocene

A map-view restoration of the Alpine-Carpathian-Dinaridic system for the Early Miocene

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review

Tectonic control on the sedimentary record of the central Moldavidian Basin (Eastern Carpathians, Romania)

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