Crustal Assimilation as a Major Petrogenetic Process in the East Carpathian Neogene and Quaternary Continental Margin Arc, Romania

Mason, Paul R.D.; Downes, Hilary; Thirlwall, M. F.; Seghedi, Ioan; Szakács, Alexandru; Lowry, David; Mattey, D. P.

doi:10.1093/petrology/37.4.927

Cited by 112 publications

(127 citation statements)

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“…The most extreme enrichment is in Perşani samples (Sărata and Hoghiz) which show high LREE and K depletion, as well as the highest Ba and Pb. These patterns are similar to those of contemporaneous calc-alkaline adakite-like rocks from the nearby South Harghita volcanic area (Mason et al, 1996;Seghedi et al, submitted) (Fig. 4).…”

Section: Summary Of Major Trace Element and Ree Datasupporting

confidence: 81%

“…1), alkalic basaltic volcanism occurred between 1.5 and 1.2 Ma, with a second pulse at ~0.6 Ma, coeval with the calc-alkaline adakite-like and shoshonitic magmatism at 1.5-0.5 Ma in the nearby South Harghita Mts. (Seghedi et al, 1987(Seghedi et al, , 2001bDownes et al, 1995b;Mason et al, 1996).…”

Section: Regional Occurrences and Chronology Of The Mafic Alkalic Magmentioning

confidence: 99%

“…Figure 3 also includes four Neogene subduction-related calc-alkaline basalts (CAB) from the CPR. Salters et al, 1988;Embey-Isztin et al, 1993;Dobosi et al, 1995;Downes et al, 1995a;Harangi et al, 1995;Dobosi & Jenner, 1999;Downes et al, 1995b;Mason et al, 1996;Seghedi et al, 2001a. Abreviations: B = Burgenland; LHP = Little Hungarian Plain; CSV = Central Slovakian Volcanic area; N-N = Nograd-Novohrad.…”

Section: Summary Of Major Trace Element and Ree Datamentioning

confidence: 99%

“…Calc-alkaline basalts (CAB) from the CPR. : 134t (9.4 Ma) Ma from north-east Hungary (Downes et al, 1995b), UA34 (~13 Ma) from the Ukrainian Carpathians (Beregovo area) (Seghedi et al 2001a;Pécskay et al, 2000), C64 (~8 Ma) from the East Carpathians (Călimani mountains) (Mason et al, 1996;Pécskay et al, 1995), Lgf (2.14 Ma) from the Perşani mountains (Downes et al, 1995a).…”

Section: Summary Of Major Trace Element and Ree Datamentioning

confidence: 99%

“…However, in the CPR, the alkalic magmatism generally followed post-collisional calc-alkaline magmatism that was related to earlier subduction. Therefore, we also include data for the most primitive subduction-related basic rocks from the CPR (Downes et al, 1995b;Mason et al, 1996;Seghedi et al, 2001a) in order to evaluate the role of subduction-affected sources in the asthenosphere. These will be referred to as the calc-alkaline basalts (CAB).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Summary Of Major Trace Element and Ree Datasupporting

confidence: 81%

Section: Regional Occurrences and Chronology Of The Mafic Alkalic Magmentioning

confidence: 99%

Section: Summary Of Major Trace Element and Ree Datamentioning

confidence: 99%

Section: Summary Of Major Trace Element and Ree Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Seghedi¹,

et al. 2004

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Fingerprinting the Late Pleistocene tephras of Ciomadul volcano, eastern–central Europe

Harangi

Molnár

Schmitt

et al. 2020

J Quaternary Science

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Late Pleistocene tephras derived by large explosive volcanic eruptions are widespread in the Mediterranean and surrounding areas. They are important isochronous markers in stratigraphic sections and therefore it is important to constrain their sources. We report here tephrochronology results using multiple criteria to characterize the volcanic products of the Late Pleistocene Ciomadul volcano in eastern-central Europe. This dacitic volcano had an explosive eruption stage between 57 and 30 ka. The specific petrological character (ash texture, occurrence of plagioclase and amphibole phenocrysts and their compositions), the high-K calc-alkaline major element composition and particularly the distinct trace element characteristics provide a strong fingerprint of the Ciomadul volcano. This can be used for correlating tephra and cryptotephra occurrences within this timeframe. Remarkably, during this period several volcanic eruptions produced tephras with similar glass major element composition. However, they differ from Ciomadul tephras by glass trace element abundances, ratios of strongly incompatible trace elements and their mineral cargo that serve as discrimination tools. We used (U-Th)/He zircon dates combined with U-Th in situ rim dates along with luminescence and radiocarbon dating to constrain the age of the explosive eruptions of Ciomadul that yielded distal tephra layers but lack of identified proximal deposits.

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H₂O‐δD‐Fe^III relations of dehydrogenation and dehydration processes in magmatic amphiboles

Demény

Vennemann

Harangi

et al. 2006

Rapid Comm Mass Spectrometry

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Stable isotope compositions of a suite of magmatic amphiboles from alkaline basalts and andesitic rocks were examined to constrain the effects of degassing processes on the hydrogen isotope compositions. The Fe 3R (as Fe 3R /Fe total ) and H 2 O contents, as well as the H isotope compositions of the amphiboles, differ markedly (27-58%, 0.5-2.2 wt%, S107 to S15%, respectively) but indicate systematic variations. The observed trends can be explained either as dehydrogenation or dehydration processes, both of which are coupled to oxidation processes, the latter most probably related to O 2S substitution within amphiboles. The dehydrogenation-dehydration models can be used to assess the primary compositions of the magmas. As an important example, dD values of amphiboles of Martian meteorites are discussed in a similar context.

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Crustal Assimilation as a Major Petrogenetic Process in the East Carpathian Neogene and Quaternary Continental Margin Arc, Romania

Cited by 112 publications

References 0 publications

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

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

Fingerprinting the Late Pleistocene tephras of Ciomadul volcano, eastern–central Europe

H₂O‐δD‐Fe^III relations of dehydrogenation and dehydration processes in magmatic amphiboles

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Crustal Assimilation as a Major Petrogenetic Process in the East Carpathian Neogene and Quaternary Continental Margin Arc, Romania

Cited by 112 publications

References 0 publications

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

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

Fingerprinting the Late Pleistocene tephras of Ciomadul volcano, eastern–central Europe

H2O‐δD‐FeIII relations of dehydrogenation and dehydration processes in magmatic amphiboles

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Product

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H₂O‐δD‐Fe^III relations of dehydrogenation and dehydration processes in magmatic amphiboles