Alpine regional metamorphism in the main tectonic units of Hungary: A review

Research output: Contribution to journalArticle

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Abstract

New data on the spatial and temporal distributions and physical (P/T) conditions of Alpine regional metamorphic events that were active in the main tectonic units of Hungary are summarized. These data were obtained from mineral paragenetic and thermobarometric investigations carried out on polymetamorphic formations and complex mineral facies, phyllosilicate crystallinity and coal rank studies of incipient metamorphic rocks, integrated with isotope geochronological data. Subducted parts of the Neotethyan oceanic realm, such as the Mesozoic of the Kõszeg-Rechnitz (Penninic) Window and the South Gemeric Meliata Unit, exhibit high-pressure blueschist facies metamorphism of various ages, overprinted locally by a younger medium-pressure event. In the Lower Austroalpine Unit (Sopron Mts) and in the Vepor Unit the eo-Alpine medium-high pressure metamorphism even reached the amphibolite facies. The composite Pelso Unit shows no or only slight signs of eo-Alpine metamorphism. In the Bükkium and in the Igal Zone low to medium-pressure type, anchizonal and epizonal regional recrystallization was proved. In the vicinity of the Alpine overthrusts the Mesozoic formations of the Tisza Unit were locally metamorphosed under anchizonal and epizonal conditions in medium to low-pressure systems. Preliminary results suggest that Cretaceous metamorphism might have caused amphibolite facies recrystallization in certain parts of the pre-Alpine polymetamorphic basement in the Tisza Unit.

Original languageEnglish
Pages (from-to)329-344
Number of pages16
JournalActa Geologica Hungarica
Volume44
Issue number2-3
Publication statusPublished - 2001

Fingerprint

regional metamorphism
metamorphism
tectonics
amphibolite facies
blueschist facies
low pressure system
coal rank
phyllosilicate
P-T conditions
mineral
crystallinity
temporal distribution
metamorphic rock
isotope
spatial distribution
Cretaceous

Keywords

  • Alpine metamorphism
  • Carpathian Basin
  • Hungary
  • Low-grade metamorphism
  • Polymetamorphism

ASJC Scopus subject areas

  • Geology

Cite this

Alpine regional metamorphism in the main tectonic units of Hungary : A review. / Árkai, P.

In: Acta Geologica Hungarica, Vol. 44, No. 2-3, 2001, p. 329-344.

Research output: Contribution to journalArticle

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