Petrology of a new basalt occurrence in Hungary

A. Embey-Isztin, G. Dobosi, G. Noske-Fazekas, E. Árva-Sós

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A new occurrence of basalt (minimum K/Ar age 57.9 ± 2.2 m.y.) is reported from Budaliget, near Budapest. Major and minor element concentrations show that the basalts are alkaline and potassic in nature ranging from olivine tholeiite to moderately undersaturated basanite. High mg-values and concentrations of Ni and Cr indicate that some of the samples may represent primary compositions. High pressure accidental xenoliths, xenocrysts and cognate megacrysts are frequent and the chemical zoning patterns of olivine and pyroxene phenocrysts indicate a complex evolution and polibaric conditions for the crystallization. The discovery of the new basalt occurrence is important from a geodynamical point of view: prior to the last two major geodynamical events (Plio-Pleistocene rifting with associated alkali basaltic volcanism and collision of microplates with associated Miocene calk-alkaline volcanism) the continental lithosphere below NE Transdanubia may have experienced another rifting period in the Paleocene or Upper Cretaceous.

Original languageEnglish
Pages (from-to)183-196
Number of pages14
JournalMineralogy and Petrology
Volume40
Issue number3
DOIs
Publication statusPublished - Jul 1 1989

Keywords

  • Alkali basalt
  • K/Ar age
  • chemical zoning in phenocrysts
  • major and trace element geochemistry
  • peridotite xenolith

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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  • Cite this

    Embey-Isztin, A., Dobosi, G., Noske-Fazekas, G., & Árva-Sós, E. (1989). Petrology of a new basalt occurrence in Hungary. Mineralogy and Petrology, 40(3), 183-196. https://doi.org/10.1007/BF01164488