Genesis of crustal xenoliths from andesite in the Southeast Mátra Mts (Hungary) based on petrologic and geochemical studies

Anita Jávor, Zuárd Ditrói-Puskás, G. Dobosi

Research output: Contribution to journalArticle

Abstract

The newly discovered crustal xenoliths from Miocene andesites in the Matra Mts (Northeast Hungary) were classified into three petrographic types. Type 1 is a garnetiferous, plagioclase-rich cumulate rock, presumed to originate from the felsic portion of the nearby Szarvasko-Damo mafic igneous complex. The almandine-rich garnet has been inferred to be of granulite facies origin. Garnet - orthopyroxene geothermobarometry on the orthopyroxene - plagioclase corona structure around it indicates a later high temperature (800-950 °C) low pressure (3-4 kbar) retrogression event. Type 2 is also plagioclase-rich cumulate rock with contact metamorphic assemblage containing spinel, corundum and andalusite, which crystallized in the course of dehydration reactions of biotite and/or smectite in hornblende hornfels to sanidinite facies conditions. Type 3 is microsyenite, which contains abundant anorthoclase and minor amount of Na- and K-rich kaersutitic-barkevikitic amphibole.

Original languageEnglish
Pages (from-to)311-330
Number of pages20
JournalActa Geologica Hungarica
Volume49
Issue number4
DOIs
Publication statusPublished - Dec 2006

Fingerprint

andesite
plagioclase
cumulate
orthopyroxene
garnet
hornfels
almandine
retrogression
andalusite
corundum
granulite facies
hornblende
dehydration
rock
spinel
smectite
amphibole
corona
low pressure
biotite

Keywords

  • Andalusite
  • Andesite
  • Corundum
  • Crustal xenoliths
  • Garnet
  • Geothermobarometry
  • Granulite facies
  • Microsyenite
  • Mineral chemistry
  • Plagioclase cumulates
  • Spinel

ASJC Scopus subject areas

  • Geology

Cite this

Genesis of crustal xenoliths from andesite in the Southeast Mátra Mts (Hungary) based on petrologic and geochemical studies. / Jávor, Anita; Ditrói-Puskás, Zuárd; Dobosi, G.

In: Acta Geologica Hungarica, Vol. 49, No. 4, 12.2006, p. 311-330.

Research output: Contribution to journalArticle

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