Pressure-temperature path of metapelites from the Algyo-Ferencszállás area, SE Hungary: Thermobarometric constraints from coexisting mineral assemblages and garnet zoning

Péter Horváth, P. Árkai

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The polymetamorphic evolution path of metapelites characteristic of the Algyō-Ferencszállás Metamorphic Complex of the Békés-Codru Unit (SE Hungary) is presented on the basis of microstructural and mineral paragenetic features, mineral chemical data and geothermobarometric calculations. The first (Variscan?) metamorphic event recorded by the Ca-rich part of zoned garnets from the Ferencszállás area is poorly defined, yielding conditions of 520-560 °C and 820-1010 MPa. This event was followed by a new tectonometamorphic phase that began with the formation of garnet, kyanite, muscovite, plagioclase and biotite. This younger (Alpine) event is marked by the decomposition of staurolite and biotite, and an increase in temperature and pressure. Peak metamorphic conditions reached c. 650 °C and 900 MPa in the Ferencszállás and Újszentiván areas. This P-T peak was followed by continuous decrease in temperature and pressure to c. 500-560 °C and 400-530 MPa. The P-T path calculations from the progressively zoned garnets of the Algyō area show an increase in temperature and pressure similar to the Ferencszállás area - but in shallower crustal depth - and yield 650-680 °C and 500-600 MPa for the metamorphic peak. This study, in combination with recently published geochronological data, presents the first record of Alpine amphibolite facies metamorphic overprint of the basement of the Tisza Unit, which was considered as not affected by medium-grade metamorphism younger than Variscan until now.

Original languageEnglish
Pages (from-to)1-27
Number of pages27
JournalActa Geologica Hungarica
Volume45
Issue number1
DOIs
Publication statusPublished - 2002

Fingerprint

metapelite
zoning
garnet
Hercynian orogeny
biotite
mineral
staurolite
temperature
kyanite
amphibolite facies
muscovite
plagioclase
metamorphism
decomposition
young
calculation

Keywords

  • Alpine metamorphism
  • Amphibolite facies
  • Carpathian basin
  • Garnet zoning
  • Geothermobarometry
  • Metapelite
  • P-T path
  • Tisza unit

ASJC Scopus subject areas

  • Geology

Cite this

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title = "Pressure-temperature path of metapelites from the Algyo-Ferencsz{\'a}ll{\'a}s area, SE Hungary: Thermobarometric constraints from coexisting mineral assemblages and garnet zoning",
abstract = "The polymetamorphic evolution path of metapelites characteristic of the Algyō-Ferencsz{\'a}ll{\'a}s Metamorphic Complex of the B{\'e}k{\'e}s-Codru Unit (SE Hungary) is presented on the basis of microstructural and mineral paragenetic features, mineral chemical data and geothermobarometric calculations. The first (Variscan?) metamorphic event recorded by the Ca-rich part of zoned garnets from the Ferencsz{\'a}ll{\'a}s area is poorly defined, yielding conditions of 520-560 °C and 820-1010 MPa. This event was followed by a new tectonometamorphic phase that began with the formation of garnet, kyanite, muscovite, plagioclase and biotite. This younger (Alpine) event is marked by the decomposition of staurolite and biotite, and an increase in temperature and pressure. Peak metamorphic conditions reached c. 650 °C and 900 MPa in the Ferencsz{\'a}ll{\'a}s and {\'U}jszentiv{\'a}n areas. This P-T peak was followed by continuous decrease in temperature and pressure to c. 500-560 °C and 400-530 MPa. The P-T path calculations from the progressively zoned garnets of the Algyō area show an increase in temperature and pressure similar to the Ferencsz{\'a}ll{\'a}s area - but in shallower crustal depth - and yield 650-680 °C and 500-600 MPa for the metamorphic peak. This study, in combination with recently published geochronological data, presents the first record of Alpine amphibolite facies metamorphic overprint of the basement of the Tisza Unit, which was considered as not affected by medium-grade metamorphism younger than Variscan until now.",
keywords = "Alpine metamorphism, Amphibolite facies, Carpathian basin, Garnet zoning, Geothermobarometry, Metapelite, P-T path, Tisza unit",
author = "P{\'e}ter Horv{\'a}th and P. {\'A}rkai",
year = "2002",
doi = "10.1556/AGeol.45.2002.1.1",
language = "English",
volume = "45",
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T1 - Pressure-temperature path of metapelites from the Algyo-Ferencszállás area, SE Hungary

T2 - Thermobarometric constraints from coexisting mineral assemblages and garnet zoning

AU - Horváth, Péter

AU - Árkai, P.

PY - 2002

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N2 - The polymetamorphic evolution path of metapelites characteristic of the Algyō-Ferencszállás Metamorphic Complex of the Békés-Codru Unit (SE Hungary) is presented on the basis of microstructural and mineral paragenetic features, mineral chemical data and geothermobarometric calculations. The first (Variscan?) metamorphic event recorded by the Ca-rich part of zoned garnets from the Ferencszállás area is poorly defined, yielding conditions of 520-560 °C and 820-1010 MPa. This event was followed by a new tectonometamorphic phase that began with the formation of garnet, kyanite, muscovite, plagioclase and biotite. This younger (Alpine) event is marked by the decomposition of staurolite and biotite, and an increase in temperature and pressure. Peak metamorphic conditions reached c. 650 °C and 900 MPa in the Ferencszállás and Újszentiván areas. This P-T peak was followed by continuous decrease in temperature and pressure to c. 500-560 °C and 400-530 MPa. The P-T path calculations from the progressively zoned garnets of the Algyō area show an increase in temperature and pressure similar to the Ferencszállás area - but in shallower crustal depth - and yield 650-680 °C and 500-600 MPa for the metamorphic peak. This study, in combination with recently published geochronological data, presents the first record of Alpine amphibolite facies metamorphic overprint of the basement of the Tisza Unit, which was considered as not affected by medium-grade metamorphism younger than Variscan until now.

AB - The polymetamorphic evolution path of metapelites characteristic of the Algyō-Ferencszállás Metamorphic Complex of the Békés-Codru Unit (SE Hungary) is presented on the basis of microstructural and mineral paragenetic features, mineral chemical data and geothermobarometric calculations. The first (Variscan?) metamorphic event recorded by the Ca-rich part of zoned garnets from the Ferencszállás area is poorly defined, yielding conditions of 520-560 °C and 820-1010 MPa. This event was followed by a new tectonometamorphic phase that began with the formation of garnet, kyanite, muscovite, plagioclase and biotite. This younger (Alpine) event is marked by the decomposition of staurolite and biotite, and an increase in temperature and pressure. Peak metamorphic conditions reached c. 650 °C and 900 MPa in the Ferencszállás and Újszentiván areas. This P-T peak was followed by continuous decrease in temperature and pressure to c. 500-560 °C and 400-530 MPa. The P-T path calculations from the progressively zoned garnets of the Algyō area show an increase in temperature and pressure similar to the Ferencszállás area - but in shallower crustal depth - and yield 650-680 °C and 500-600 MPa for the metamorphic peak. This study, in combination with recently published geochronological data, presents the first record of Alpine amphibolite facies metamorphic overprint of the basement of the Tisza Unit, which was considered as not affected by medium-grade metamorphism younger than Variscan until now.

KW - Alpine metamorphism

KW - Amphibolite facies

KW - Carpathian basin

KW - Garnet zoning

KW - Geothermobarometry

KW - Metapelite

KW - P-T path

KW - Tisza unit

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