High-pressure metamorphism and P-T path of the metaliasic rocks in the borehole Komjáti-11, Bódva valley area, NE Hungary

Horváth P.: High-pressure metamorphism and P-T path of the metaliasic rocks in the borehole Komjáti-11, Bódva valley area, NE Hungary. In: Acta mineralogica-petrographica, (38). pp. 151-163. (1997)

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The Alpine, polyphase, regional metamorphic evolution was revealed by mineral paragenetic, mineral chemical and chlorite crystallinity studies carried out on a representative profile of the incomplete, dismembered ophiolite complex of the Bódva Valley area (Aggtelek-Rudabánya Mts., NE Hungary). This complex belongs to the South Gemer nappe system and represents a strongly tectonized part of the Mesozoic Vardar-Meliata oceanic branch of the Neotethys. On the basis of the first description of Na-amphiboles (ferro-glaucophane and riebeckite) and the discrimination of magmatic and metamorphic Ca-amphiboles, the P-T-relative time path of the metabasic rocks was reconstructed as follows. The most probably Middle Jurassic, subduction-related epidote-blueschist fades event (ca. 7 kbar, 300-350°C) was followed by a (probably Middle Cretaceous) greenschist facies regional metamorphism (ca. 4-5 kbar, 300°C). In contrast with the earlier studies (RÉTI, 1985) no signs of an ocean-floor hydrothermal event could be proved. Thus, the present study provides the first evidence of subduction-related high-pressure assemblages in the ophiolitic rocks from the Hungarian part of Meliaticum.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 1997
Volume: 38
ISSN: 0365-8066
Page Range: pp. 151-163
Language: English
Publisher: University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39416/
Uncontrolled Keywords: Kőzettan, Ásványtan, Földtan
Additional Information: Bibliogr.: p. 162-163. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Jul. 27. 12:45
URI: http://acta.bibl.u-szeged.hu/id/eprint/24855

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