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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Abstract
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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