Large-volume Permian felsic volcanism in the Tisza Mega-unit (East-Central Europe): Evidence from mineralogy, petrology, geochemistry, and geochronology
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Le résumé fourni par la source
Permian felsic volcanic rocks are widespread in the Tisza Mega-unit (Carpathian–Pannonian region), covering a relatively large area from southern Transdanubia (Hungary) to the Apuseni Mountains (Romania). The present occurrence and structural position of these Permian volcanic rocks are the result of a complex tectonic evolution (including Alpine nappe stacking and Neogene extension); meanwhile, multiple hydrothermal effects and deformation modified their microtexture and chemical composition. In this study, the same emphasis was given to Permian felsic volcanism as well as the subsequent fluid- and/or deformation-related processes in the Tisza Mega-unit to extend our knowledge in regional issues (e.g., geochronology, stratigraphy, and lithologic correlations) and to investigate if the variably altered volcanic rocks can be used in petrogenetic studies. The zircon UPb dating yields ages of ~270.4–262.9 Ma for the Apuseni samples and ~ 268.4–260.2 Ma for those of the Pannonian Basin. Whole-rock geochemistry, considering immobile trace elements, since most of the major element compositions were severely modified by alteration processes, indicates that the studied rocks are dacite to rhyolite. They belong to a voluminous silicic volcanism during the Middle Permian, most probably related to rifts. Petrography, whole-rock geochemistry, and X-ray powder diffraction mineralogy revealed that the predominant alteration of the studied rocks is hydrothermal sericitization, locally superimposed by mylonitization in greenschist to subgreenschist conditions during Alpine orogeny. The KAr dating of the separated illite fractions confirms that the ductile deformation acted during the Turonian nappe stacking, as the main Alpine deformation phase in the study area. On a regional scale, the Permian magmatism in the Tisza Mega-unit looks significantly younger than the similar magmatic activity of the stable Europe (~300–290 Ma).
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Large-volume Permian felsic volcanism in the Tisza Mega-unit (East-Central Europe): Evidence from mineralogy, petrology, geochemistry, and geochronology
- Date Crossref
- 01/11/2023
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Eötvös Loránd University Department of Petrology and Geochemistry pays non établi dans la noticeUniversité ou école supérieure
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University of Szeged Department of Mineralogy pays non établi dans la noticeUniversité ou école supérieure
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Hungarian Research Network pays non établi dans la noticeInstitution
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Institute for Geological and Geochemical Research pays non établi dans la noticeStructure de recherche
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HUN-REN Research Centre for Astronomy and Earth Sciences pays non établi dans la noticeStructure de recherche
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University of Göttingen Department of Sedimentology & Environmental Geology pays non établi dans la noticeUniversité ou école supérieure
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Romanian Academy pays non établi dans la noticeInstitution
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HUN-REN Centre for Energy Research pays non établi dans la noticeStructure de recherche
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University of Debrecen Department of Mineralogy and Geology pays non établi dans la noticeUniversité ou école supérieure
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Hungarian Academy of Sciences pays non établi dans la noticeOrganisme public
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MTA-ELTE Volcanology Research Group pays non établi dans la noticeInstitution
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Institute of Geodynamics “Sabba S. Ştefănescu” pays non établi dans la noticeStructure de recherche
Department of Petrology and Geochemistry — Eötvös Loránd University, Department of Mineralogy — University of Szeged et Hungarian Research Network, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.